full_text stringlengths 0 175k | descript stringlengths 433 3.39k |
|---|---|
The industrial revolution and the mass consumption of coal, petroleum and natural gas causes the depletion of conventional fossil-based resources. The continuous consumption of these fossil fuels causes energy shortage and global warming [1–3]. To mitigate the reliance on these resources, many countries have been plann... |
In this work, the comparative study on the performance of K2O/SiO2 and calcined dolomite catalysts was conducted via deoxygenation of waste cooking oil (WCO). KSi catalyst has the potential as a deoxygenation catalyst due to mesoporous structure catalyst with high base properties which enhance oxygen... |
The research of biomass feedstock-derived chemicals being converted into fuels has received much interest in recent years [1–5]. It contributes to the establishing green and sustainable development in carbon–neutral technology, which aids in alleviation of energy shortages and environmental pollution. Among these chemi... |
Chemoselective hydrogenation of biomass platform molecules into value-added chemicals and fuels is essential for the exploitation of biomass, and SBA-15 based metal catalysts with hydrogenation centers and acid sites seem promising in this regard. Valeric acid (VA) is the most important platform mole... |
With the depletion and increasing environmental impacts of the traditional fuels, such as coal and petroleum products, the emerging global challenge in both energy and environment fields has prompted intensive research on renewable energy-conversion and energy-storage systems, such as fuel cells, electrolyzers, and sup... |
Single-atom catalysts (SACs) have the advantages of both homogeneous and heterogeneous catalysts, which show promising application potentials in many renewable energy-conversion technologies and critical industrial processes. In particular, carbon-supported SACs (CS-SACs) are of great interest becaus... |
Because of the diverse magnetic domain configurations from superparamagnetism, single domain, vortex domain to multi-domain, magnetic functional materials with different frequency spectrum characteristics are widely used in the field of medical treatment, information record/storage, electronic device, and electromagnet... |
Magnetic domain structure plays an important role in regulating the electromagnetic properties, which dominates the magnetic response behaviors. Herein, unique magnetic vortex domain is firstly obtained in the Ni nanoparticles (NPs) reduced from the Ni-based metal-organic frameworks (MOFs) precursor.... |
Catalytic decomposition of methane (CDM) is recognized as a promising approach for the co-production of CO2-free H2 and high value-added carbon nanomaterials (CNMs) [1]. Conventionally, steam methane reforming (SMR) followed by the water-gas shift reaction is one of the most developed processes for large-scale hydrogen... |
Tierga and Ilmenite Fe-based ores are studied for the first time in the catalytic decomposition of methane (CDM) for the production of carbon dioxide-free hydrogen and carbon nanomaterials. Tierga exhibits superior catalytic performance at 800 °C. The effect of the reaction temperature, space velocit... |
With the rapid development of social economy, the environmental pollution caused by the over-utilization of traditional energy is becoming more and more serious. In order to reduce the environment damage caused by fossil fuels, it is urgently needed to develop the green sustainable energy [1–4]. Due to the advantages o... |
Cu-Ni oxide nanocomposite was synthesized via solvothermal method with nickel (II) nitrate and copper nitrate as Ni and Cu resource respectively. AuNPs/oxide nanocomposite was obtained by dispersing the oxide into the pre-synthesized Au colloid. Transmission electron microscope (TEM) shows that the s... |
There is a broad variety of possible applications for dopant transition metal oxides with different morphological structures. The possibility of tailoring their electronic properties by doping and quantum containment of carriers is one main feature that has made these materials special. The semiconductor materials have... |
Ni-doped Mn3O4 nanoparticles (NPs) were synthesized by a simple one-pot microwave combustion procedure utilizing urea as a fuel. X-ray diffraction, transmission electron microscopy (TEM), diffuse reflectance spectroscopy, Photoluminescence spectra, and vibrating sample magnetometer. The particle size... |
The increasing request for energy, chemicals, and materials globally due to megatrends needs an intervention to ensure that these supplies are produced efficiently using carbon-neutral processes and renewable feedstocks. Under this emerging socio-economic picture, biomass exploitation allows for a broad range of biofue... |
The almond industry leaves behind substantial amounts of by-products, with almond hulls being the primary residue generated. Given that one way to improve food security is by decreasing waste to reduce environmental impacts, developing sustainable processes to manage this by-product is necessary. Her... |
Electrochemically produced hydrogen is considered an essential energy storage technology in the process of decarbonization, connecting intermittent renewable energy sources with our everyday life in a CO2-neutral energy economy. In the temperature range below 100 °C, alkaline water electrolyzers (AWE) which employ liqu... |
Anion exchange membrane (AEM) water electrolysis is considered a promising solution to future cost reduction of electrochemically produced hydrogen. We present an AEM water electrolyzer with CuCoOx as the anode catalyst and Aemion as membrane and electrode binder. Full cell experiments in pure water ... |
No data was used for the research described in the article.While the cement sector is critical for sustainable growth in many countries, it generates large volumes of toxic waste on a daily basis, including CO2 emissions and cement kiln dust (CKD). Toxic waste, such as CKD, may be very harmful to human life, animals, a... |
This research is regarded as the first successful attempt at directly producing highly pure nanocomposite hydroxyapatite (HAPT) from cement kiln dust (CKD) using a cost-effective preparation method. The crystallite size of HAPT was 23.6 nm and showed a hierarchical mesoporous unit with a Ca-deficient... |
Sulfur compound contents before reaction, μg/gSulfur compound contents at reaction time t, μg/gSulfur removal, %The emission of sulfur oxides (SOX) in vehicle exhaust can cause serious environmental problems and threaten human health. Thus, countries around the world have set up strict limits on the sulfide content in ... |
Ce2(MoO4)3 was synthesized by a simple reflux method using cerium nitrate hexahydrate and ammonium molybdate as reactants. The as-prepared Ce2(MoO4)3 was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Scanning electron microscope (SEM), and X-ray photoelect... |
Data will be made available on request.Power-to-gas processes such as the catalytic hydrogenation of CO2 to CH4 are promising strategies to store renewable energy and accommodate fluctuations in energy consumption and production. Efficient CO2 methanation requires the development of active, selective, and durable catal... |
This work shows that Ru nanoparticles supported on high surface area nano MgO is a highly active and selective catalyst for CO2 methanation, which is a promising method to store renewable energy and limit the emission of greenhouse gasses. We studied the effect of the Ru loading on MgO supports with ... |
Renewable energy sources, that minimize environmental impact, have been the basis of several studies in the last few years to find aiming an alternative to substitute the use of fossil fuels. Low-cost materials have been used for biofuel production, which contribute to reducing the damage caused by fossil fuels (Sammah... |
