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ENGINEERING (1240 journals)                  1 2 3 4 5 6 7 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 8)
3D Research     Hybrid Journal   (Followers: 20)
AAPG Bulletin     Hybrid Journal   (Followers: 8)
AASRI Procedia     Open Access   (Followers: 14)
Abstract and Applied Analysis     Open Access   (Followers: 3)
Aceh International Journal of Science and Technology     Open Access   (Followers: 2)
ACS Nano     Full-text available via subscription   (Followers: 264)
Acta Geotechnica     Hybrid Journal   (Followers: 7)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 6)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 3)
Acta Scientiarum. Technology     Open Access   (Followers: 3)
Acta Universitatis Cibiniensis. Technical Series     Open Access  
Active and Passive Electronic Components     Open Access   (Followers: 7)
Adaptive Behavior     Hybrid Journal   (Followers: 11)
Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi     Open Access  
Adsorption     Hybrid Journal   (Followers: 4)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 7)
Advanced Science     Open Access   (Followers: 5)
Advanced Science Focus     Free   (Followers: 5)
Advanced Science Letters     Full-text available via subscription   (Followers: 9)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 18)
Advances in Calculus of Variations     Hybrid Journal   (Followers: 2)
Advances in Catalysis     Full-text available via subscription   (Followers: 5)
Advances in Complex Systems     Hybrid Journal   (Followers: 6)
Advances in Engineering Software     Hybrid Journal   (Followers: 27)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 15)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 13)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 21)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 23)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 9)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 29)
Advances in Operations Research     Open Access   (Followers: 12)
Advances in OptoElectronics     Open Access   (Followers: 5)
Advances in Physics Theories and Applications     Open Access   (Followers: 13)
Advances in Polymer Science     Hybrid Journal   (Followers: 43)
Advances in Porous Media     Full-text available via subscription   (Followers: 5)
Advances in Remote Sensing     Open Access   (Followers: 43)
Advances in Science and Research (ASR)     Open Access   (Followers: 4)
Aerobiologia     Hybrid Journal   (Followers: 2)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 6)
AIChE Journal     Hybrid Journal   (Followers: 35)
Ain Shams Engineering Journal     Open Access   (Followers: 5)
Akademik Platform Mühendislik ve Fen Bilimleri Dergisi     Open Access   (Followers: 1)
Alexandria Engineering Journal     Open Access   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 26)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 10)
American Journal of Engineering Education     Open Access   (Followers: 9)
American Journal of Environmental Engineering     Open Access   (Followers: 16)
American Journal of Industrial and Business Management     Open Access   (Followers: 23)
Analele Universitatii Ovidius Constanta - Seria Chimie     Open Access  
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Pure and Applied Logic     Open Access   (Followers: 2)
Annals of Regional Science     Hybrid Journal   (Followers: 7)
Annals of Science     Hybrid Journal   (Followers: 7)
Antarctic Science     Hybrid Journal   (Followers: 1)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applicable Analysis: An International Journal     Hybrid Journal   (Followers: 1)
Applied Catalysis A: General     Hybrid Journal   (Followers: 6)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 18)
Applied Clay Science     Hybrid Journal   (Followers: 5)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 11)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4)
Applied Nanoscience     Open Access   (Followers: 8)
Applied Network Science     Open Access   (Followers: 3)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Physics Research     Open Access   (Followers: 4)
Applied Sciences     Open Access   (Followers: 3)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4)
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 5)
Archives of Foundry Engineering     Open Access  
Archives of Thermodynamics     Open Access   (Followers: 8)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
ASEE Prism     Full-text available via subscription   (Followers: 3)
Asia-Pacific Journal of Science and Technology     Open Access  
Asian Engineering Review     Open Access  
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 1)
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 Current Engineering & Maths     Open Access  
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 8)
Assembly Automation     Hybrid Journal   (Followers: 2)
at - Automatisierungstechnik     Hybrid Journal   (Followers: 1)
ATZagenda     Hybrid Journal  
ATZextra worldwide     Hybrid Journal  
