Subjects -> ENGINEERING (Total: 2791 journals)
    - CHEMICAL ENGINEERING (248 journals)
    - CIVIL ENGINEERING (242 journals)
    - ELECTRICAL ENGINEERING (176 journals)
    - ENGINEERING (1402 journals)
    - ENGINEERING MECHANICS AND MATERIALS (452 journals)
    - HYDRAULIC ENGINEERING (56 journals)
    - INDUSTRIAL ENGINEERING (100 journals)
    - MECHANICAL ENGINEERING (115 journals)

ENGINEERING (1402 journals)                  1 2 3 4 5 6 7 8 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 2)
3D Research     Hybrid Journal   (Followers: 17)
AAPG Bulletin     Hybrid Journal   (Followers: 9)
Abstract and Applied Analysis     Open Access   (Followers: 1)
Aceh International Journal of Science and Technology     Open Access   (Followers: 3)
ACS Nano     Hybrid Journal   (Followers: 187)
Acta Geotechnica     Hybrid Journal   (Followers: 6)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 8)
Acta Nova     Open Access  
Acta Polytechnica : Journal of Advanced Engineering     Open Access  
Acta Universitatis Cibiniensis. Technical Series     Open Access   (Followers: 1)
Active and Passive Electronic Components     Open Access   (Followers: 5)
Adaptive Behavior     Hybrid Journal   (Followers: 8)
Additive Manufacturing Letters     Open Access   (Followers: 5)
Adsorption     Hybrid Journal   (Followers: 4)
Advanced Energy and Sustainability Research     Open Access   (Followers: 4)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 10)
Advanced Engineering Research     Open Access  
Advanced Journal of Graduate Research     Open Access   (Followers: 1)
Advanced Quantum Technologies     Hybrid Journal   (Followers: 1)
Advanced Science     Open Access   (Followers: 11)
Advanced Science Focus     Free   (Followers: 5)
Advanced Science Letters     Full-text available via subscription   (Followers: 8)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 3)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 19)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 2)
Advances in Applied Energy     Open Access   (Followers: 4)
Advances in Catalysis     Full-text available via subscription   (Followers: 7)
Advances in Complex Systems     Hybrid Journal   (Followers: 10)
Advances in Engineering Software     Hybrid Journal   (Followers: 25)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 19)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 27)
Advances in Natural Sciences : Nanoscience and Nanotechnology     Open Access   (Followers: 28)
Advances in Operations Research     Open Access   (Followers: 13)
Advances in OptoElectronics     Open Access   (Followers: 6)
Advances in Physics Theories and Applications     Open Access   (Followers: 12)
Advances in Polymer Science     Hybrid Journal   (Followers: 50)
Advances in Remote Sensing     Open Access   (Followers: 58)
Advances in Science and Research (ASR)     Open Access   (Followers: 8)
Aerobiologia     Hybrid Journal   (Followers: 2)
Aerospace Systems     Hybrid Journal   (Followers: 6)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 7)
AIChE Journal     Hybrid Journal   (Followers: 31)
Ain Shams Engineering Journal     Open Access   (Followers: 1)
Al-Nahrain Journal for Engineering Sciences     Open Access  
Al-Qadisiya Journal for Engineering Sciences     Open Access  
AL-Rafdain Engineering Journal     Open Access  
Alexandria Engineering Journal     Open Access   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 21)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 7)
American Journal of Engineering Education     Open Access   (Followers: 13)
American Journal of Environmental Engineering     Open Access   (Followers: 6)
American Journal of Industrial and Business Management     Open Access   (Followers: 23)
Annals of Civil and Environmental Engineering     Open Access   (Followers: 1)
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Pure and Applied Logic     Open Access   (Followers: 4)
Annals of Regional Science     Hybrid Journal   (Followers: 7)
Annals of Science     Hybrid Journal   (Followers: 9)
Annual Journal of Technical University of Varna     Open Access  
Antarctic Science     Hybrid Journal   (Followers: 1)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 3)
Applicable Analysis: An International Journal     Hybrid Journal   (Followers: 1)
Applications in Energy and Combustion Science     Open Access   (Followers: 2)
Applications in Engineering Science     Open Access  
Applied Catalysis A: General     Hybrid Journal   (Followers: 7)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 9)
Applied Clay Science     Hybrid Journal   (Followers: 6)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 16)
Applied Energy     Partially Free   (Followers: 25)
Applied Engineering Letters     Open Access  
Applied Magnetic Resonance     Hybrid Journal   (Followers: 3)
Applied Nanoscience     Open Access   (Followers: 7)
Applied Network Science     Open Access   (Followers: 2)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 4)
Applied Physics Research     Open Access   (Followers: 5)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 5)
Arab Journal of Basic and Applied Sciences     Open Access  
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 1)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 5)
Archives of Foundry Engineering     Open Access  
Archives of Thermodynamics     Open Access   (Followers: 10)
Arctic     Open Access  
Arid Zone Journal of Engineering, Technology and Environment     Open Access  
Arkiv för Matematik     Hybrid Journal  
ArtefaCToS : Revista de estudios sobre la ciencia y la tecnología     Open Access  
Asian Journal of Applied Science and Engineering     Open Access  
Asian Journal of Applied Sciences     Open Access   (Followers: 2)
Asian Journal of Biotechnology     Open Access   (Followers: 8)
Asian Journal of Control     Hybrid Journal  
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 5)
Assembly Automation     Hybrid Journal   (Followers: 2)
ATZagenda     Hybrid Journal  
ATZextra worldwide     Hybrid Journal  
AURUM : Mühendislik Sistemleri ve Mimarlık Dergisi = Aurum Journal of Engineering Systems and Architecture     Open Access   (Followers: 1)