Heterogeneous catalysts, named SPS (sodium potassium silicates), were synthesized with an alternative silica (MPI silica) obtained from beach sand. In this work, the MPI was modified with NaOH and KOH producing silicate-based catalyst for biodiesel synthesis from waste cooking oil (WCO). The obtained... |
Catalysts play a key role in today’s chemical industry. About 75% of chemical processes are based on catalytic reactions and over 90% of new processes developed in recent years use catalysts (Hagen, 2015). Catalysts may enhance reaction kinetics by orders of magnitude or provide the selectivity required for economic pr... |
Catalysts are of paramount importance as most chemical processes would be uneconomical without suitable catalysts. Consequently, the identification of appropriate catalysts is a key step in chemical process design. However, the number of potential catalysts is usually vast. To suggest promising candi... |
The alarming increase of anthropogenic emissions of greenhouse gases (GHG) is encouraging extensive research to mitigate the impact of these emissions. The transition to low-carbon societies demands strategies to reduce GHG emissions, consisted mainly of CO2 and CH4. Most of the CO2 emissions come from the consumption ... |
The increasing anthropogenic emissions of greenhouse gases (GHG) is encouraging extensive research in CO2 utilisation. Dry reforming of methane (DRM) depicts a viable strategy to convert both CO2 and CH4 into syngas, a worthwhile chemical intermediate. Among the different active phases for DRM, the u... |
Metal nanoparticles are commonly used to catalyze many chemical processes [1]. Since catalytic reactions occur at the metal surface, the high surface-area-to-volume-ratio of a nanoparticle provides an effective number of active sites per weight of metal in the overall catalyst. One of the biggest challenges for any cat... |
Stability of metal nanoparticles under reaction conditions is crucial in many catalytic processes. Nickel-based catalysts often encounter severe particle growth in the presence of carbon monoxide due to the formation and migration of nickel carbonyl. In this research, we showed that the reduction tem... |
Owing to paucity of fossil fuels, it is critical to transform renewable sources into value added compounds and fuel additives [1]. Biodiesel manufacturing has sparked a lot of interest in this direction. Transesterification of vegetable oil and animal fat yields biodiesel. Glycerol is a 10% byproduct of the overall bio... |
The performance of a highly efficient Cu0.45Zn0.15Mg5.4Al2O9 catalyst was investigated using a high-pressure autoclave reactor by adjusting several reaction conditions. The involvement of intermediates (Hydroxyacetone, Propylene glycol, Ethylene glycol) was explored to better understand the reaction ... |
Metal-air batteries, such as Zn-air batteries, Mg-air batteries, Al-air batteries are a class of safe, reliable, and efficient energy storage devices have attracted increasing attention [1]. Research has proven they have much higher theoretical energy density than that of state-of-the-art Li-ion battery by producing el... |
A series of AuPt nanoparticles supported on multi-walled carbon nanotubes (AuxPt/MWNTs) catalysts with ultrafine distribution (d ≈ 3.0 nm) were synthesized for Al-air battery cathode to enhance the oxygen reduction reaction. Among them, Au0.67Pt/MWNTs catalyst with metal loading of 10.2 wt% (Au:4.1 w... |
The Ni–25%X (X=Fe, Co, Cu, molar fraction) solid solutions were prepared and then doped into MgH2 through high-energy ball milling. The initial dehydrogenation temperatures of MgH2/Ni–25%X composites are all decreased by about 90 °C relative to the as-milled pristine MgH2. The Ni–25%Co solid solution... | |
Oxidation of alcohols to their corresponding aldehydes or acids is a fundamentally important reaction both academically and industrially [1]. Although the stoichiometric oxidant, such as KMnO4, Cr-based reagents, iodine compounds [2], are efficient and versatile in catalytic oxidation of alcohols, they are neither envi... |
Benzyl alcohol was chosen as a model substrate for Pd/hydrotalcite mediated selective oxidation of alcohols to investigate the roles of palladium precursors (Na2PdCl4, K2PdCl4, PdCl2), reduction reagents (N2H4 and NaBH4), and Pd loading amount in determining structure-activity relationship of flower-... |
CO2 conversion to high value-added chemicals such as methanol and ethylene glycol (EG), which are both important bulk chemicals, had been paid great efforts since it could solve the problem of reliance on the non-renewable fossil fuels [1–6]. However, direct hydrogenation of CO2 is limited by the high activation energy... |
The synthesis of sustainable methanol and ethylene glycol (EG) via hydrogenation of ethylene carbonate (EC) has caught researchers’ growing interests on account of the indirect chemical utilization of CO2. Core-shell Cu@GO catalysts with random nanoporous network of graphite oxide (GO) were synthesiz... |
Accumulation of degradation-resistant pollutants such as nitroaromatics and azo dyes in water bodies poses a threat to the aquatic ecosystem as well as human health. The high water solubility of certain nitroaromatics like 4-nitrophenol (4-NP) and azo dyes can make their removal quite challenging. This triggered the de... |
A simple method is reported for the preparation of silver nanoparticle (AgNP) embedded pH-responsive hydrogel microparticle catalyst via Michael addition gelation and in-situ silver nitrate (AgNO3) reduction. The AgNP-hydrogel microsphere exhibited an efficient reduction of pollutants like 4-Nitrophe... |
Hydrocracking of long-chain paraffins into transportation fuels constitutes one of the most versatile processes in the petrochemical industry. It involves the cracking and isomerization of hydrocarbons and is primarily used to obtain high-quality middle distillates. Hydroisomerization refers to processes in which the b... |
The catalytic performance in n-hexadecane hydrocracking of a set of bifunctional catalysts composed of acidic mesoporous silicas, i.e., SBA-15, MCM-41, MCM-48, and amorphous silica-alumina (ASA), and Pd as acid and (de)hydrogenation components, respectively, was investigated. The selectivity to crack... |
Data will be made available on request.Supramolecular chemistry paves a bright avenue for constructing numerous functional materials with advanced applications in adsorption/separation, catalysis, sensing, biomedical technologies etc. [1,2]. For porous materials, such as zeolites [3], mesoporous silicas [4] and mesopor... |
In this study, novel composite materials based on calix[4]arene with hydroxyl groups in the arene “bowl” (K-OH) and the aluminum(III) 2-aminoterephthalate metal organic framework (NH2-MIL-101(Al), MIL) have been synthesized according to in situ or “bottle around ship” strategy. The effect of the synt... |
Enantioselective metal-catalysis is one of the most important synthetic approaches for preparing enantioenriched compounds, which occupy a central position in areas ranging from medicinal chemistry to chiral materials. The performance of chiral metal-catalysts depends, mainly, on the correct choice of the chiral ligand... |
The success of phosphine-oxazoline ligands (PHOX) inspired the progress in P-oxazoline ligand families by modifying either the ligand backbone, the electronic and/or steric properties of the phosphine group or by exchanging the phosphine to a phosphinite or a phosphite group. In this respect, the str... |
Data will be made available on request.Modern society is heavily dependent on the chemical industries for most of its needs. This dependency comes with a huge environmental impact as a result of the constant emission of greenhouse gases from their chemical processes. In this regard, the development and integration of g... |