Australasian Physical & Engineering Sciences in Medicine     Hybrid Journal   (Followers: 1)
Australian Journal of Multi-Disciplinary Engineering     Full-text available via subscription   (Followers: 2)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 9)
Avances en Ciencias e Ingeniería     Open Access  
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 1)
Bangladesh Journal of Scientific and Industrial Research     Open Access  
Basin Research     Hybrid Journal   (Followers: 5)
Batteries     Open Access   (Followers: 6)
Bautechnik     Hybrid Journal   (Followers: 1)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 26)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 4)
BER : Manufacturing Survey : Full Survey     Full-text available via subscription   (Followers: 1)
BER : Motor Trade Survey     Full-text available via subscription  
BER : Retail Sector Survey     Full-text available via subscription   (Followers: 1)
BER : Retail Survey : Full Survey     Full-text available via subscription   (Followers: 1)
BER : Survey of Business Conditions in Manufacturing : An Executive Summary     Full-text available via subscription   (Followers: 2)
BER : Survey of Business Conditions in Retail : An Executive Summary     Full-text available via subscription   (Followers: 3)
Bhakti Persada : Jurnal Aplikasi IPTEKS     Open Access  
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Biofuels Engineering     Open Access   (Followers: 1)
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 10)
Biomedical Engineering     Hybrid Journal   (Followers: 15)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 13)
Biomedical Engineering Letters     Hybrid Journal   (Followers: 5)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 19)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 35)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 9)
Biomedical Science and Engineering     Open Access   (Followers: 4)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal  
Biomicrofluidics     Open Access   (Followers: 4)
BioNanoMaterials     Hybrid Journal   (Followers: 2)
Biotechnology Progress     Hybrid Journal   (Followers: 39)
Boletin Cientifico Tecnico INIMET     Open Access  
Botswana Journal of Technology     Full-text available via subscription   (Followers: 1)
Boundary Value Problems     Open Access   (Followers: 1)
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 13)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 14)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers, Droit, Sciences et Technologies     Open Access  
Calphad     Hybrid Journal  
Canadian Geotechnical Journal     Hybrid Journal   (Followers: 31)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 42)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 6)
Case Studies in Thermal Engineering     Open Access   (Followers: 5)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 7)
Catalysis Science and Technology     Free   (Followers: 8)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysis Today     Hybrid Journal   (Followers: 7)
CEAS Space Journal     Hybrid Journal   (Followers: 2)
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 3)
Central European Journal of Engineering     Hybrid Journal  
CFD Letters     Open Access   (Followers: 6)
Chaos : An Interdisciplinary Journal of Nonlinear Science     Hybrid Journal   (Followers: 2)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Engineering     Open Access   (Followers: 2)
Chinese Science Bulletin     Open Access   (Followers: 1)
Ciencia e Ingenieria Neogranadina     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencias Holguin     Open Access   (Followers: 2)
CienciaUAT     Open Access   (Followers: 1)
Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Full-text available via subscription   (Followers: 11)
CIRP Journal of Manufacturing Science and Technology     Full-text available via subscription   (Followers: 13)
City, Culture and Society     Hybrid Journal   (Followers: 20)
Clay Minerals     Full-text available via subscription   (Followers: 10)
Clean Air Journal     Full-text available via subscription   (Followers: 1)
Coal Science and Technology     Full-text available via subscription   (Followers: 3)
Coastal Engineering     Hybrid Journal   (Followers: 11)
Coastal Engineering Journal     Hybrid Journal   (Followers: 5)
Coatings     Open Access   (Followers: 4)
Cogent Engineering     Open Access   (Followers: 2)
Cognitive Computation     Hybrid Journal   (Followers: 4)
Color Research & Application     Hybrid Journal   (Followers: 2)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 14)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 13)
Communications Engineer     Hybrid Journal   (Followers: 1)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 28)
Composite Interfaces     Hybrid Journal   (Followers: 7)
Composite Structures     Hybrid Journal   (Followers: 270)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 208)
Composites Part B : Engineering     Hybrid Journal   (Followers: 245)
Composites Science and Technology     Hybrid Journal   (Followers: 182)
