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ENGINEERING (1204 journals)                  1 2 3 4 5 6 7 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 7)
3D Research     Hybrid Journal   (Followers: 17)
AAPG Bulletin     Hybrid Journal   (Followers: 7)
AASRI Procedia     Open Access   (Followers: 15)
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: 245)
Acta Geotechnica     Hybrid Journal   (Followers: 7)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 2)
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: 6)
Advanced Science     Open Access   (Followers: 5)
Advanced Science Focus     Free   (Followers: 3)
Advanced Science Letters     Full-text available via subscription   (Followers: 8)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 17)
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: 7)
Advances in Engineering Software     Hybrid Journal   (Followers: 25)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 16)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 10)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 22)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 26)
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: 11)
Advances in OptoElectronics     Open Access   (Followers: 5)
Advances in Physics Theories and Applications     Open Access   (Followers: 12)
Advances in Polymer Science     Hybrid Journal   (Followers: 41)
Advances in Porous Media     Full-text available via subscription   (Followers: 4)
Advances in Remote Sensing     Open Access   (Followers: 37)
Advances in Science and Research (ASR)     Open Access   (Followers: 6)
Aerobiologia     Hybrid Journal   (Followers: 1)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 4)
AIChE Journal     Hybrid Journal   (Followers: 31)
Ain Shams Engineering Journal     Open Access   (Followers: 5)
Akademik Platform Mühendislik ve Fen Bilimleri Dergisi     Open Access  
Alexandria Engineering Journal     Open Access   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 28)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 11)
American Journal of Engineering Education     Open Access   (Followers: 9)
American Journal of Environmental Engineering     Open Access   (Followers: 17)
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)
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: 16)
Applied Clay Science     Hybrid Journal   (Followers: 5)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 12)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4)
Applied Nanoscience     Open Access   (Followers: 8)
Applied Network Science     Open Access   (Followers: 1)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Physics Research     Open Access   (Followers: 3)
Applied Sciences     Open Access   (Followers: 2)
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: 4)
Archives of Foundry Engineering     Open Access  
Archives of Thermodynamics     Open Access   (Followers: 7)
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: 8)
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: 5)
Bautechnik     Hybrid Journal   (Followers: 1)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 23)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 4)
BER : Manufacturing Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Motor Trade Survey     Full-text available via subscription   (Followers: 1)
BER : Retail Sector Survey     Full-text available via subscription   (Followers: 2)
BER : Retail Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Survey of Business Conditions in Manufacturing : An Executive Summary     Full-text available via subscription   (Followers: 3)
BER : Survey of Business Conditions in Retail : An Executive Summary     Full-text available via subscription   (Followers: 3)
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Biofuels Engineering     Open Access  
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 10)
Biomedical Engineering     Hybrid Journal   (Followers: 16)
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: 17)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 32)