The present study investigates the electrochemical performance and degradation behaviour of a Nickel - Gd2O3 doped CeO2 (Ni-GDC) electrode containing single cell under steam electrolysis and co-electrolysis modes. The cell consists of the Ni-GDC fuel electrode, an 8 mol% Y2O3 stabilized ZrO2 (8YSZ) e... |
We, as humans, consume energy in different forms in our day to day life. Most of it is in the form of electrical energy that comes from the burning of finite fossil fuels. Combustion of fossil fuels harms our environment due to large scale carbon emission and alternative solutions with clean and sustainable energy are ... |
The future of the world energy lies in clean and renewable energy sources. Many technologies, such as solar cells, wind turbines, etc., have been developed to harness renewable energies in different forms of fuel. Amongst them, electrolysis of water to produce oxygen and hydrogen is one of the paramo... |
The hydrogenation of aromatic rings has been widely concerned due to its valuable applications in industry [1–3]. The hydrogenation of toluene to methylcyclohexane (MCH) is an important way of hydrogen storage [4–7]. The saturation of toxic aromatic compounds is desired because they are the main source of air pollution... |
The effects of solvents (n-hexane, isopropanol (IPA), tetrahydrofuran (THF) and methanol) on the hydrogenation of toluene over the Pd/SiO2 and Ru/SiO2 catalysts were studied. Microcalorimetric adsorption and IR spectroscopy were employed to understand the effects. It was found that n-hexane adsorbed ... |
The need to diminish fossil fuel dependence in the chemical industry has led to the intensification of bio-based alternative products. Bio-based chemicals, products that are derived from biomass and other biological materials, are pivotal to the development of a more innovative and low-emissions economy while ensuring ... |
In this study, the hydrodeoxygenation (HDO) of glycerol with in-situ produced H2
, via aqueous-phase reforming, was investigated over Ce-doped CoAl2O4 catalysts synthesized by coprecipitation. The catalytic runs were performed at 50 bar/260 ºC for 3 h TOS in a fixed bed reactor. ... |
With the increasing demand for energy and the need to decrease the use of conventional energy sources, the development and utilization of renewable energy becomes extremely important. Another aspect is the environmental pollution due to the use of traditional energy sources, so it is urgent to develop clean and efficie... |
Hydrogen is considered one of the most ideal future energy carriers. The safe storage and convenient transportation of hydrogen are key factors for the utilization of hydrogen energy. In the current investigation, two-dimensional vanadium carbide (VC) was prepared by an etching method using V4AlC3 as... |
Until date, the majority of automobile transportation uses traditional oil fuels and releases a significant amount of CO2 polluting the environment significantly. Thus, the depletion of fossil fuels (including petroleum, coal, and natural gas) and increasing energy demand are the essential challenging problems that cau... |
The development of cheap and efficient oxygen reduction and evolution reaction catalysts are important, which not only push the electrochemical energy systems including water electrolyzers, metal-air batteries, and fuel cells nearer to their theoretical limits but also become the substitute for the e... |
Electrochemical water splitting is a well-known promising technology for the sustainable production of high-purity hydrogen [1]. The development of efficient electrocatalysts primarily consisting of earth-abundant elements [2,3] for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) as well, is of gr... |
Fabricating bifunctional electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is challengeable. Herein, an efficient and durable bifunctional Ni-Fe/NiMoNx electrocatalyst has been synthesized on nickel foam. This electrocatalytic system exhibits significant HER a... |
Ever since the beginning of the twentieth century, the demand for energy and technological advances have been intercorrelated with the rapid development of new processes for the conversion of different forms of energy. The development and expansion of the car generated the increased demand for the liquid instead of pre... |
Almost a quarter of the energy consumed globally is directly or indirectly related to the use of a catalytic process. Conventional nanoparticle-based catalysts recently witnessed the dawn of its potential successor—heterogeneous single-atom catalysts (SACs), which allow the maximum possible dispersio... |
The constant growth in global energy demand has entailed a massive consumption and excessive depletion of fossil fuels, leading to an energy crisis as well as a health crisis due to greenhouse gas emissions, responsible for climate change and global temperature increase. The atmospheric CO2 level (one of the main green... |
The energy crisis caused by the incessant growth in global energy demand joint to its associated greenhouse emissions motivates the urgent need to control and mitigate atmospheric CO2 levels. Leveraging CO2 as carbon pool to produce value-added products represents a cornerstone of the circular econom... |
Efficient and sustainable electrocatalysts are needed to increase the competitivity of hydrogen energy over conventional, polluting power generation. Especially in acidic environments, such as proton exchange membrane fuel cells (PEMFC), where the stability of the catalyst is critical, material selection and design is ... |
Reliability and long-term performance are the key features of modern energy storage and conversion devices. The long-term stability depends entirely on the electrochemical and corrosion properties of device components. Single-phase mesoporous Ni-rich Ni-Pt thin films have shown to be a promising elec... |
In recent years, the contradiction between environment and human development has intensified with the acceleration of the pace of human development, thus causing various problems [1–3]. Especially in the manufacturing industry, such as steel mill, metallurgic industry, electron plating, printing, leather and pharmaceut... |
Wool-coiled MoSrOS bimetal oxysulfide catalysts were synthesized by a simple method. The catalysts were characterized by different instruments. The MoSrOS reduction activities were also investigated by the reduction of Cr(VI), Rhodamine-B (RhB), Methyl orange (MO), Methylene blue (MB) and 4-nitrophen... |
concentration, mol/m3
mass fraction, ppm or wt%activation energy of i reaction in l reactor, kJ/molpre-exponential factor of rate constant for reaction i in l reactor, h−1·(mg/kg)-n
space time, hreaction rate constant for reaction i in l reactorheat of reaction i in l reactor, kJgas-law constant, J/(mol·K)the reaction ... |
The high and low temperature dual reaction zone RTS (removing trace sulfur) technology is a novel hydrotreating process but lack of in-depth understanding of its kinetics. Three-lump and five-lump kinetic models were developed based on the diesel hydrogenation experimental data which were carried out... |
As an important intermediate in the manufacture of bulk commodity, such as nylon 6 and nylon 66, the production of cyclohexanone on a commercial scale is very intriguing[1]. Hydrogenation of phenol is thought to be a better alternative compared to the oxidation route of cyclohexane which requires harsh reaction conditi... |
Selective hydrogenation of phenol to cyclohexanone is intriguing in chemical industry. Though a few catalysts with promising performances have been developed in recent years, the basic principle for catalyst design is still missing owing to the unclear catalytic mechanism. This work tries to unravel ... |