Australasian Journal of Engineering Education     Hybrid Journal   (Followers: 3)
Australasian Physical & Engineering Sciences in Medicine     Hybrid Journal   (Followers: 1)
Australian Journal of Multi-Disciplinary Engineering     Hybrid Journal  
Autocracy : Jurnal Otomasi, Kendali, dan Aplikasi Industri     Open Access  
Automotive and Engine Technology     Hybrid Journal  
Automotive Experiences     Open Access  
Automotive Innovation     Hybrid Journal  
Avances en Ciencias e Ingenierías     Open Access  
Avances: Investigación en Ingeniería     Open Access  
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 2)
Bangladesh Journal of Scientific and Industrial Research     Open Access  
Basin Research     Hybrid Journal   (Followers: 6)
Batteries & Supercaps     Hybrid Journal   (Followers: 5)
Bautechnik     Hybrid Journal   (Followers: 1)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 27)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access  
Beyond : Undergraduate Research Journal     Open Access  
Bhakti Persada : Jurnal Aplikasi IPTEKS     Open Access  
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access  
Bilge International Journal of Science and Technology Research     Open Access   (Followers: 1)
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Hybrid Journal   (Followers: 11)
Biomedical Engineering     Hybrid Journal   (Followers: 11)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 10)
Biomedical Engineering Letters     Hybrid Journal   (Followers: 3)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 4)
Biomedical Microdevices     Hybrid Journal   (Followers: 8)
Biomedical Science and Engineering     Open Access   (Followers: 4)
Biomicrofluidics     Open Access   (Followers: 7)
Biotechnology Progress     Hybrid Journal   (Followers: 42)
Black Sea Journal of Engineering and Science     Open Access  
Botswana Journal of Technology     Full-text available via subscription   (Followers: 1)
Boundary Value Problems     Open Access  
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 12)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 15)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers Droit, Sciences & Technologies     Open Access   (Followers: 1)
Calphad     Hybrid Journal  
Canadian Geotechnical Journal     Hybrid Journal   (Followers: 28)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 51)
Carbon Resources Conversion     Open Access   (Followers: 2)
Carpathian Journal of Electronic and Computer Engineering     Open Access  
Case Studies in Thermal Engineering     Open Access   (Followers: 9)
Catalysis Communications     Hybrid Journal   (Followers: 7)
Catalysis Letters     Hybrid Journal   (Followers: 3)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 9)
Catalysis Science and Technology     Hybrid Journal   (Followers: 9)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 4)
Catalysis Today     Hybrid Journal   (Followers: 4)
CEAS Space Journal     Hybrid Journal   (Followers: 6)
Cell Reports Physical Science     Open Access  
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 2)
CFD Letters     Open Access   (Followers: 7)
Chaos : An Interdisciplinary Journal of Nonlinear Science     Hybrid Journal   (Followers: 3)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 1)
Chaos, Solitons & Fractals : X     Open Access   (Followers: 1)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Engineering     Open Access   (Followers: 1)
Chinese Journal of Population, Resources and Environment     Open Access  
Chinese Science Bulletin     Open Access  
Ciencia e Ingenieria Neogranadina     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencia y Tecnología     Open Access  
Ciencias Holguin     Open Access   (Followers: 1)
CienciaUAT     Open Access  
Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Hybrid Journal   (Followers: 10)
CIRP Journal of Manufacturing Science and Technology     Hybrid Journal   (Followers: 12)
City, Culture and Society     Hybrid Journal   (Followers: 23)
Clay Minerals     Hybrid Journal   (Followers: 7)
Cleaner Engineering and Technology     Open Access   (Followers: 3)
Cleaner Environmental Systems     Open Access   (Followers: 3)
Coastal Engineering     Hybrid Journal   (Followers: 15)
Coastal Engineering Journal     Hybrid Journal   (Followers: 7)
Coastal Engineering Proceedings : Proceedings of the International Conference on Coastal Engineering     Open Access   (Followers: 1)
Coastal Management     Hybrid Journal   (Followers: 29)
Cogent Engineering     Open Access   (Followers: 1)
Cognitive Computation     Hybrid Journal   (Followers: 2)
Color Research & Application     Hybrid Journal   (Followers: 1)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 18)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 21)
Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering     Open Access  
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 27)
Composite Interfaces     Hybrid Journal   (Followers: 6)
Composite Structures     Hybrid Journal   (Followers: 243)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 177)
Composites Part B : Engineering     Hybrid Journal   (Followers: 220)
Composites Part C : Open Access     Open Access   (Followers: 1)
Composites Science and Technology     Hybrid Journal   (Followers: 149)
Comptes Rendus : Mécanique     Open Access   (Followers: 2)
Computational Geosciences     Hybrid Journal   (Followers: 17)
Computational Optimization and Applications     Hybrid Journal   (Followers: 9)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 6)
Computer Science and Engineering     Open Access   (Followers: 15)
Computers & Geosciences     Hybrid Journal   (Followers: 29)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 8)
Computers and Electronics in Agriculture     Hybrid Journal   (Followers: 7)
Computers and Geotechnics     Hybrid Journal   (Followers: 11)
Computing and Visualization in Science     Hybrid Journal   (Followers: 6)
Computing in Science & Engineering     Full-text available via subscription   (Followers: 31)
Conciencia Tecnologica     Open Access  
Concurrent Engineering     Hybrid Journal   (Followers: 3)