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: 14)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 9)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers, Droit, Sciences et Technologies     Open Access  
Calphad     Hybrid Journal  
Canadian Geotechnical Journal     Hybrid Journal   (Followers: 22)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 43)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 8)
Case Studies in Thermal Engineering     Open Access   (Followers: 4)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 8)
Catalysis Science and Technology     Free   (Followers: 7)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysis Today     Hybrid Journal   (Followers: 8)
CEAS Space Journal     Hybrid Journal  
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 3)
Central European Journal of Engineering     Hybrid Journal   (Followers: 1)
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: 1)
CienciaUAT     Open Access  
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: 14)
City, Culture and Society     Hybrid Journal   (Followers: 22)
Clay Minerals     Full-text available via subscription   (Followers: 10)
Clean Air Journal     Full-text available via subscription   (Followers: 2)
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: 1)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 13)
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: 26)
Composite Interfaces     Hybrid Journal   (Followers: 6)
Composite Structures     Hybrid Journal   (Followers: 266)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 185)
Composites Part B : Engineering     Hybrid Journal   (Followers: 278)
Composites Science and Technology     Hybrid Journal   (Followers: 180)
Comptes Rendus Mécanique     Full-text available via subscription   (Followers: 2)
Computation     Open Access  
Computational Geosciences     Hybrid Journal   (Followers: 14)
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: 7)
Computer Science and Engineering     Open Access   (Followers: 17)
Computers & Geosciences     Hybrid Journal   (Followers: 28)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 5)
Computers and Electronics in Agriculture     Hybrid Journal   (Followers: 4)
Computers and Geotechnics     Hybrid Journal   (Followers: 10)
Computing and Visualization in Science     Hybrid Journal   (Followers: 5)
Computing in Science & Engineering     Full-text available via subscription   (Followers: 30)
Conciencia Tecnologica     Open Access  
Concurrent Engineering     Hybrid Journal   (Followers: 3)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 7)
Control and Dynamic Systems     Full-text available via subscription   (Followers: 9)
Control Engineering Practice     Hybrid Journal   (Followers: 42)
Control Theory and Informatics     Open Access   (Followers: 8)
Corrosion Science     Hybrid Journal   (Followers: 25)
CT&F Ciencia, Tecnologia y Futuro     Open Access   (Followers: 1)
CTheory     Open Access  

        1 2 3 4 5 6 7 | Last

Journal Cover Catalysis Letters
  [SJR: 0.777]   [H-I: 94]   [2 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1572-879X - ISSN (Online) 1011-372X
   Published by Springer-Verlag Homepage  [2352 journals]
  • Investigation of Chloride Poisoning Resistance for Nitrogen-Doped Carbon
           Nanostructures as Oxygen Depolarized Cathode Catalysts in Acidic Media
    • Authors: Kuldeep Mamtani; Deeksha Jain; Anne C. Co; Umit S. Ozkan
      Pages: 2903 - 2909