Data will be made available on request.To cope with the climate crisis we are facing today due to greenhouse gases from fossil fuel use, the transition to renewable energy is essential. Hydrogen is a key factor in increasing the share of renewable energy because it is an efficient, clean energy carrier: it can be produ... |
Despite the promise of TiFe-based alloys as low-cost solid-state hydrogen storage materials with mild operating conditions and reasonable hydrogen capacity, their initial hydrogenation process is difficult, hindering broad utilization. The effect of alloying element on the initial hydrogenation kinet... |
Compared with conventional fossil fuels, hydrogen fuel (Nikolaidis and Poullikkas, 2017; Luo et al., 2018; Holladay et al., 2009; Dawood et al., 2020) has attracted significant attention for its unique features, such as high flame propagation velocity, high heating value of combustion, and zero carbon emissions. Howeve... |
Owing to the storage and transportation problems of hydrogen fuel, exploring new methods of the real-time hydrogen production from ammonia becomes attractive. In this paper, non-thermal arc plasma (NTAP) combining with NiO/Al2O3 catalyst is developed to produce hydrogen from ammonia with high efficie... |
Climate change caused by the burning of fossil fuels is one of the major global problems. The development for clean and renewable energy resources to ensure the sustainable development of the world is in urgent need [1,2]. Proton exchange membrane fuel cells (PEMFCs) that can convert the chemical energy (from clean and... |
Developing highly efficient electrocatalysts to facilitate the sluggish cathodic oxygen reduction reaction (ORR) is a key challenge for high-performance fuel cells. Low-dimensional materials have attracted great attention recently because of their unique structure and properties. In this review, the ... |
Scientific consensus on the dangers of anthropogenic climate change has become near irrefutable in recent years, prompting a drive to reduce greenhouse gas emissions from a number of industries. Hydrogen gas is an important bulk chemical that is used primarily in the production of fertilizers and refining of petroleum ... |
Motivated by possible future applications in low pressure drop reactors for hydrogen production by fixed bed chemical looping steam reforming (CLSR), novel high porosity fibrous mats of aluminosilicate fibres have been investigated as a substrate for Ni/Co oxygen carriers (OC’s). When compared to gra... |
Anion exchange membrane fuel cells (AEMFCs) have been investigated as a low-cost fuel cell alternative to proton exchange membrane fuel cells (PEMFCs) due to the potential use of non-platinum group metal (PGM) catalysts and the enhanced oxygen reduction kinetics on non-PGM catalysts under alkaline conditions [1–9]. The... |
Anion exchange membrane fuel cells (AEMFCs) are vulnerable to water management problems, since water is produced at the anode and consumed at the cathode. Previously we found severe voltage losses when increasing the current density in an AEMFC with a commercial Fe–N–C cathode catalyst. In the presen... |
Volatile organic compounds (VOCs) are defined by the WHO as a group of organic compounds whose melting point is lower than room temperature and boiling point is between 50 and 260 °C, including alkanes, olefins, aromatics, and so on. It has been proved that VOCs are primary pollutants of PM2.5 and photochemical smog [1... |
Three-dimensionally ordered macroporous manganese-based perovskite catalyst (3DOM AMnO3, A = Ce, La, Ni) were synthesized by PMMA hard-templating and impregnation method. Physicochemical properties of the samples were characterized by means of various techniques including XRD, BET, SEM, TEM, XPS and ... |
In catalysis science field, transition-metal heterogeneous catalysts can be considered one of the most important and far-reaching scientific developments up to now, since they promote the development of energy storage & conversion, chemicals manufacture, as well as prevention & treatment of environment pollution. The d... |
Over the past decade, the first-principles-aided thermodynamic models have become standard theoretical tools in research on structural stability and evolution of transition-metal heterogeneous catalysts under reaction environment. Advances in first-principles-aided thermodynamic models mean it is now... |
The selective oxidation of sulfides into the corresponding sulfoxides is one of the most significant procedures within both industrial and laboratory settings [1,2]. However, among a large number of traditional oxidants that have been widely used for this selective oxidation, many of them are dangerous to use or toxic ... |
The surface of the Fe3O4 has been functionalized with 3-chloropropyltrimethoxysilane, which undergoes an SN2 substitution reaction of the chloro group with the nitrogen of ligand (creatinine), offering the Fe3O4@Creatinine. A new recyclable Ag attached Fe3O4 MNPs (Fe3O4 @Creatinine@Ag) has been produ... |
Renewable biomass-based feedstocks are hydrogen deficient and often require the use of external hydrogen to generate green fuels/blends that are compatible with the current fossil fuels [1,2]. Aqueous-phase reforming (APR) is a promising catalytic route to generate hydrogen from dilute aqueous streams containing organi... |
Pt/C catalysts with varied Pt sizes and distributions were investigated for aqueous-phase reforming (APR) of ethylene glycol (EG) to H2. APR experiments were performed on a continuous-flow fixed bed reactor with a catalyst loading of 1 g and EG feeding of 120 mL h−1 at 225 °C and 35 bar for 7 h. The ... |
Chemical looping gasification (CLG) is recognized as a novel technology that has advantages in energy utilization and syngas quality improvement [1,2]. Compared with conventional gasification, CLG replaced gaseous oxygen with an oxygen carrier (OC). The OCcommonly consists of a metal oxide, thus, the product, syngas, w... |
Waste pulp (WP) is a typical byproduct of paper industry, and Chemical-looping gasification (CLG) as a recently developed technology is highly suited to dispose high-volatile wastes like WP. In order to make a high-efficiency oxygen carrier (OC) for CLG of WP, the Ni-containing electroplating sludge ... |
Hydrogen (H2), with the merits of high enthalpy, zero-emission utilization and abundant natural resources, has been considered as renewable and clean energy carrier allowing a replacement of conventional fossil fuels [1,2]. Water electrolysis as a promising environment-friendly technology for producing hydrogen, has at... |
Judiciously engineering the electrocatalysts is attractive and challenging to exploit materials with high electrocatalytic performance for hydrogen evolution reaction. Herein, we successfully perform the interface engineering by alternately depositing Co–P and Ni–Fe–P films on nickel foam, via facile... |
An imminent decarbonization of the energy sector is needed in order to reduce the environmental damage caused by fossil fuel. As a result, clean, sustainable and renewable energy sources appear to be potential alternatives. In fact, the development of hydrogen-based technologies can help to reduce or eliminate greenhou... |
This study reports the electrochemical activation (EPOC) of ruthenium catalyst film with alkaline ion conductors for hydrogen production via catalytic decomposition of ammonia. Two electrocatalysts, Ru/Na-βAl2O3 and Ru/K-βAl2O3 have been prepared, characterized, and tested under low temperature react... |
The intensive consumption of fossil fuels along with excessive emission of carbon dioxide (CO2) acceleratingly exacerbate global environmental problems, which severely limit the potential of a sustainable progress of human civilization.