        1 2 3 4 5 6 7 8 | Last

Similar Journals
Journal Cover
Catalysis Surveys from Asia
Journal Prestige (SJR): 0.973
Citation Impact (citeScore): 3
Number of Followers: 4  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1574-9266 - ISSN (Online) 1571-1013
Published by Springer-Verlag Homepage  [2484 journals]
  • Recent Advances for Selective Catalysis in Benzene Methylation: Reactions,
           Shape-Selectivity and Perspectives

    • Free pre-print version: Loading...

      Abstract: Benzene methylation over zeolite offers an alternative route to produce high-value toluene or para-xylene directly from benzene and C1 chemical sources, especially for countries with a shortage of crude oil but abundant coal, natural gas, or biomass. It also serves as a green “molecular engineering” to reduce costs of energy intensive separation for C8 isomers by selective catalysis. Since numerous zeolite-based catalysts have been synthesized, characterized and evaluated in alkylation process, this review aims to present the roles of the zeolite topology and acidity in selective catalysis based on the reaction network and mechanisms for benzene methylation system during the recent years. It covers concise details in the shape-selective catalysis of zeolite topology and acidity to provide a theoretical basis of the chemical modification under reaction conditions, which give directions to or identify the catalyst design for benzene methylation, and also will provide the mechanistic insights and technical reference as an integral part of other aromatics production.
      PubDate: 2021-12-01
       
  • PtPd/TiO2 Catalysts for Low‐Temperature Toluene Oxidation

    • Free pre-print version: Loading...

      Abstract: The preparation of atomically dispersed catalysts with high metal loading remains a formidable challenge due to the high surface energy of single atoms. Here we prepared PtPd/TiO2 catalysts possessing metal loading as high as 8.17 wt% by a new versatile method which based on metal oxide carriers with abundant oxygen defects. PtPd/TiO2 catalysts consist of PtPd nanoparticles and atomically dispersed Pt and Pd atoms, and the content of PtPd nanoparticles is little. Pt3Pd1/TiO2-400 catalyst exhibited the highest catalytic activity in toluene oxidation, and with a 94.7% conversion at 110 °C. Kinetic investigation reveals that the toluene oxidation follows a typical Langmuir-Hinshelwood mechanism. Experimental research indicates that the superior catalytic activity could be attributed to a large number of metal atoms atomically dispersed on the surface of the catalyst. Pt and Pd atoms are close to each other, which produces the synergetic effect and thereby promotes toluene oxidation. This work provides a promising pathway to fabricate single atom catalysts with high loading.
      PubDate: 2021-12-01
       
  • Synthesis of Pd-Based Bimetallic Nanoparticles and Their Effective
           Electrocatalytic Properties

    • Free pre-print version: Loading...