      Abstract: HCl electrolysis used to manufacture Cl2, a compound of high industrial value, suffers from its high energy requirements. Significant energy savings can be attained by an alternative oxygen depolarized cathode (ODC)-based process where oxygen is reduced at the cathode instead of protons. Though the ODC process is extremely attractive, the state of the art catalysts for oxygen reduction reaction (ORR) suffer from chloride ion poisoning and/or involve toxic chemicals such as hydrogen sulfide (H2S). In the present work, we demonstrate that non-metal containing CNx catalysts do not get deactivated upon exposure to chloride ion environment unlike Pt/C or RhxSy/C where significant chloride ion poisoning was observed. The synthesis of these CNx materials is also extremely facile and scalable. In addition, the performance of the synthesized CNx catalysts was found to be very stable in HCl environment. Thus, the results presented here demonstrate the promise of CNx materials as alternative catalysts for ODC-based HCl electrolysis process to manufacture Cl2 in a sustainable and safer way. Graphical
      PubDate: 2017-12-01
      DOI: 10.1007/s10562-017-2205-3
      Issue No: Vol. 147, No. 12 (2017)
  • Mixed Oxides Without Added Noble Metals Derived from Layered Double
           Hydroxides of the Hydrotalcite Type in the Hydrodechlorination Reaction of
    • Authors: Judit Török; János Halász; Zoltán Kónya; Pál Sipos; István Pálinkó
      Pages: 2910 - 2919
      Abstract: NiMgAl-, CuNiAl- and CuMgAl-layered double hydroxides were prepared and after calcination, they were used to promote the hydrodechlorination of trichloroethylene. The calcined materials were active in the reaction and remained so in the repeated reaction after applying the rehydration-recalcination regeneration protocol. The freshly prepared, the calcined, the used, as well as the regenerated materials were studied by a range of methods (X-ray diffractometry, scanning electron microscopy, energy-dispersive X-ray analysis, BET surface area measurements). These results together with reaction data proved that the calcined layered double hydroxides, even without noble metal additives, acted as occasionally highly active and always highly hydrocarbon-selective catalysts in the hydrodechlorination reaction. Graphical
      PubDate: 2017-12-01
      DOI: 10.1007/s10562-017-2203-5
      Issue No: Vol. 147, No. 12 (2017)
  • Effect of Rhenium Loading Sequence on Selectivity of Ag–Cs Catalyst
           for Ethylene Epoxidation
    • Authors: Dongmei Ren; Gang Cheng; Jianwei Li; Jinbing Li; Wujun Dai; XinXin Sun; Daojian Cheng
      Pages: 2920 - 2928
      Abstract: Rhenium is an important promotor for silver catalyst, and very little work has been focused on the effect of rhenium loading sequence on the selectivity of ethylene oxide. Re was introduced to the Ag–Cs catalyst supported on α-Al2O3 in three different ways: co-impregnation (Ag–Cs–Re), step-impregnation with Re loaded first (Re/Ag–Cs), and step-impregnation with Re loaded last (Ag–Cs/Re). The selectivity of Re/Ag–Cs and Ag–Cs–Re are about 20% higher than that of Ag–Cs/Re, which indicates that the performance of the catalyst is influenced by the synergistic effect of Re and Cs. Rhenium oxides with the valence of + 4 to + 7 are distributed around the Ag particles. The binding energy of Re is increased by about 0.2 eV by the addition of Cs in the Ag–Cs–Re catalyst, and the presence of Re with high valence around Ag will cause the electrons to shift toward the Re atom, facilitating the formation of weakly adsorbed oxygen and improving the selectivity of the Ag–Cs catalyst. On the Ag–Cs/Re catalyst, Re is mostly loaded on the external Ag surface, and the binding energies of Ag 3d5/2 and Cs 3d5/2 increase by 0.2 and 0.4 eV, respectively, from the Ag–Cs/Re catalyst to the Ag–Cs–Re and Re/Ag–Cs catalysts. The higher binding energy of Ag leads to the stronger oxygen adsorption, which contributes to the complete oxidation reaction, thereby resulting in lower selectivity. Graphical
      PubDate: 2017-12-01
      DOI: 10.1007/s10562-017-2211-5
      Issue No: Vol. 147, No. 12 (2017)
  • Syngas Production from Ethanol Dry Reforming over Cu/Ce 0.8 Zr 0.2 O 2
    • Authors: Dong Cao; Weijie Cai; Yi Li; Congming Li; Hao Yu; Shaoyin Zhang; Fengzuo Qu
      Pages: 2929 - 2939