1,2
Developing clean energy conversion technologies becomes extremely urgent to ci... |
The scaling up of electrocatalytic CO2 reduction for practical applications is still hindered by a few challenges: low selectivity, small current density to maintain a reasonable selectivity, and the cost of the catalytic materials. Here we report a facile synthesis of earth-abundant Ni single-atom c... |
With recent changes in the energy-consuming sector's advancements and depleting fossil fuels, significant attention has been drawn to transform renewable resources into transportation fuels and fine chemicals [1,2]. Selective chemical conversion of lignocellulosic biomass, especially cellulose and hemicellulose, provid... |
This work presents the formation of butyl levulinate, a potential fuel additive, and an excellent renewable chemical obtained by the butanolysis of furfuryl alcohol (FAL) over a solid acid catalyst. The butanolysis of furfuryl alcohol reaction is a strong function of acidity for which tungstated zirc... |
The authors are unable or have chosen not to specify which data has been used.Cobalt is widely used in metallurgy, mainly in the manufacturing of alloys which are corrosion and wear resistant while cobalt superalloys are also heat resistant [1]. Moreover, cobalt is also used to make magnets and high-speed tool steels. ... |
The solvent extraction of Co(II) from its aqueous solutions free of acids or chloride salts at high concentration by the ionic liquids trihexyl(tetradecyl)phosphonium bis(2,4,4-trimethylpentyl)phosphinate ([P66614][C272]) and trihexyl(tetradecyl)phosphonium thiocyanate ([P66614][SCN]) was characteris... |
Industrial waste management is beneficial for the energy security of Poland and development of local economy. The by-products of food industry are abundant sources of biomass which can be thermally converted into fuel, chemicals, or used for environmental applications [1–3]. One of the methods to utilize the by-product... |
This study describes an experimental investigation comparing the effects of two catalysts (ZSM-5 and Zeolite Y) on intermediate pyrolysis. The catalysts are characterized by different acidities, expressed by silica-to-alumina ratios of 352 (ZSM-5) and 26 (Zeolite Y). The post-extraction rapeseed meal... |
No data was used for the research described in the article.Dibenzyl phosphateDimethylglyoximePolyethylene glycolNickel-metal hydride batteryNiMHB anodeIonic liquidRare earth elementLight rare earth elementHeavy rare earth elementRare earth element oxideLanthanidesLayered double hydroxideAqueous biphasic systemExtractio... |
The recycling of nickel-metal hydride batteries (NiMHBs) has garnered significant attention in recent years due to the growing demand for critical metals and the implementation of national and international legislation aimed at achieving zero carbon emissions and reducing environmental impact. Typica... |
This paper outlines a viable method to grow Pt/Ni nanoparticles on TiO2 nanotube surfaces, directly from solutions that resemble those available in industrial nickel processing. Global nickel resources originate from two different types of ores, sulfides and laterites, which in hydrometallurgical Ni recovery are dissol... |
Solutions that simulate hydrometallurgical base metal process streams with high nickel (Ni) and minor platinum (Pt) concentrations were used to create Pt/Ni nanoparticles on TiO2 nanotube surfaces. For this, electrochemical deposition – redox replacement (EDRR) was used that also allowed to control t... |
Data will be made available on request.Carbon dioxide (CO2) emissions to the atmosphere exhibit an economic burden and an environmental threat due to their significant contribution to climate change and global warming [1, 2]. In 2021, according to the International Energy Agency (IEA) the global CO2 emissions were proj... |
The hydrogenation of CO2 to methanol is one of the promising CO2 utilization routes in the industry that can contribute to emissions mitigation. In this work, improved operating conditions were reported for the sustainable catalytic hydrogenation of CO2 to methanol using Cu/ZnO/Al2O3 catalyst operate... |
Since the 1970s societal focus on air quality and pollution control has introduced legislation requiring a continuous lowering of the sulfur content in transportation fuels implying that almost all crude oil (ca. 2500 million tons annually) is to be hydrotreated. In most of the world the maximum sulfur content in gasol... |
We introduce a tertiary transition metal sulfide nanostructure, Pt-Co-Mo-S, for catalytic hydrodesulfurization (HDS) of sulfur-containing molecules in crude oil distillates with the aim to produce ultra-low sulfur transport fuels. The addition of ppm-levels of Pt to a standard industrial Co-Mo-S cata... |
Activated carbon fiber, also known as the third generation of activated carbon material, is a new type of activated carbon material after powder and granules, made of the organic fiber. Activated carbon fiber has a strong adsorption capacity due to its large specific surface area, and can adsorb and ... | |
Over the last decades, the use of Bronsted acid catalysts has been increased in both laboratories and industries processes, such as biodiesel production, esterification and hydrolysis because of liquid phase limitations, hard separation, non-recovery acidic waste generation and the corrosion of reactors [1, 2, 3, 4]. N... |
Over the past several decades, the fabrication of novel ceramic nanofibers applicable in different areas has been a frequent focus of scientists around the world. Aiming to introduce novel ceramic core-shell nanofibers as a magnetic solid acid catalyst, Fe2O3@SiO2–SO3H magnetic nanofibers were prepar... |
Data will be made available on request.Lignocellulose, the natural composite of cellulose, hemicellulose and lignin, is the most abundant form of biomass [1]. Different from cellulose and hemicellulose, lignin is composed of aromatic units, such as sinapyl (S), coniferyl (G) and p-coumaryl (H) alcohols as well as ferul... |
The dissolution and solvolysis processes of enzymatic hydrolysis lignin (EHL) in ethylene glycol are investigated. Ethylene glycol exhibits high EHL solubility and achieves complete EHL dissolution at room temperature. Gaussian simulation reveals that van de Waals interactions between ethylene glycol... |
Energy and the environment are among the most important concerns of the current era. However, most of the energy we are using still comes from nonrenewable fossil fuels obtained from reserves that are ultimately unsustainable and that result in environmental pollution. The conversion of energy from renewable energy sou... |
Improving catalytic activity and durabilty through the structural and compositional development of bifunctional electrocatalysts with low cost, high activity and stability is a challenging issue in electrochemical water splitting. Herein, we report the fabrication of heterostructured P-CoMoO4@NiCoP o... |
Direct methanol fuel cells (DMFC) are a type of efficient, ‘green’ power source in which chemical energy can be converted to electric energy via the oxygen reduction reaction (ORR) on the cathode and the methanol oxidation reaction (MOR) on the anode [1,2]. It is known that the performance of a DMFC is mainly determine... |
The performance of a direct methanol fuel cell (DMFC) is strongly dependent on the catalytic anode. A high-performance anode is expected to offer enhanced intrinsic activity and/or a large electrochemical surface area. Herein, a series of Ag-core/Pd-shell (Ag@Pd
x
... |