Comptes Rendus Mécanique     Full-text available via subscription   (Followers: 2)
Computation     Open Access  
Computational Geosciences     Hybrid Journal   (Followers: 15)
Computational Optimization and Applications     Hybrid Journal   (Followers: 7)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 8)
Computer Science and Engineering     Open Access   (Followers: 19)
Computers & Geosciences     Hybrid Journal   (Followers: 30)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 8)
Computers and Electronics in Agriculture     Hybrid Journal   (Followers: 5)
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: 33)
Conciencia Tecnologica     Open Access  
Concurrent Engineering     Hybrid Journal   (Followers: 3)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 8)
Control and Dynamic Systems     Full-text available via subscription   (Followers: 9)
Control Engineering Practice     Hybrid Journal   (Followers: 43)
Control Theory and Informatics     Open Access   (Followers: 8)
Corrosion Science     Hybrid Journal   (Followers: 25)

        1 2 3 4 5 6 7 | Last

Journal Cover Catalysis Surveys from Asia
  [SJR: 0.784]   [H-I: 40]   [3 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1574-9266 - ISSN (Online) 1571-1013
   Published by Springer-Verlag Homepage  [2352 journals]
  • Efficient Catalytic Removal of Formaldehyde over Ag/Co 3 O 4 –CeO 2
           Prepared by Different Method
    • Authors: Suhong Lu; Canchang Chen; Xue Wang; Shuhan Wei; Qinyu Zhu; Fenglin Huang; Kelun Li; Xuefeng Zhou; Lulu He; Yanxiong Liu; Fanjue Pang
      Abstract: A series of Co3O4–CeO2 supported Ag catalysts were prepared by different methods and the catalytic properties of these catalysts were investigated for the catalytic removal of formaldehyde (HCHO). The Ag/Co3O4–CeO2–H catalyst calcined in a O2/N2 flow and then reduced in a H2/N2 stream exhibited excellent catalytic activity, over which 100% HCHO conversion was achieved at a temperature as low as 60 °C. In addition, the Ag/Co3O4–CeO2–H catalyst also displayed high stability in lifetime testing. Based on a variety of physical–chemical characterization results, it is demonstrated that the larger specific area, easier reducibility and abundant active surface oxygen species served as essential roles in the catalytic removal of HCHO for Ag/Co3O4–CeO2–H catalyst.
      PubDate: 2018-02-05
      DOI: 10.1007/s10563-018-9240-y
  • An Overview of Metal Acetylacetonates: Developing Areas/Routes to New
           Materials and Applications in Organic Syntheses
    • Authors: Ravinderpal Kour Sodhi; Satya Paul
      Abstract: In this review, we discuss the nature and bonding, role of metal acetylacetonates as precursors for nanoparticle research, polymer science, catalysis and their mechanistic aspects, which we believe to provide an illustrative overview of current research directions in this rapidly developing field. The chosen examples within this review reflect the remarkable broadness of nanoparticle research, polymer and applications of metal acetylacetonates as catalysts in organic syntheses. The purpose of this review is to provide recent advancements of several catalytic reactions employing well defined metal enolate complexes. Metal enolates are used in a plethora of catalysed reactions. Several catalytic reactions have been highlighted in this review to show where metal enolate complexes have played a significant role in recent years. The ultimate goal of this effort is towards the development of catalysts that impart the selectivities, reactivity, and atom economy needed for cost-effective approaches to a variety of critical chemical transformations. Graphical
      PubDate: 2017-12-30
      DOI: 10.1007/s10563-017-9239-9
  • High-Efficiency Environmental-Friendly Fe–W–Ti Catalyst for Selective
           Catalytic Reduction of NO with NH 3 : The Structure–Activity
    • Authors: Kun Zhao; Weiliang Han; Zhicheng Tang; Jiangyin Lu; Xun Hu
      Abstract: Iron-based catalysts are nontoxic and have outstanding medium-temperature activity, which are considered as potential catalysts for the selective catalytic reduction of NOx with NH3 (NH3-SCR). In this work, Fe (0.2)-W (0.05)-Ti catalyst prepared by deposition–precipitation exhibited over 90% NOx conversion within the range of 280–420 °C and excellent resistance to SO2 or H2O. The excellent catalytic performance was due to the high proportion of Fe2+/(Fe2+ + Fe3+) and Oads/(Oads + Olat) ratio and abundant surface acid sites. However, the catalyst lost part low-temperature catalytic performance after hydrothermal aging at 670 °C for 64 h. The surface area, proportion of Fe2+/(Fe2+ + Fe3+) and Oads/(Oads + Olat) decreased significantly after aged. As a result, the lack of sufficiently active site to produce NO2 resulted in the significant decrease for NOx conversion at low-temperature section. Simultaneously, the decline of the surface acidity, especially the strong acid, meant that the adsorption capacity of the catalyst under high temperature weakened and the NO conversion corresponding declined.