      Abstract: A Cu/Ce0.8Zr0.2O2 catalyst was synthesized by facile co-precipitation method and deeply studied for syngas production from carbon dioxide reforming of ethanol at various temperature and reactant ratios. The investigated catalyst showed promising activity and excellent stability along 90 h test, which was assigned to the strong synergistic metal-support interaction and high redox capacity as revealed by different characterization technique including X-ray diffraction (XRD), Raman, Oxygen storage capacity (OSC) and Temperature programmed reduction (H2-TPR) etc. Graphical
      PubDate: 2017-12-01
      DOI: 10.1007/s10562-017-2216-0
      Issue No: Vol. 147, No. 12 (2017)
  • Highly Active and Recyclable Mesoporous Molecular Sieves
           CaO(SrO,BaO)/SBA-15 with Base Sites as Heterogeneous Catalysts for
           Methanolysis of Polycarbonate
    • Authors: Yujun Zhao; Xiang Zhang; Xiuyan Song; Fusheng Liu
      Pages: 2940 - 2949
      Abstract: Mesoporous molecular sieves CaO(BaO, SrO)/SBA-15, which can produce basic sites, were synthesized by impregnation of a certain amount of CaO(BaO, SrO) on the synthesis of SBA-15 support, and used as heterogeneous catalysts for the methanolysis of polycarbonate (PC). The physicochemical properties, textual structures and catalytic performance were then studied in detail. The results showed that CaO/SBA-15 exhibited better catalytic activity than BaO/SBA-15 and SrO/SBA-15, and its catalytic activity was related to the loading amount of CaO. Moreover, the obtained product from the methanolysis of PC was mainly bisphenol A (BPA) with high purity. The influneces on reaction conditions of PC methanolysis catalyzed by 10%CaO/SBA-15 were also investigated. It was indicated that the PC conversion was nearly 100% and the BPA yield was over 96%. The stability of catalyst showed that 10%CaO/SBA-15 catalysts could be recycled and reused with negligible loss in activity over five cycles. In addition, a possible catalysis mechanism for the methanolysis of PC was proposed. Graphical
      PubDate: 2017-12-01
      DOI: 10.1007/s10562-017-2193-3
      Issue No: Vol. 147, No. 12 (2017)
  • Antimony(V) Chloride, SbCl 5 as a Labile Reagent in Organic
    • Authors: Maral Shekarchi; Farahnaz K. Behbahani
      Pages: 2950 - 2961
      Abstract: SbCl5 has been shown to be versatile reagent especially as a Lewis acid catalyst in many organic reactions such as electrophilic aromatic substitution, isomerization and rearrangements, halogenation, preparation of carbocation and onium ion complexes etc. Therefore in this paper applicably of antimony(V) chloride in organic transformations reactions is reviewed. Graphical
      PubDate: 2017-12-01
      DOI: 10.1007/s10562-017-2194-2
      Issue No: Vol. 147, No. 12 (2017)
  • Enhanced Cycle Performance of Silicon-Based Anode by Annealing Cu-Coated
           Carbon Cloth Current Collector for Flexible Lithium-Ion Battery
    • Authors: Baosheng Bai; Qiang Liu
      Pages: 2962 - 2966
      Abstract: Cu-coated carbon cloth (Cu/CC) fabrics with protuberance surface have been prepared in the work and evaluated as anode current collectors in Li-ion batteries. Firstly, the copper layers are formed on the carbon cloth surface by electrodepositing method. After annealing at 400 °C, hole and protuberance structure appears within the copper layers. Finally the electrodes are fabricated by annealed Cu/CC fabrics and silicon as current collectors and anode active materials for Li-ion batteries. The electrochemical properties of silicon cells with bare copper and copper layers coated current collectors are investigated. The initial discharge capacities are 1250 mAh/g at current density of 210 mA/g (0.05 C, C = 4200 mA/g). The batteries have good cycle performance and the capacities still remain 98% (compare with initial capacities) after 40 cycles. The good cycle performance of Cu/CC anodes are attributes to the particular morphology of copper layers. The expansion space of silicon materials can be buffered by protuberance structure during cycles. In addition, the Cu/CC electrode have good electrical conductivity and flexibility, which are expected to be used in flexible batteries and silicon based Li-ion batteries. Graphical