      Abstract: In this work, we developed a simple and effective one-pot method to synthesize the Pd-based bimetallic nanoparticles (NPs) in the presence of polyvinylpyrrolidone (PVP). By using high-resolution transmission electron microscopy (HRTEM), energy-dispersive spectrometry (EDS) mapping and X-ray diffraction (XRD), the morphologies and compositions of the as-prepared bimetallic NPs were investigated in detail. Furthermore, this approach was also used to achieve the highly dispersive Pd-based bimetallic NPs directly on the carbon black. Significantly, the as-obtained carbon-supported Pd-based bimetallic NPs showed excellent electrocatalytic activity for the methanol oxidation. Among the Pd-based bimetallic NPs and the commercial Pd–C, the PdPt–C displayed the best electrocatalytic activity and stability, which may be mainly attributed to the specific nanostructure and the synergetic effect between Pt and Pd atoms.
      PubDate: 2021-12-01
       
  • Synthesis of Rod-Like Co3O4 Catalyst Derived from Co-MOFs with Rich Active
           Sites for Catalytic Combustion of Toluene

    • Free pre-print version: Loading...

      Abstract: Co3O4 catalyst derived from Co-MOFs demonstrated rich active sites in the catalytic reaction. In this paper, we prepared the rod-like Co3O4 catalysts by calcining Co-MOFs, which were synthesized by the solvothermal reaction of cobalt nitrate and diverse spatial structure linkers (L3, L4, and L5). Typically, the linkers with different spatial structures (L3, L4, and L5) were synthesized from p-aminobenzoic acid and tetracarboxylic anhydride with different structures (naphthalene-1,4,5,8-tetracarboxylic anhydride, benzene-1,2,4,5-tetracarboxylic anhydride, and perylene-3,4,9,10-tetracarboxylic anhydride). According to the BET analysis, the average pore size of Co3O4 increased with the increase of the linker spatial structure. However, the specific surface area of three Co3O4 increased at first, and then decreased with the increase spatial structure of the linker. Among three Co3O4 catalysts, the Co3O4-L3 exhibited the highest specific surface area. The Co3O4-L3 emerged with superior performance and stability for the catalytic combustion reaction of toluene due to large specific surface area, high redox capacity, plentiful surface active sites, and rich active adsorbed oxygen.
      PubDate: 2021-11-26
       
  • First-Principles Studies of the Adsorption and Catalytic Properties for
           

    • Free pre-print version: Loading...

      Abstract: The adsorption properties for some gas molecules (H2, N2, CO, NO and CO2) on pristine and transition metal-doped h-BN monolayer are investigated by using density functional theory (DFT) calculations. In contrast with N vacancy (VN) substrates, those with B vacancy (VB) are more easily doped with metal atoms, among which Ti atom doping shows the lowest binding energy. For the adsorption of these gas molecules, NO is most easily adsorbed on h-BN monolayer with metal dopants, especially Pt doped system yields the lowest adsorption energy of NO. Since a NO molecule on Pt doped h-BN monolayer could not be directly decomposed into Oads and Nads due to the high reaction energy barrier (≈ 2.00 eV), the (NO)2 dimmer can interact with Pt to form a five-membered ring or a four-membered ring through two different Langmuir–Hinshelwood (LH) mechanisms for NO reduction catalytic reaction, respectively. The LH1 reaction process needs to overcome relatively lower energy barriers, while the product of the LH2 mechanism has a more stable structure. For the catalytic process of CO oxidation, the remained Oads can bind with CO and form CO2, by overcoming a much lower energy barrier of only 0.14 eV. It seems that Pt doping can enhance the adsorb capacity of h-BN monolayer for the gas molecules and the potential catalytic activity for electrochemical reduction of NO.
      PubDate: 2021-11-05
       
  • Modified TiO2-rGO Binary Photo-Degradation Nanomaterials: Modification,
           Mechanism, and Perspective

    • Free pre-print version: Loading...

      Abstract: As a set of photocatalyst and its co-catalyst with exceptional photo-degradation performance, rGO exhibits a conspicuous board-spectrum sensitization effect to TiO2. It has been widely recognized by studies in the field of water treatment that, their synergistic can also markedly complement short carrier lifetime and other shortcomings of TiO2. Over the years, research conducted on TiO2-rGO binary composite material manifests its wide modifiable space for seeking a better degradation performance and a higher solar availability. We presents an overview study on the latest modification methods of the TiO2-rGO binary composite material and divide them into categories. This article focuses on the four of them as follows: morphology and crystalline engineering, doping modification, semiconductor ternary combination, noble-metal decoration. Furthermore, the in-depth degradation mechanism and novel structure design of the modified TiO2-rGO binary composite materials are reviewed. Ongoing difficulties and promising opportunities have been summarized and expected in this article, aiming to guide the design and study of the future photo-degradation nanomaterial.
      PubDate: 2021-10-18
       
  • Polyoxometalates and Metal–Organic Frameworks Based Dual-Functional
           Catalysts for Detoxification of Bis(2-Chloroethyl) Sulfide and
           Organophosphorus Agents

    • Free pre-print version: Loading...