      PubDate: 2017-12-02
      DOI: 10.1007/s10563-017-9238-x
  • Recent Progress on Establishing Structure–Activity Relationship of
           Catalysts for Selective Catalytic Reduction (SCR) of NO x with NH 3
    • Authors: Xiaosheng Huang; Guodong Zhang; Gongxuan Lu; Zhicheng Tang
      Abstract: Catalytic elimination is an important technique to reduce the emission of atmospheric molecular contaminants (such as NOx) efficiently. Selective catalytic reduction (SCR) is one of the most important nitrogen oxide (NOx) control technologies in the world, and catalyst plays a greatly important role in SCR process. In this field, the novel catalysts and preparation methods have attracted more and more attention in recent years due to their excellent catalytic performance. It is well accepted that catalytic performance is significantly dependent on the supports, active sites, and interaction of support and active component of the catalysts. In this paper, we present a brief review on the preparation methods of different kinds of SCR catalysts in recent years and propose some perspectives for further development. Based on the report of published literatures, the structure–activity relationship between support and active sites is deeply analyzed. Meanwhile, we review the possible catalytic mechanism, and further clarify the nature of the catalytic reactions.
      PubDate: 2017-11-14
      DOI: 10.1007/s10563-017-9237-y
  • Theoretical Investigation of Reverse Water Gas Shift Reaction Catalyzed by
           Ruthenium Halogen Carbonyl Complexes
    • Authors: Wenli Li; Sibei Guo; Ling Guo
      Abstract: In this paper we present theoretical study of the reverse water gas shift (RWGS) reaction catalyzed by ruthenium halogen carbonyl complexes. Three mechanisms, including hydrogen chloride, formic acid and oxidation–reduction mechanism, have been explored by density functional theory. The calculations indicate that the oxidation–reduction mechanism contributes to the TDI and TDTS in the ESM TOF calculations. Bimetallic catalysts would be likely to be more highly active than monometallic catalyst for the RWGS reaction. Among bimetallic catalysts studied, both bimetallic catalysts [Ru(μ-Cl)Cl(CO)3]2 and [Ru(μ-CO)Cl(CO)3]2 shows higher activity than [Ru(μ-Cl)(CO)4]2 catalyst with [Ru(μ-CO)Cl(CO)3]2 considering as the most efficient catalyst for RWGS reaction.
      PubDate: 2017-09-22
      DOI: 10.1007/s10563-017-9236-z
  • Production of Biodiesel Through Esterification Reaction Using Choline
           Exchanging Polytungstoboronic Acids as Temperature-Responsive Catalysts
    • Authors: Siqi Yan; Tong Tong; Yue Li; Shifa Ullah Khan; Jing Zhao; Shengtian Wang; Xiaohong Wang
      Abstract: High proton content polytungstoboronic acid H7BW11TiO40 (abbreviated as H7BW11Ti) had been prepared through titanium mono-substituted of H5BW12O40, which was evaluated in esterification of palmitic acid with methanol. H7BW11Ti could promote esterification reaction with almost 100% conversion of 417 mol/mol h TOF within very short time of 1 h at methanol/acid ratio of 25:1 under reaction temperature of 65 °C, which was attributed to the higher Brønsted acidity and cooperation of Lewis acidic site generating from Ti substituent. Limitation by its homogeneous performance, solidification of H7BW11Ti was designed via partial exchanging protons with choline cation (abbreviated as Ch+) to prepare a series of [(CH3)3NCH2CH2OH]nH7−nBW11TiO40 (abbreviated as ChnH7−nBW11Ti, n = 0 ~ 7). Among all solid catalysts, the highest efficiency had been achieved by with 99.0% conversion and 429 mol/mol h TOF within 50 min at 65 °C at methanol/acid ratio of 15:1. The comparable activity was attributed to the cooperation of Ch+—self-assembling to form nanoreactor with amphiphilic surrounding to concentrate substrates and to resist to water-poison, temperature-responsive property to control form changing between heterogeneous to homogenous. This temperature-responsive HPA catalyst was available for production of biodiesel through esterification reaction. In addition, Separation of such heteropolyacid catalysts was easy by the lowering the reaction temperature to room temperature without appreciable loss of its high performance, which were reused for more than six times.