      PubDate: 2017-12-01
      DOI: 10.1007/s10562-017-2204-4
      Issue No: Vol. 147, No. 12 (2017)
  • A Hybrid Reduction–Impregnation Method in Preparation of Co–Ru/γ-Al 2
           O 3 Catalyst for Fischer–Tropsch Synthesis
    • Authors: Amir Irandoust; Ali Haghtalab
      Pages: 2967 - 2981
      Abstract: Three cobalt catalysts (Co) promoted by ruthenium supported on γ-Al2O3 were synthesized by incipient wetness co-impregnation (I/I), successive reduction (R/R), and a novel hybrid reduction–impregnation (R/I) methods. The Co loading in all of the present catalysts was 15.0 wt% and that of Ru was 0.15 wt%. To study the influence of the preparation methods on activity and selectivity of the Fischer–Tropsch synthesis, we used the prepared catalysts in a fixed-bed reactor. The different characteristic analysis tools such as X-ray diffraction, Transmission electron microscopy, Hydrogen temperature–programmed reduction, Brunauer–Emmett–Teller, Inductive Coupled Plasma and Energy–dispersive X-ray were carried out to determine the properties of the present prepared catalysts. The TPR peaks for Co⋅Ru/Al2O3(R/I) catalyst were presented significantly at lower temperatures than those obtained for the Co⋅Ru/Al2O3 (I/I) and Co⋅Ru/Al2O3 (R/R) catalysts. The average sizes of the cobalt oxide particle were calculated as 7.9, 17.2, and 37.3 nm for Co⋅Ru/Al2O3/R/R, Co⋅Ru/Al2O3 (R/I), and Co⋅Ru/Al2O3 (I/I), respectively, which are nearly consistent with those sizes obtained by TEM images. Using Co⋅Ru/Al2O3(R/I), the enhancement in CO conversion, C5+ selectivity, and chain–growth probability were 30, 18, 12.5%, respectively, in compared to those obtained by Co⋅Ru/Al2O3 (I/I) whereas the Co⋅Ru/Al2O3 (R/R) catalyst did not highly improve the FT performance with respect to Co⋅Ru/Al2O3 (I/I). Moreover, the highest CO conversion, C5+ selectivity, chain–growth probability factor and the lowest C1 selectivity belonged to the hybrid reduction–impregnation method. The effects of temperature (T = 210–230 °C) and pressure (P = 10–20 bar) were thoroughly investigated while H2/CO ratio and GHSV were kept 2 and 1800 per hour, respectively. Using the reaction yield of C5+ as a criterion, the Co⋅Ru/Al2O3(R/I) catalyst was selected to be the most productive catalyst at the optimum operating conditions 230 °C and 10 bars. Graphical
      PubDate: 2017-12-01
      DOI: 10.1007/s10562-017-2190-6
      Issue No: Vol. 147, No. 12 (2017)
  • Hβ Catalyzed Condensation Reaction Between Aromatic Ketones and Anilines:
           To Access Ketimines (Imines)
    • Authors: Vasu Amrutham; Naresh Mameda; Srujana Kodumuri; Durgaiah Chevella; Rammurthy Banothu; Krishna Sai Gajula; Nellya Gennadievna Grigor’eva; Narender Nama
      Pages: 2982 - 2986
      Abstract: A simple approach for the formation of imines by condensation of ketones and anilines over heterogeneous catalyst (Hβ zeolite) has been successfully developed. The present catalytic system scope was explored for various aromatic ketones and anilines. Furthermore, Hβ zeolite can be easily separable and recycled several times (five times) without considerable loss of its catalytic activity. Graphical
      PubDate: 2017-12-01
      DOI: 10.1007/s10562-017-2196-0
      Issue No: Vol. 147, No. 12 (2017)
  • Negative Effects of Dopants on Copper–Ceria Catalysts for CO
           Preferential Oxidation Under the Presence of CO 2 and H 2 O
    • Authors: Jiwoo Oh; Jeong Do Yoo; Keunsoo Kim; Hyung Joong Yun; WooChul Jung; Joongmyeon Bae
      Pages: 2987 - 3003