      Abstract: The bis(2-chloroethyl) sulfide, commonly named sulfur mustard, as a vesicant agent and the tabun, sarin, soman, and venomous X as organophosphorus nerve agents are the most notorious, used, and threatening chemical warfare agents which contamination by them make serious health problems. The most efficient method for sulfur mustard detoxification is its selective oxidation to its corresponding sulfoxide, which is a nontoxic product. While for organophosphorus nerve agents, the best strategy is the hydrolysis of their P–X bond. Various mono-functional catalysts have been introducing regarding these methods. In other words, they are only able to selective oxidation of sulfur mustard or hydrolysis of organophosphorus nerve agents or their simulants. However, due to the unpredictable use of these chemical warfare agents, for human and environmental safety, there is a need for dual-functional catalysts capable of both the selective oxidation of sulfur mustard and hydrolysis of organophosphorus agents. In this regard, the reported dual-functional catalysts for oxidation of sulfur mustard and hydrolysis of organophosphorus agents, or their simulants, are reviewed here. These catalysts are mainly polyoxometalates and minorly metal-organic frameworks based catalysts. Graphic
      PubDate: 2021-09-25
      DOI: 10.1007/s10563-021-09347-3
       
  • A Review on Synthesis and Transformation of Ethanol into Olefins Using
           Various Catalysts

    • Free pre-print version: Loading...

      Abstract: Over the past couple of years, fossil fuel consumption has been increased significantly. Today the consumption of coal, natural gas, and oil is rising continuously worldwide. In contrast to fossil fuels, biofuels can be advantageous because of their eco-friendly behavior with the environment. Ethanol is the “green” substitute for gasoline, as it can be blended with gasoline or can be used for the production of lighter olefins (ethylene and propylene). Ethanol can be produced either by fermentation or by catalytic route from various sources such as sugar/starchy material, carbon dioxide, carbon monoxide, and dimethylether. The catalytic route has emerged as the better route compared to fermentation due to the requirement of a large number of crops which is generally not suitable for every country. The study of ethanol synthesis and the catalytic transformation of ethanol to lighter olefins such as ethylene and propylene is presented in this review. The effect of catalysts such as zirconia, alumina, and zeolites in the ethanol transformation to olefins has been discussed in detail. Graphic
      PubDate: 2021-09-25
      DOI: 10.1007/s10563-021-09348-2
       
  • The Structure and Catalytic Properties of MoVTeNbO Catalysts Modified by
           Adding Cr, Fe, Ce and W

    • Free pre-print version: Loading...

      Abstract: Cr, Fe, Ce and W doped MoVTeNbO M2 phase catalysts were synthesized and used in the selective oxidation of propylene to acrylic acid (AA). Results show that the introduction of Cr, Fe, Ce and W substantially affects the physicochemical properties and catalytic performance of MoVTeNbO-based catalysts. Un-doped catalyst consists of M2 phase and TeO2, while Cr, Fe, Ce and W-doped catalysts are mainly composed of M2 and MoO3. It is indicated that doping of Cr, Fe, Ce and W can restrain the formation of TeO2, but favour the formation of MoO3. Un-doped, Cr and W-doped catalysts display irregular-shaped particles morphology, while Fe and Ce-doped catalysts display nanosheets morphology. In addition, the valence of superficial elements of catalysts changed greatly with the doping elements. For catalytic performance, in addition to Cr, the propylene conversion of the catalyst decreases obviously with doping of other elements, probably due to the drastically reduced specific surface area with doping of Fe, Ce and W. The existence of Cr and Ce can increase the selectivity to AA at all test temperatures (360–440 ℃), while Fe and W-doped catalysts only show higher selectivity than the un-doped one at high temperature of 420 and 440 ℃. It is illustrated that the catalysts with redox ability at relatively low temperature is more favorable for the selectivity to AA. Among them, Cr-doped catalyst shows the highest selectivity (85.3%) and yield (63.5%) of AA at test temperature of 380 ℃, which are 15.3 and 7.5% higher than that of un-doped catalyst, respectively. Graphic The M2 phase MoVTeNbO catalysts doped with Cr, Fe, Ce and W have been synthesized. It is demonstrated that the addition of Cr improves the stability of Te4+, and Cr-doped M2 phase shows excellent catalytic performance in the selective oxidation of propylene to acrylic acid.
      PubDate: 2021-09-20
      DOI: 10.1007/s10563-021-09346-4
       
  • Design of Water-Tolerant Solid Acids: A Trade-Off Between Hydrophobicity
           and Acid Strength and their Catalytic Performance in Esterification

    • Free pre-print version: Loading...