      PubDate: 2017-08-24
      DOI: 10.1007/s10563-017-9232-3
  • The Solid-State-Grinding Synthesis of Maganese-Modified Cobalt Oxides and
           Application in the Low-Temperature CO Preferential Oxidation in H 2 -Rich
    • Authors: Changxiang Liu; Lei Gong; Meijuan Lu; Tingting Sun; Runying Dai; Qian Liu; Xigen Huang; Guangbin Liu; Zhong Huang
      Abstract: A series of MnOx modified cobalt oxides with different atomic molar ratios of Mn/(Mn + Co) were prepared by a soft reactive grinding route and investigated for CO preferential oxidation in H2. It was found that as-prepared Mn-doped cobalt oxides exhibited superior activity compared to the single constituted oxides, other Mn–Co–O mixed oxides synthesized by solution-based route, and other grinding-derived mixed metal oxides M–Co–O (M = Zn, Ni, Cu, Fe). The grinding-derived MnCo10 catalyst with Mn/(Mn + Co) molar ration of 10% showed the best CO oxidation activity and higher selectivity at low temperature. The surface richness of Co3+ was not found as increasing the Mn molar ratio in the present work. However, the incoporation of MnOx with proper amount into Co3O4 could produce high surface area, high structure defects, and rich surface active oxygen species, while the ability to supply the active oxygen species was suggested to play the crucial role in promoting the catalytic performance of Mn–Co–O mixed oxides.
      PubDate: 2017-08-03
      DOI: 10.1007/s10563-017-9235-0
  • Synthesis and Catalytic Property of Fibrous Titanium-Containing Graphite
    • Authors: Cheng Pan; Benhua Huang; Xiaoyong Li; Hua Zhu; Donghua Zhang; Aqun Zheng; Yu Li; Yang Sun
      Abstract: A new layered graphite oxide is synthesized by a two-step oxidation of commercial graphite powders, which is further covalently modified by a titanium complex in order for oxidation of alkenes. Characterizations reveal the present graphite oxide is thicker than classical graphene oxide, but shows fibrous morphology after modification of titanium complex. Furthermore, the composition and morphology of synthetic composite are highly relative to the heating condition in preparation. In catalysis, high conversions of alkenes as well as various oxidized products are obtained by using available and green terminal oxidants. Lastly, a composite catalyst is reused for nine rounds in oxidation of R-(+)-limonene, approving its satisfactory stability for recycling. This work provides a highly promising catalytic material, showing values for the design of solid catalysts.
      PubDate: 2017-07-29
      DOI: 10.1007/s10563-017-9233-2
  • Effect of Calcination Temperature on the Catalytic Oxidation of
           Formaldehyde Over Co 3 O 4 –CeO 2 Catalysts
    • Authors: Fenglin Huang; Canchang Chen; Fan Wang; Bing Wang; Lulu Zhang; Suhong Lu; Kelun Li
      Abstract: The effect of calcination temperature (350–650 °C) on the structure and catalytic activity of Co3O4–CeO2 mixed oxides prepared by sol–gel method was investigated by XRD, H2-TPR, O2-TPD and formaldehyde (HCHO) oxidation. The Co3O4–CeO2 calcined at 450 °C (Co3O4–CeO2-450) exhibited the best performance, showing that the complete oxidation of HCHO was achieved at temperature as low as 80 °C. The results of characterizations revealed that the Co3O4–CeO2-450 had excellent catalytic activity due to the larger specific surface area, the best reducibility and more abundant surface active oxygen species.
      PubDate: 2017-07-08
      DOI: 10.1007/s10563-017-9234-1
  • Recent Progress of Synthesis and Application in Au@MOFs Hybrid Materials
    • Authors: Yi Liu; Xinzhi Chen; Mingqiao Zhu; Umsa Jameel
      Abstract: The combination of gold nanoparticles and metal–organic frameworks is one of the new directions of current research. It has applications in many aspects, especially as a catalyst for a variety of reactions. Therefore, this paper describes recent progress of synthesis and application in Au@MOFs hybrid materials.