      Abstract: The effects of non-reducible dopants on copper–ceria catalysts for the preferential oxidation of carbon monoxide (CO PROX) were experimentally investigated by adding a non-reducible rare-earth element into the ceria support. Gadolinium-doped cerium oxides were synthesized by a combustion method as a support material for the copper–ceria catalytic system. Various compositions of the catalysts, i.e., CuO/Ce1−xGdxO2−δ (x = 0, 0.05, 0.1, 0.13, 0.18, 0.25 and 0.35), were prepared. The physical, structural, redox and surface chemical properties of the prepared catalysts were characterized by inductively coupled plasma mass spectrometry (ICP-MS), N2 isotherms, X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), H2 temperature-programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS) analyses. To investigate the influence of the dopants on the CO PROX, an activity test was conducted for each sample under a reactant stream containing CO, H2, CO2 and H2O. Negative effects of the dopants on the CO PROX activity were experimentally observed. Several characteristics on the catalysts induced by the insertion of dopants caused the effects. The presence of the non-reducible dopants on the surface hindered the efficiency of the redox equilibrium between copper and cerium, which is the essential process for CO PROX. Surface oxygen vacancies, generated by the introduction of foreign dopants, were not beneficial to the CO PROX activity. Copper species on the catalysts might be penetrated through these vacancies and protected as non-reactive reduced form in these vacancies. Graphical
      PubDate: 2017-12-01
      DOI: 10.1007/s10562-017-2188-0
      Issue No: Vol. 147, No. 12 (2017)
  • Soot Oxidation Activity of Redox and Non-Redox Metal Oxides Synthesised by
           EDTA–Citrate Method
    • Authors: Anjana P. Anantharaman; Hari Prasad Dasari; Jong-Ho Lee; Harshini Dasari; G. Uday Bhaskar Babu
      Pages: 3004 - 3016
      Abstract: In the present study, redox (CeO2, SnO2, Pr6O11 and Mn3O4) and non-redox (Gd2O3, La2O3 ZrO2 and HfO2) metal oxides were successfully synthesised using the EDTA–citrate complexing method and tested for soot oxidation activity. The characterization of the metal oxides is carried out using FTIR, XRD, BET surface area, pore volume analyser, SEM and TEM. The redox nature and metal–oxygen bond information of the metal oxides are obtained from XPS analysis. In redox metal oxides, three critical parameters [lattice oxygen binding energy, reduction temperature and Δr (ionic size difference of the corresponding metal oxide oxidation states)] govern the soot oxidation activity. Among the redox metal oxide samples, Mn3O4 and Pr6O11 samples showed lower binding energy for oxygen (Oβ—529.4, 528.9 eV respectively), lower reduction temperature (Tα—317 and 512 °C respectively) and have smaller Δr value (9 pm and 17 pm respectively). Thus, displayed a better soot oxidation activity (T50 = 484 and 482 °C respectively) than compared to other redox metal oxides. Among the non-redox metal oxides, HfO2 sample displayed higher BET surface area (21.06 m2/g), lattice strain (0.0157), smaller ionic radius (58.2 pm) and higher relative surface oxygen ratio (58%) and thus resulted in a significantly better soot oxidation activity (T50 = 483 °C) than compared to other non-redox metal oxides. Graphical
      PubDate: 2017-12-01
      DOI: 10.1007/s10562-017-2181-7
      Issue No: Vol. 147, No. 12 (2017)
  • Nano Copper(0)-Stabilized on Alumina: Efficient and Recyclable
           Heterogeneous Catalyst for Chemoselective Synthesis of 1,2-Disubstituted
           Benzimidazoles and Quinoxalines in Aqueous Medium
    • Authors: Jaya Pogula; Soumi Laha; Pravin R. Likhar
      Pages: 2724 - 2735
      Abstract: The present communication elicits the use of copper nanoparticles on aluminium oxide derived from Cu–Al hydrotalcite as a heterogeneous catalyst in the green and operationally simple approach for the synthesis of selective 1,2-disubstituted benzimidazoles and quinoxaline. Wide ranges of substituted o-phenylenediamines and aldehydes or α-bromo ketones were used to achieve the desired products using water as the reaction medium. The recoverability and reusability of the catalyst are the significant features in this eco-friendly green protocol. Graphical A simple and efficient process for the synthesis of benzimidazoles and quinoxaline in presence of Cu(0)/Al2O3 catalyst at room temperature is described.