      Abstract: Water, as a byproduct in esterification, tends to adsorb on solid acid catalysts, causing loss of active components or decomposition of framework and thereby decreasing their reactivity and durability, while the development of water-tolerant solid acids is expected to solve these problems. In this review, the recent developments of major kinds of water-tolerant solid acids including zeolite, mesoporous silica, metal organic framework-based catalyst, magnetic nanoparticles, and polymeric catalyst are discussed in detail. Special attention has been paid to understand the role of hydrophobicity, acid strength, and structure of water-tolerant solid acids in catalytic performance and their stability. From the literature survey, it is found that despite the modified zeolites have a water contact angle as large as 160°, but their acid strength need to be improved and their small micropore sizes restrict their use in catalyzing the esterification of bulky molecules. In contrast, solid acids with abundant acid sites, suitable hydrophobicity, and abundant mesopores or macropores usually exhibit high activity and reusability. Among all the known solid acids, polystyrene-supported acidic ionic liquid catalysts (PS-CH2-[SO3H-pIM] [HSO4]) show a high yield of n-butyl acetate with 99.1% and high reusability of 13 times, which is a breakthrough over the traditional. This review aims to offer a comprehensive understanding for the water-tolerant solid acid catalysts in esterification. Graphic
      PubDate: 2021-09-01
      DOI: 10.1007/s10563-021-09334-8
       
  • Dehydrogenation of Formic Acid in Liquid Phase over Pd Nanoparticles
           Supported on Reduced Graphene Oxide Sheets

    • Free pre-print version: Loading...

      Abstract: Reduced graphene oxide sheets (rGO) were used in this study to support Pd nanoparticles through soil-immobilization and impregnation methods. The catalysts were characterised using X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive X-ray (EDX), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. These nanocatalysts were used as catalysts for the dehydrogenation of formic acid in liquid phase. The results showed that the Pd/rGO samples synthesised via the sol-immobilisation technique exhibited better catalytic activity (TOF = 910 h−1) than those synthesised by the impregnation technique (TOF = 506 h−1) because of the smaller size of Pd particles and higher Pd exposure of the catalysts synthesised by the first technique. The experimental outcomes showed that the graphene sheets provided remarkable support for Pd nanoparticles.
      PubDate: 2021-09-01
      DOI: 10.1007/s10563-021-09332-w
       
  • The Effects of Surface Modification of ATP on the Performance of
           CeO2–WO3/TiO2 Catalyst for the Selective Catalytic Reduction of NOx with
           NH3

    • Free pre-print version: Loading...

      Abstract: A series of CeO2–WO3/20%ATP-TiO2 catalysts were synthesized, of which attapulgite (ATP) was modified by different methods. Notably, after ATP was dissociated and acidified, the catalyst synthesized by the impregnation method exhibited satisfactory performance for selective catalytic reduction (SCR) NOx with NH3. In more detail, the NO conversion could reach to 88% at 240 °C and maintain above 93% in the temperature range of 280–400 °C. Subsequently, the NO conversion of the best catalyst could keep above 80% after introducing H2O and SO2, so this catalyst also had strong tolerance to H2O and SO2 performance. Besides, the results of XRD, XPS, TEM characterizations suggested that the high dispersion of active species cerium and tungsten on the surface of ATP, which played an important role in improving the SCR performance of the catalyst. In short, the surface dissociation and surface acidification of a small amount of ATP carrier can improve the catalyst catalytic performance, so it will have a broad application prospect in SCR reaction.
      PubDate: 2021-09-01
      DOI: 10.1007/s10563-021-09330-y
       
  • Organic Reactions Using Clay and Clay-Supported Catalysts: A Survey of
           Recent Literature

    • Free pre-print version: Loading...