      PubDate: 2017-06-28
      DOI: 10.1007/s10563-017-9231-4
  • Hydrogen Production by Steam Reforming of Ethanol Over Mesoporous Ni–Al
           2 O 3 –ZrO 2 Catalysts
    • Authors: Ji Hwan Song; Seung Ju Han; In Kyu Song
      Abstract: This review paper reports the recent progress concerning the application of nickel–alumina–zirconia based catalysts to the ethanol steam reforming for hydrogen production. Several series of mesoporous nickel–alumina–zirconia based catalysts were prepared by an epoxide-initiated sol–gel method. The first series comprised Ni–Al2O3–ZrO2 xerogel catalysts with diverse Zr/Al molar ratios. Chemical species maintained a well-dispersed state, while catalyst acidity decreased with increasing Zr/Al molar ratio. An optimal amount of Zr (Zr/Al molar ratio of 0.2) was required to achieve the highest hydrogen yield. In the second series, Ni–Al2O3–ZrO2 xerogel catalysts with different Ni content were examined. Reducibility and nickel surface area of the catalysts could be modulated by changing nickel content. Ni–Al2O3–ZrO2 catalyst with 15 wt% of nickel content showed the highest nickel surface area and the best catalytic performance. In the catalysts where copper was introduced as an additive (Cu–Ni–Al2O3–ZrO2), it was found that nickel dispersion, nickel surface area, and ethanol adsorption capacity were enhanced at an appropriate amount of copper introduction, leading to a promising catalytic activity. Ni–Sr–Al2O3–ZrO2 catalysts prepared by changing drying method were tested as well. Textural properties of Ni–Sr–Al2O3–ZrO2 aerogel catalyst produced from supercritical drying were enhanced when compared to those of xerogel catalyst produced from conventional drying. Nickel dispersion and nickel surface area were higher on Ni–Sr–Al2O3–ZrO2 aerogel catalyst, which led to higher hydrogen yield and catalyst stability over Ni–Sr–Al2O3–ZrO2 aerogel catalyst.
      PubDate: 2017-05-31
      DOI: 10.1007/s10563-017-9230-5
  • Highly Efficient Mesoporous V 2 O 5 /WO 3 –TiO 2 Catalyst for Selective
           Catalytic Reduction of NO x : Effect of the Valence of V on the Catalytic
    • Authors: Luyao Zong; Fang Dong; Guodong Zhang; Weiliang Han; Zhicheng Tang; Jiyi Zhang
      Abstract: Mesoporous WO3–TiO2 support was synthesized by hydrothermal method, mesoporous V2O5/WO3–TiO2 catalyst was synthesized by impregnation method and used for selective catalytic reduction (SCR) of NOx with a excellent NOx conversion at a wider operating temperature ranging from 200 to 460 °C. In the range of 260–440 °C, NOx conversion reached to 98.6%, and nearly a complete conversion. Even with the existence of 300 ppm SO2, NOx conversion was only a little decline. The catalyst was characterized by a series of techniques, such as XRD, BET, XPS, TEM, Raman and H2-TPR. It was concluded that V2O5/WO3–TiO2 catalyst was ascribe to antase TiO2, and also the high crystallinity of anatase TiO2 could improve the SCR performance. More interested, V2O5/WO3–TiO2 catalyst exhibited the typical mesoporous structure according to the BET results. In addition, the TEM results indicated that the active components of V and W were well-dispersed on the surface of TiO2, while the enhancement of dispersion could improve the activity of catalysts. More importantly, the concentration ratio of V4+/(V5+ + V4+ + V3+) performed the key role in improving the activity of V2O5/WO3–TiO2 catalyst.
      PubDate: 2017-05-05
      DOI: 10.1007/s10563-017-9229-y
  • A Comparison of NO Reduction Over Mn–Cu/ZSM5 and Mn–Cu/MWCNTs
           Catalysts Assisted by Plasma at Ambient Temperature
    • Authors: Tao Wang; Xinyu Zhang; Hanzi Liu; Yonghong Guo; Yongsheng Zhang; Yang Wang; Baomin Sun
      Abstract: Manganese–copper bimetal oxide catalysts supported on ZSM5 and acid-treated multi-walled carbon nanotubes (MWCNTs) were produced by incipient wetness impregnation for selective catalytic reduction of NO with dielectric barrier discharge plasma. Plasma can activate molecules even at ambient temperature, generating active oxygen species such as O, O3, and HO2 radicals, which can oxidize NO to NO2 effectively. The SCR activity of Mn–Cu/MWCNTs was studied and compared to that of the Mn–Cu/ZSM5. The obtained samples were characterized by XRD, SEM, TEM, ICP, H2-TPR, Raman spectroscopy, and XPS. The results show that Mn–Cu/MWCNTs catalyst possesses NO removal activity superior to that of the Mn–Cu/ZSM5 catalyst. MWCNTs-based catalyst attains NO removal efficiency of 88% at 480 J/L, while the ZSM5-supported catalyst achieves NO removal efficiency of 82% at the same energy density. The oxygen content increased from 3.33 to 19.07% on the nanotube surface after introducing Mn and Cu, which almost remained unchanged on ZSM5. The oxygen-containing functionalities are important for NOx adsorption and removal. Moreover, the characterization revealed that CuO is the main phase of copper oxide, but copper dispersion decreases on Mn–Cu/ZSM5 surface because of the formation of copper dimer species. The manganese is well-dispersed on the catalysts, MnO2 and Mn2O3 contents of Mn–Cu/MWCNTs are larger than that of Mn–Cu/ZSM5, MnO2 is the predominant phase of manganese oxide.