Increasing concerns about energy consumption, exhaustion of fossil fuel resources and global warming have enhanced attention in making of bio-based chemicals/fuels through biorefineries [1–3]. Lignocellulosic biomass is the prompting abundant carbon source in making value added chemicals and fuels. Cellulose and hemice... |
Selective catalytic hydrodeoxygenation (HDO) of 5-hydroxymethylfurfural (HMF) to prepare 2, 5-dimethylfuran (DMF) was studied as this product is a good biofuel. A sequence of copper dispersed on SBA-15 catalysts are designed and tested their activity for HMF hydrodeoxygenation reaction. The physico-c... |
Hydrogen peroxide (H2O2) is one of the most important chemical compounds [1]. This environmentally friendly compound is used as an oxidizer in green chemistry due to its only by-product (H2O) harmless nature. Moreover, hydrogen peroxide has many uses in the pulp/paper industry, water purification, rocket fuel, and chem... |
A series of CoPd/KIT-6 bimetallic catalysts with various Co:Pd molar ratios at different calcination temperatures were prepared and used for the direct synthesis of H2O2 from H2 and O2. These catalysts were characterized by nitrogen adsorption–desorption, low and wide-angle X-ray diffraction (XRD), X... |
Now-a-days fuel cells are contributed as highly efficient and eco-friendly energy sources [1,2]. It converts the chemical energy into electrical energy by anodic fuel (ethanol/methanol) oxidation and cathodic oxygen reduction with very little environmental pollution [3]. Still, now it is challenging to use the same cat... |
In this report, we have synthesized nitrogen-functionalized carbon nanotube (NCNT) supported palladium nanoparticles (NCNT-Pd) by using facile chemical reduction method at room temperature. This material has been used as electrocatalyst for electrochemical oxygen reduction reaction (ORR) and ethanol ... |
Deactivation factorUnit conversion factor (
mol
C
H
4
min
g
N
i
∕
mmol
C
H
4
∕
s
∕
m
c
a
t
2
)Specific heat capacity of the macroparticle (J/kg
p
a
r
t
i
c
l
e
/K)Specific heat capacity of the grain (J/kg
s
u
p
p
o
r
t
/K)WeiszPrater criterion (Equation 37)Effective d... |
ThermoCatalytic Decomposition of methane (TCD) is studied as a method to convert natural gas into hydrogen and functional carbon. In these processes the carbon typically formed on top of a catalyst phase leading to particle growth. Therefore, the development of a particle growth model is necessary to... |
In the past century, petroleum has made important contributions to the rapid development of economy and society. As a result of the gradual depletion and non-renewability of petroleum, the use of non-petroleum resources instead of petroleum is of great significance. This alternative route can be generally achieved thro... |
Achieving high conversion of syngas to fuels and basic chemicals with excellent selectivity and stability remains a challenge. Here, we report an 80.6% selectivity of gasoline-range C5–11 hydrocarbons at 86.3% CO conversion over a dual-bed catalyst (CZA + Al2O3)/N-ZSM-5(97) that consists of an upper-... |
With the current energy crisis and increasingly serious environmental issues, it is very inevitable to search for renewable and sustainable energies as alternatives to fossil fuels [1]. In the portfolio of renewable energies development, H2 energy from formic acid (FA) is generally regarded as one of the most promising... |
The present work, in which cellulose isolated from formic acid fractionation (FAC) is decorated with polyetherimide (PEI) to attain highly efficient cellulose-derived PdAgbimetallic catalyst (PdAg-PEI-FAC), has been investigated, and the catalyst properties are characterized by XRD, XPS, BET, ICP-AES... |
As one of the most important inorganic chemicals, ammonia is responsible for supporting approximately 27 % of global population [1,2]. The Haber-Bosch process for ammonia synthesis is regarded as one of the greatest inventions of the last century [1]. Since then, a great deal of effort has been made to develop new ammo... |
For the first time, new Sm doped cerium oxynitrides with the formula Ce1-zSmzO2-xNy (z ≤ 0.5) are synthesized in order to maximize the concentration of anion vacancies. Single phase Sm-doped CeO2-xNy were confirmed by XRD, HRTEM and Rietveld refinement. These oxynitrides show a great promotion effect... |
The production of fuels, such as bio-kerosene for aviation transportation, directly from lignocellulosic biomass is of increasing interest for energy sustainability [1]. Unfortunately, bio-oil produced via thermal pyrolysis of biomass does not meet the requirements desired for a transportation fuel as it is very viscou... |
The modes of deactivation -and the extent to which their properties can be restored- of two catalyst bodies used in cascade for bio-oil synthesis have been studied. These catalysts include a solid acid granulate (namely ZrO2/desilicated zeolite ZSM-5/attapulgite clay) employed in ex-situ catalytic fa... |
The current energy landscape based on fossil fuels created enormous economic and environmental problems such as greenhouse emission, climate change, solid waste pollution et al. Hydrogen economy is a clean alternative to fossil fuels [1–7]. Looking for an efficient, low-cost and safe hydrogen storage method is the prer... |
Ni and carbon materials exhibit remarkable catalysis for the hydriding reaction of Mg. But the underlying mechanism of Ni/C hybrid catalysis is still unclear. In this work, density functional theory (DFT) calculation is applied to investigate the effect of Ni/C co-incorporation on the hydriding react... |
Currently, the production of sustainable and low-cost energy resources has become an urgent necessity to overcome the most serious issues that face the contemporary world about the future availability of fossil fuels (Sayed et al., 2020; Basyouny et al., 2021). Biodiesel or the extracted diesel from the bio-resources w... |
Raw coal without carbonization was treated with sulfuric acid at different concentrations (70% to 95%) as a controlled sulfonation process to produce a simple and effective acidic catalyst. The synthetic catalyst (S.Coal) at the best
... |
Due to the depletion of fossil fuel reserves, converting renewable and abundant biomass into fuels and chemicals becomes important [1–4]. Lignin is one of the main components of lignocellulose, mainly consisting of three aromatic units, i.e., p-coumaryl alcohol (H), coniferyl alcohol (G) and sinapyl alcohol (S), which ... |
Low selectivity and complex product distribution are the main challenges for the utilization of lignin. Herein, the selective production of 2-(tert-butyl)-3-methylphenol (TBC), an antioxidant in the polymer industry, from depolymerization of enzymatic hydrolysis lignin (EHL) on a hydrothermally synth... |
No data was used for the research described in the article.Montmorillonite with chemical formula (Na,Ca)0.3(Al,Mg)2Si4O10(OH)2n(H2O) is a very soft phyllosilicate group of minerals was first described in 1847 for an occurrence in Montmorillon in the department of Vienne, France, more than 50 years before the discovery ... |
Microscopic crystals with soft phyllosilicate group of minerals which formed through precipitation of water solution, are called montmorillonite (MMT). It is concentrated and transformed by natural weathering in environment caves and left aluminosilicates which were contained in the bedrock. By the a... |
The growing scarcity of water in the world today forces researchers to investigate more deeply various water conservation schemes and explore new water purification technologies. There is also a need to find solutions for the increasing presence of microbial and chemical pollutants in water (Brillas et al., 2009; Shann... |