      Abstract: Clays and modified or supported clays have become some of the widely used catalysts for a variety of organic reactions, due to their easy structural modifications and activation, low-cost, eco-friendly nature, ready availability, ability to act as acidic or basic catalyst without being corrosive. The present review is a survey of the literature dealing with most of the important work on clay catalysed organic reactions published during the period 2011–2020, and is a sequel to our previous review covering the literature of 2001–2010. The review consists of various segments starting with introduction that briefly mentions the structure and modification of clay minerals, particularly the most widely used montmorillonite, followed by organic reactions such as condensation, addition, substitution, elimination, reduction, oxidation, wastewater remediation, biodiesel synthesis and a few miscellaneous reactions that are accomplished using these catalysts. Among these, biodiesel synthesis and remediation are widely investigated transformations, and find practical applications. Graphical
      PubDate: 2021-09-01
      DOI: 10.1007/s10563-021-09333-9
       
  • Synthesis of Highly-Dispersed Ni/Mesoporous Silica via an Ammonia
           Evaporation Method for Dry Reforming of Methane: Effect of the Ni Loadings
           

    • Free pre-print version: Loading...

      Abstract: Mesoporous silica was used in conjunction with the ammonia evaporation method to prepare highly dispersed Ni catalysts for the dry reforming of methane (DRM). The effect of Ni dispersion on the catalytic performance was investigated by applying different Ni loadings. The pore structure, morphology, Ni dispersion, catalytic activity for DRM as well as the coke resistance were investigated. During the reaction at a relatively low temperature of 600 °C, all the three catalysts exhibited high stability in CH4 and CO2 conversion and excellent coke resistance, in comparison to Ni/SiO2 catalyst prepared by the incipient wetness method. Among them, 10% Ni–SiO2 exhibited the best catalytic performance with the maximum steady conversions of 62% and 69% for CH4 and CO2 at 600 °C, which was beneficial from its optimal Ni content and the presence of highly-dispersed metal nanoparticles confined in the mesopores.
      PubDate: 2021-09-01
      DOI: 10.1007/s10563-021-09331-x
       
  • Morphology Controllable Fabrication of Tungsten Oxide for Enhanced
           Photocatalytic Performance

    • Free pre-print version: Loading...

      Abstract: Exploring the morphology-property relationship is an important role in addressing the mechanism of hydrogen production. In this work, WO3 photocatalysts with different morphology were prepared via a solvothermal method. Our first prepared porous WO3 with the exposed (100) crystal plane, the WO3 porous nano disk demonstrates a better photocatalytic activity, which is higher than the WO3 nanorod, WO3 nanoflower and WO3 nano block. Further characterizations indicate the WO3 porous nano disk exhibits high absorption capacity and active lattice structure. Meanwhile, with the introduction of non-noble metal Ni as the co-catalyst, the photocatalytic H2 evolution was enhanced. This work reveals the importance of regulating surface atomic configuration and catalytic active sites, opens a new avenue for the development of solar-driven water splitting.
      PubDate: 2021-09-01
      DOI: 10.1007/s10563-021-09336-6
       
  • Amorphous Manganese–Cobalt Nanosheets as Efficient Catalysts for
           Hydrogen Evolution Reaction (HER)

    • Free pre-print version: Loading...

      Abstract: A facile and efficient electrocatalyst for hydrogen evolution reaction (HER) to produce hydrogen is very important for future energy. In this paper, amorphous manganese–cobalt nanosheets are successfully prepared by electrospinning on a foamed nickel substrate. It is found that the manganese (Mn) introduction in manganese–cobalt composites can simultaneously enhance their electrocatalytic performances. As a result, benefitting from the 3D structure, the self-supported Mn–Co hydroxides exhibits unprecedented HER activity with a relatively low overpotential of 100 mV at 10 mA cm−2 and has a possibility for the large-scale production of hydrogen. Graphic Amorphous PVP/Mn4Co nanofibers formed by electrospinning on Ni foam (NF) has remarkable catalytic activity and stability for HER after operation for 6 h in 1 M KOH, with a low overpotential of 0.1 V at 100 mA cm−2, a low Tafel slope of 65.4 mV dec−1.
      PubDate: 2021-08-18
      DOI: 10.1007/s10563-021-09342-8
       
  • Ni/LaBO3 (B = Al, Cr, Fe) Catalysts for Steam Reforming of Methane
           (SRM): On the Interaction Between Ni and LaBO3 Perovskites with Differed
           Fine Structures

    • Free pre-print version: Loading...