      PubDate: 2017-04-27
      DOI: 10.1007/s10563-017-9228-z
  • Design and Exploration of –SO 3 H Group Functionalized Brønsted Acidic
           Ionic Liquids (BAILs) as Task-Specific Catalytic Systems for Organic
           Reactions: A Review of Literature
    • Authors: Parishmita Sarma; Arup Kumar Dutta; Ruli Borah
      Abstract: For several decades various chemical industries are involved in environment pollution by using hazardous chemicals or excessive use of solvents or catalysts to get maximum amount of desired product. In this case acidic ionic liquids may act as safer substitute of volatile organic solvents/or traditional Brønsted or Lewis acid catalysts with their unique dual task-specific solvent-catalyst properties. Recent surge in the literature review clearly describes the importance, properties and applications of acidic ionic liquids as solvent and efficient reusable catalyst in organic reactions. This review presents an account of some recent reports indicating the synthesis and uses of –SO3H functionalized ionic liquids(SFILs) as catalyst in organic synthesis.
      PubDate: 2017-04-27
      DOI: 10.1007/s10563-017-9227-0
  • Highly Ordered Mesoporous Cobalt-Copper Composite Oxides for Preferential
           CO Oxidation
    • Authors: Mingshi Jin; Zhenghua Li; Wenxiang Piao; Jing Chen; Long Yi Jin; Ji Man Kim
      Abstract: Highly ordered mesoporous cobalt-copper composite oxides were prepared by the nanocasting method with various Co and Cu ratios. The catalysts obtained were characterized by X-ray diffraction, N2 adsorption–desorption, H2-temperature programmed reduction, CO-temperature programmed desorption and X-ray photoelectron spectroscopy. All of the catalysts had uniform mesopores and high surface areas. The distinct catalytic properties of these well-characterized mesoporous materials were demonstrated for preferential CO oxidation. It is found that the mesoporous cobalt-copper composite oxides, exhibited the higher catalytic activity for CO conversion and selectivity compared with the mesoporous Co3O4 and mesoporous CuO. Among these catalysts the mesoporous cobalt-copper catalyst with Co:Cu molar ratio of 70:30, shows the best catalytic activity and the broadest operating temperature “window” for the high CO conversion in the range of 125–200oC. The higher catalytic activity was attributed to the higher CO adsorption and oxygen vacancies.
      PubDate: 2017-02-16
      DOI: 10.1007/s10563-017-9224-3
  • Sulfonic Acid-Functionalized Solid Acid Catalyst in Esterification and
           Transesterification Reactions
    • Authors: Shagufta; Irshad Ahmad; Rahul Dhar
      Abstract: The recent development of an environmentally benign solid acid catalyst has been a relatively cutting-edge area of research in the synthesis of value added esters and biodiesel. Solid acid catalysts are economically viable, effective, and environmentally amicable than conventional homogeneous catalysts and reusability of the catalyst is another advantage of these catalysts. The applicability of sulfonic acid-functionalized solid acid catalysts in the well-known esterification and transesterification reactions for the synthesis of esters and biodiesel, respectively along with their reusability aspect are discussed in this review.
      PubDate: 2017-02-14
      DOI: 10.1007/s10563-017-9226-1
  • CeO 2 –ZrO 2 –Al 2 O 3 Ternary Oxides Synthesized via Supercritical
           Anti-Solvent and as a Support for Pd Catalyst for CO Oxidation
    • Authors: Haoxi Jiang; Xiaohui Wu; Caixia Wang; Pan Huang; Yonghui Li; Minhua Zhang
      Abstract: CeO2–ZrO2–Al2O3 ternary oxides as a support for CO oxidation was synthesized successfully via supercritical anti-solvent (SAS) precipitation using CO2 as the anti-solvent and methanol as the solvent. It was found that the CeO2–ZrO2–Al2O3 fabricated by SAS precipitation (CZA1) had superior resistance to sintering compared to the traditional co-precipitation method (CZA2). Meanwhile, the oxygen storage/release rate of CAZ1 was almost 1.5 times higher than that of CZA2 and the total oxygen storage capacity (OSC) of CAZ1 was almost twice as high as CZA2. The interactions between the Pd and the CeO2–ZrO2–Al2O3 support were stronger for the support synthesized by SAS precipitation. The conversion of CO oxidation of Pd/CZA1 was even better than that of Pd/CZA2, especially at high GHSV.