Heterogeneous Fenton catalysts are emerging as excellent materials for applications related to water purification. In this review, recent trends in the synthesis and application of heterogeneous Fenton catalysts for the abatement of organic pollutants and disinfection of microorganisms are discussed.... |
The water electrolysis process occurs through two simultaneous half-cell reactions: the oxygen evolution reaction (OER) on the anode and the hydrogen evolution reaction (HER) on the cathode. The Alkaline OER is a 4-electron–proton transfer process that makes the reaction sluggish with high overpotential and complex rea... |
The development of cost-effective and active water-splitting electrocatalysts is an essential step toward the realization of sustainable energy. Its success requires an intensive improvement in the kinetics of the anodic half-reaction of the oxygen evolution reaction (OER), which determines the overa... |
The fossil-based energy system and the dependence on fossil fuels have exacerbated climate change, resulting in an environmental crisis [1]. A change in the fuel production and consumption strategies become necessary in order to reduce the greenhouse gases and other emissions responsible for the global warming. Any alt... |
This study examined the influence of process variables (glycerol concentration in feed, coupled temperature/pressure and space velocity) in the catalytic performance in the APR of glycerol over 0.3Pt/CoAl catalyst in a continuous fixed-bed reactor in order to maximize the production of H2. The effect... |
Because of the growing demand for energy, hydrogen production has evolved as a fossil fuel substitute due to its high heat and lack of environmentally concerning exhaust gases [1–5]. At present, as the application of HER, electrochemical catalysis and photoinitiated water splitting have opened up new avenues to obtain ... |
Electrochemical catalysts for the hydrogen evolution reaction (HER) have attracted increasing attentions. Noble metal-free cocatalysts play a vital role in HER applications. Herein, a novel strategy to prepare a Ni2P/MoS2 cocatalyst through a simple hydrothermal-phosphorization method was reported, a... |
Data will be made available on request.Hydrogen is the green energy with the greatest potential in the 21st century. The hydrogen produced industrially in the water-to-gas conversion processes or steam reforming processes contains other impurities, including CO2, N2 and CO, etc. [1]. Therefore, it is required to purify... |
Silica membranes possess gas separation characteristics, but their undesirable performances and poor hydrothermal stabilities hinder the application in industrial gas treatments. To solve the problems, we have devised a new membrane preparation method involving methyl group modification and nickel-co... |
Although the lockdowns and other measures implemented to cope with the Covid-19 pandemic substantially reduced the global energy demand, it is expected that the trend will be on the rise again in the near future. By and large, fossil fuel is still an important source of energy for industries, households, especially for... |
This work focused on the conversion of crude palm kernel oil (CPKO) to biojet fuel via deoxygenation reaction in a fixed bed reactor. The catalyst was Pt supported on activated carbon (Pt/C). The investigation involved the effects of various operating parameters such as reaction temperature (350–420 ... |
Data will be made available on request.The number of daily activities that possess a serious threat to humanity is increasing, which worsens the situation globally. According to the World Economic Forum and the World Health Organization, antibiotic resistance is arguably the biggest threat of the 21st century and might... |
Schiff bases are versatile chemical compounds that are frequently utilized and manufactured by reacting various amines with carbonyl compounds (aldehydes/ketones), resulting in the formation of the azomethine/imine (–CN–) group by condensation reaction. Medical science is driven to generate novel dru... |
Due to dwindling reserves of easily accessible fossil resources and the increasing demand for fuels and chemicals, there is a growing need to develop efficient catalytic routes from renewable lignocellulosic biomass to fuels and chemicals. Cellulose, which is a renewable feedstock derivable, can be converted to platfor... |
Hydrogenation of levulinic acid to γ-valerolactone is a key reaction in the valorization of carbohydrates to renewable fuels and chemicals. State-of-the-art catalysts are based on supported noble metal nanoparticle catalysts. We report the utility of a bimetallic Fe-Re supported on TiO2 for this reac... |
Adsorption energyBond lengthMayer bond orderReaction EnergyActivation EnergyWith the adjusted energy structure and change in the supply-demand relationship, the production capacity of fossil fuels in the petrochemical industry is decreasing gradually, while the production capacity of chemical raw materials must be urge... |
The charge distribution on Ni–Mo–S active sites can affect hydrodenitrogenation (HDN) activity. In this study, a series of model Ni–Mo–S were developed with various charge distributions. For comparison, the charge distribution effects on quinoline HDN were studied. The results show that a lack of ele... |
Lignin, the most abundant renewable aromatic material on Earth, can be potentially exploited for the sustainable supply of fuels and chemicals which are currently derived from rapidly depleting and greenhouse gas emitting fossil resources [1–5]. Lignin, constituting 15–30 % of the biomass weight and up to 40 % of the b... |
Thermochemical processing of lignin ends up with a major problem which is the high yield of char remained from lignin conversion, causing low yields of desired products. The ReS2/Al2O3 catalyst, used in this work, exhibited a high char-suppressing potential and high hydrodeoxygenation efficiency in t... |
The increasing environmental pollution and the depletion of nonrenewable energy have raised awareness towards the development of hydrogen storage systems as a viable source of clean energy. However, the suitability for on-board application has been a challenge to realizing the much-anticipated hydrogen economy [1]. MgH... |
This paper presents the catalytic effect of NaH doped nanocrystalline TiO2 (designated as NaTiOxH) in the improvement of MgH2 hydrogen storage properties. The catalyst preparation involves ball milling NaH with TiO2 for 3 hr. The addition of 5 wt% NaTiOxH powder into MgH2 reduces its operating temper... |
For hydrogen to become competitive compared to fossil fuels, cost effective and sustainable catalytic materials are needed for low-temperature water-electrolysis. The oxygen evolution reaction (OER) is the main limiting step of the overall water-splitting process, as it presents a large overpotential in comparison to t... |
The Oxygen Evolution Reaction (OER), half-reaction of the water-splitting process for hydrogen production, suffers from sluggish kinetics. NiFe materials appeared as interesting catalytic materials for this reaction in alkaline electrolyzers and have been studied, particularly in the form of NiFe Lay... |
Benzophenone reduction is a common process in chemical industry. Its main product, diphenylmethanol (also known as benzhydrol), has an important role in perfume and pharmaceutical manufacturing. Many different benzophenone reduction methods have already been reported such as photoelectrochemical method [1], electrocata... |
Catalytic activity of palladium catalysts with two different types of carbon support, Norit (an activated carbon), and bamboo-shaped carbon nanotubes (BCNT) have been tested for benzophenone hydrogenation. The selectivity toward the two possible reaction products (benzhydrol and diphenylmethane) can ... |