      Abstract: With the target to fabricate more feasible catalysts for SRM to produce hydrogen, the interaction between Ni and LaBO3 (B = Al, Cr and Fe) perovskite supports with different B-sites has been explored. To avoid the formation of big Ni grains, the Ni loading is intentionally set as low as 2 wt%. XRD and Raman results revealed that the three LaBO3 supports are composed of pure perovskite phase, but have differed fine crystal structures. While LaFeO3 and LaCrO3 can be indexed to the orthorhombic perovskite phase, LaAlO3 can be indexed to the hexagonal phase. H2-TPR and XPS results have validated that NiO has varied interfacial interactions with the LaBO3 supports through partial electron transfer from the supports to Ni. As a consequence, the active metallic Ni surface areas are in the order of 2%Ni/LaAlO3 > 2%Ni/LaCrO3 > 2%Ni/LaFeO3, well consistent with the reaction performance. Furthermore, by varying the B-site element, the abundance of the active surface oxygen species (mainly O22−) is varied, obeying the sequence of 2%Ni/LaCrO3 > 2%Ni/LaAlO3 > 2%Ni/LaFeO3, well consistent with the anti-coking ability of the catalysts. It is discovered that the change of the fine crystal structure of LaBO3 supports can influence the SRM performance of the 2%Ni/LaBO3 catalysts evidently. The reaction performance of the catalysts is mainly determined by the active Ni surface area, but the anti-coking ability is majorly decided by the amount of active oxygen species.
      PubDate: 2021-08-17
      DOI: 10.1007/s10563-021-09343-7
       
  • Techniques for Overcoming Sulfur Poisoning of Catalyst Employed in
           Hydrocarbon Reforming

    • Free pre-print version: Loading...

      Abstract: Sulfur poisoning of catalyst is a well-known phenomenon observed during the production of syngas (CO + H2). The presence of traces of sulfur content in the feedstock can drastically reduce the catalyst activity and life. Several measures have been developed over the years to mitigate the catalyst deactivation process due to sulfur poisoning. In this paper, we review literature from 1996-present related to all the developments made for sulfur-resistant systems. The basis of poisoning being the sulfur content in the feedstock, potential fuel-containing feedstocks for syngas production were briefly discussed. The basics of sulfur poisoning mechanisms are also summarized. Then, a framework consisting of sulfur tolerance methodologies were discussed. In particular, we have discussed: (i) catalyst development by altering catalyst composition and support systems, (ii) influence of using catalyst structures, (iii) process modifications and optimization, (iv) desulfurization techniques for removal of sulfur from feed and/or product streams, and (v) effective catalyst regeneration techniques to extend the catalyst life. This review emphasizes the integration of the best set of methods to develop sulfur tolerance strategies.
      PubDate: 2021-08-07
      DOI: 10.1007/s10563-021-09340-w
       
  • Amine-Iodine Adducts as Simple but Effective Catalysts for the Synthesis
           of Organic Carbonates from Epoxides and CO2

    • Free pre-print version: Loading...

      Abstract: New catalysts prepared by simple mixing of molecular iodine and inexpensive monodonor amines can efficiently catalyze the coupling of CO2 with different epoxides at moderate temperatures (60–90 °C), pressures (10–56 atm) and low (0.25–0.5 mol %) catalytic loading. The molecular systems can be considered as the simplest and most inexpensive catalyst for the reactions. Graphic
      PubDate: 2021-08-06
      DOI: 10.1007/s10563-021-09341-9
       
  • Coupling of Propane with CO2 to Propylene Catalyzed by V–Fe Modified
           KIT-6 Zeolites

    • Free pre-print version: Loading...

      Abstract: Propane dehydrogenation to propene is an endothermic reaction and CO2 hydrogenation to light olefins is an exothermic reaction. Using the CO2 hydrogenation reaction to consume the hydrogen from the propane dehydrogenation reaction, which is more favorable to propylene formation. A new method for coupling propane and CO2 to propylene is presented. The V–Fe modified KIT-6 was prepared by the ultrasonic-assisted impregnation method and used for coupling reaction of propane with CO2 to propylene. Exploring the relationship between catalytic properties and physicochemical characteristics through several characterization methods. As the appropriate amounts of V and Fe species were introduced into the framework of KIT-6, V–Fe modified KIT-6 performed large specific surface area, a highly ordered mesoporous structure and highly dispersed V and Fe active sites. The catalysis performance of V–Fe modified KIT-6 zeolites for production of propylene by propane dehydrogenation, CO2 hydrogenation and coupling reaction of C3H8 with CO2 was compared. Under the conditions of C3H8/CO2/N2 = 1:4:5, total flow rate = 20 mL/min, the temperature at 580 °C, the reaction pressure at 0.1 MPa, V/Fe molar ratio = 2 and the catalyst mass of 0.2 g, the propane conversion, propylene selectivity and yield are 37.8%, 87.0% and 32.9%, respectively. Graphic
      PubDate: 2021-06-08
      DOI: 10.1007/s10563-021-09339-3
       
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
 


Your IP address: 3.81.172.77
 
Home (Search)
API
About JournalTOCs
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-