      PubDate: 2017-02-04
      DOI: 10.1007/s10563-017-9225-2
  • The Influence of Alkali Treatment for Synthesizing Hierarchical Zeolite on
           Behavior of Cobalt Fischer–Tropsch Synthesis Catalysts
    • Authors: Yuelun Wang; Xuewen Cao; Yuan Jiang; Hong Zhang; Jing Liang; Hui Wang; Zhuo Li; Jinhu Wu
      Abstract: Hierarchical zeolites were synthesized by alkali treatment and their applications in Fischer–Tropsch (FT) synthesis were studied. It was found that alkali treatment not only created hierarchical structure but also could tune cobalt-support interaction. The dissolution of Si by alkali treatment became easier with the increase of Si/Al ratio, and thus the amount of mesopority increased. An optimal Si/Al molar ratio was identified over the zeolite with Si/Al ratio of 80, which was found to be superior to other catalysts in terms of better diesel selectivity and lower CH4 selectivity due to its relatively narrow bimodal pore size distribution and moderate cobalt-support interaction. Meanwhile alkali treatment could enhance cobalt-support interaction via the formation of ɑ-SiO2, Co/MZ-120 catalyst showed the lowest FT activity and higher CH4 selectivity due to the increase of such new phase.
      PubDate: 2017-01-19
      DOI: 10.1007/s10563-016-9223-9
  • Chiral Mesoporous Silicates Immobilizing Titanium Dioxide for Catalytic
           Asymmetric Epoxidation of Alkenes
    • Authors: Benhua Huang; Xiaozhi Jia; Yu Li; Aqun Zheng; Yang Sun
      Abstract: Two kinds of titanium-containing silicates were prepared by doping of titanium salt and chiral additive in a sol-gel process, which were further modified by chiral sulfonyl chloride in order for catalytic asymmetric epoxidation of alkenes. These titanium-containing materials had good porosities, ordered pore size distributions, high titanium incorporation yields, ordered morphologies, as well as internal chiral configurations. Particularly, they contained a lot of titanium dioxide particles according to TEM. In catalysis, the titanium silicates showed good conversion of alkenes, satisfactory yields and e.e. values of epoxides. The chiral inducing synergy appeared between silicate matrix and attached ligand, which was significant for transformations of styrene and α-methylstyrene. Moreover, iodosylbenzene, tert-butyl hydroperoxide and hydrogen peroxide were all promising oxidants. In addition, the present titanium catalysts showed satisfactory recycling behaviors and chemical stabilities. This work would contribute to the design of efficient chiral catalysts.
      PubDate: 2016-11-04
      DOI: 10.1007/s10563-016-9222-x
  • Direct Synthesis of Hydrogen Peroxide from Hydrogen and Oxygen Using
           Tailored Pd Nanocatalysts: A Review of Recent Findings
    • Authors: Myung-gi Seo; Ho Joong Kim; Sang Soo Han; Kwan-Young Lee
      Abstract: Direct synthesis of hydrogen peroxide from hydrogen and oxygen is being actively studied as an alternative to the current manufacturing process. The direct synthesis route has not reached the point of commercialization because of low yields, but significant effort is being spent on enhancing the productivity. With advances in computational capacity, simulation studies based on DFT calculations now offer directions for catalyst improvement, but such modifications can only be realized through the application of nanoparticle synthesis techniques that allow for nanocrystal morphology and size control and unique immobilization. To date, there have only been a small number of studies on such nanoparticles with size and crystallographic homogeneity for the direct hydrogen peroxide synthesis. According to our knowledge no other group has systematically investigated application of nanoparticles in direct synthesis of hydrogen peroxide, and thus included in this review are primarily previous studies conducted by our group. In this review, we discuss the utilization of nanotechnology for the synthesis of Pd catalysts and its effect on the direct synthesis of hydrogen peroxide, and we suggest a direction for future studies.
      PubDate: 2016-11-04
      DOI: 10.1007/s10563-016-9221-y
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