Hydrogen generation from photoelectrochemical (PEC) water-splitting provides a promising route to store the intermittent solar energy, and serves as a sustainable and environmentally-benign alternative to the existing hydrogen production technologies. The essential component of these PEC water-splitting systems is the ... |
Photoelectrochemical reforming of plastic waste offers an environmentally-benign and sustainable route for hydrogen generation. Nonetheless, little attention was paid to develop electrocatalysts that can efficiently and selectively catalyze oxidative transformation of valueless plastic wastes into va... |
Porous carbons have been widely used as catalyst supports for the preparation of heterogeneous catalysts because of their high surface area, high chemical and thermal stabilities, diverse surface properties, and tunable macroscopic shape [1–6]. However, the main limitation of carbon materials as support for metal catal... |
Porous graphene (PG) prepared from reduction and KOH activation of graphene oxide was heat-treated under argon atmosphere to obtain a partially graphitized porous carbon with high oxidation resistance. Transmission electron microscopy, Raman spectroscopy, synchrotron X-ray diffraction, and N2 adsorpt... |
The steam reforming of hydrocarbons is a widely used process for obtaining hydrogen. Nowadays, almost 50 % of its worldwide production is acquired via steam reforming reaction [1,2]. The process analyzed in this research occurs between methane and steam, specifically. It produces a mixture of H2 and CO, commonly known ... |
The presented research focuses on an optimization design of a catalyst distribution inside a small-scale methane/steam reforming reactor. A genetic algorithm was used for the multiobjective optimization, which included the search for an optimum of methane conversion rate and a minimum of the differen... |
This study did not generate any datasets.Catalysis is a key process in science that allows to control all kinds of chemical transformations. In the presence of a suitable catalytic material the reaction rate can be dramatically increased, which enables the optimal use of resources, increasing the yield of desired produ... |
Functionalized (hetero)aromatic compounds are indispensable chemicals widely used in basic and applied sciences. Among these, especially aromatic aldehydes, ketones, carboxylic acids, esters, nitriles, and amides represent valuable fine and bulk chemicals, which are used in chemical, pharmaceutical, ... |
Hydrogen is hailed as an environmentally benign alternative to traditional fossil fuels because it has a high energy density and produces zero pollution [1,2]. However, to date, hydrogen is primarily produced by steam reforming of fossil resources. From an environmental and sustainability perspective, hydrogen producti... |
Electrochemical water splitting is a sustainable and feasible strategy for hydrogen production but is hampered by the sluggish anodic oxygen evolution reaction (OER). Herein, an effective approach is introduced to significantly decrease the cell voltage by replacing the anodic OER with a urea oxidati... |
The accumulation of waste plastics in landfills and oceans has caused a global environmental crisis.
1–3
In particular, microplastics have been entering the food chain and become a potential threat to human health (B. Liebmann et al., 2018, Microplastics 2018, conference). Although there are thousands of plastic mater... |
Polyethylene (PE) is the most popular plastic globally, and the widespread use of plastics has created severe environmental issues. High energy consumption in the current process makes its recycling a challenging problem. In our report, the depolymerization of high-density PE was conducted in various... |
With the rapid industrial development, an increasing number of organic pollutants are discharged into the aquatic environment, producing negative impacts on humans, plants, and animals, as well as the entire ecosystem (Trejo-Castillo et al., 2021). Benzotriazole (BTA), a widely used chemical, has become a common additi... |
Given the difficulties of degrading benzotriazole (BTA), this study used a one-pot hydrothermal method to prepare α-Fe2O3/Cu2O (FC) composites for photoelectrocatalytic (PEC) degradation of BTA. The characterization of FC structure showed that Cu2O in cubic crystals was loaded with circular sheets of... |
Data will be made available on request.Solid carbon is imperative for numerous applications, and its diverse properties stem from the many allotropes, and various compounds and composites that may be formed from carbon precursors, e.g. diamond, graphite, carbon fibers, cokes, carbon black, activated carbon, and carbon ... |
Transition metals supported on carbons play an important role in catalysis and energy storage. By pyrolysis of metal alginate, highly active catalysts for the Fischer-Tropsch synthesis (FTS) can be produced. However, the evolution of the carbon (alginate) and transition metal (Fe3+) during pyrolysis ... |
The typical strategies for NOx removal in automotive exhaust include Three-way Catalytic Conversion (TWC), NOx Storage Reduction (NSR) and Selective Catalytic Reduction (SCR) technologies [1,2]. A three-way catalyst requires to be operated under near stoichiometric conditions, while NSR and SCR catalysts are functionin... |
A series of model NOx storage-reduction (NSR) catalysts with different Rh/Pt weight ratios were prepared independently by wet impregnation and then mechanically mixed to investigate the effect of the Rh/Pt weight ratio on the overall NOx removal efficiency and nitrogen yield. XRD, EDS and H2-TPR stud... |
In the chemical industry, the catalytic dehydrogenation reactions are commonly used, and in the preparation of pharmaceuticals and fine chemicals, such reactions involving the oxygenated compounds are particularly important (Singh and Vannice, 2001). The main procedure for cyclohexanone production is the catalytic dehy... |
In different hydrocarbons reactions, copper based catalysts have industrial importance especially in the synthesis of the cyclohexanone from dehydrogenation of the cyclohexanol. At operating conditions, one of the significant problems in the industrial process is fast deactivation of the copper based... |
Data will be made available on request.An increasing demand for efficient electrochemical energy storage and conversion system in modern society has stimulated the development of novel rechargeable batteries that can realize the portable electronic revolution, in which highly sophisticated portable devices such as dron... |
The integration of bifunctionally active sites of multielement random alloy catalysts with other metal oxide electrocatalysts is a promising strategy for efficient electrochemical reactions. In this study, a novel combination of virtual crystal approximation and hydrothermal synthesis was used to inv... |
Hydrogen (H2) economy is an envisioned future in which the main source of energy of a nation is derived from hydrogen storage and application in the short, medium, and long term [1]. H2 produced from green chemistry based on water electrolysis – mostly derived from the use of wind and solar energy sources [1] – is requ... |
It is well known that the benchmark electrocatalysts for OER in alkaline solution are RuO2 and IrO2; however, the high cost, scarcity, and instability of these metal oxides impede their ample use in OER processes, and this has fueled the search for cheap Earth-abundant elements which are equally effi... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.