      PubDate: 2017-11-01
      DOI: 10.1007/s10562-017-2166-6
      Issue No: Vol. 147, No. 11 (2017)
  • MMZ NiY -Catalyzed Tsuji–Trost Type of Reaction: A Selective Mono/Bis
           Allylation of Dicarbonyl Compounds
    • Authors: Samuthirarajan Senthilkumar; Cheirmakani Thangapriya; Raman Alagumurugayee; Mayilvasagam Kumarraja
      Pages: 2755 - 2763
      Abstract: An alternative method to Pd-catalyzed Tsuji–Trost reaction is developed and it provides a simpler route for the selective synthesis of a broad range of mono-/bis-allylated and cinnamylated 1,3-dicarbonyl compounds using MMZNiY catalyst at room temperature. Product selectivity can be controlled by the proper choice of catalyst. The catalyst was also well characterized by SEM, TEM, HRTEM, EDAX and X-ray analysis. Other advantages of catalyst like its ease of preparation, functional tolerance and its reusability are also highlighted. Graphical
      PubDate: 2017-11-01
      DOI: 10.1007/s10562-017-2185-3
      Issue No: Vol. 147, No. 11 (2017)
  • Understanding the Effect of NO Adsorption on Potassium-Promoted Co 3 O 4
           for N 2 O Decomposition
    • Authors: Min-Jae Kim; Seung-Jae Lee; In-Soo Ryu; Seung-Hyun Moon; Min-Wook Jeon; Chang Hyun Ko; Sang Goo Jeon
      Pages: 2886 - 2892
      Abstract: Co3O4 and K/Co3O4 were tested in catalytic N2O decomposition. K/Co3O4 exhibited higher activity than Co3O4, which was drastically and irrecoverably decreased with added NO. Studies revealed that the Co2+ valence state changed after NO adsorption, and that potassium strengthened the Co–NO bond, impeding NO desorption, even above 400 °C. Graphical
      PubDate: 2017-11-01
      DOI: 10.1007/s10562-017-2180-8
      Issue No: Vol. 147, No. 11 (2017)
  • Erratum to: Preparation of Hydrotalcite–Hydroxyapatite Material and Its
           Catalytic Activity for Transesterification of Soybean Oil
    • Authors: Henrique Brasil; Patrícia Pereira; José Corrêa; Luis Nascimento; Victor Rumjanek; Vitor Almeida; Natasha Coral; Elizabeth Rodrigues
      Pages: 2901 - 2901
      PubDate: 2017-11-01
      DOI: 10.1007/s10562-017-2177-3
      Issue No: Vol. 147, No. 11 (2017)
  • Polymer-Supported Cu–Nanoparticle as an Efficient and Recyclable
           Catalyst for Oxidative Homocoupling of Terminal Alkynes
    • Authors: Sk Tarik Aziz; Rafique Ul Islam
      Abstract: Copper nanoparticle on polyaniline support was synthesised by using in situ polymerisation and composite formation technique. This metal polymer nanocomposites material is found to be efficient for homocoupling of terminal alkynes which afford symmetrical 1,4-disubstituted 1,3-diynes in excellent yields under a mild reaction condition using piperidine as a base and dichloromethane at room temperature within 1–8 h. The reusability of the catalyst was also investigated and found to yield excellent yields upto six cycles without losing significant activity. Graphical
      PubDate: 2017-11-10
      DOI: 10.1007/s10562-017-2237-8
  • A Tandem Aerobic Photocatalytic Synthesis of Benzimidazoles by Cobalt
           Ascorbic Acid Complex Coated on TiO 2 Nanoparticles Under Visible Light
    • Authors: Fahimeh Feizpour; Maasoumeh Jafarpour; Abdolreza Rezaeifard
      Abstract: In this study, we developed methods for the one pot environmentally benign synthesis of benzimidazoles by cobalt ascorbic acid complex coated on TiO2 nanoparticles via aerobic photooxidative cyclization reactions. Easy work-up procedure, reusability of the catalyst and scalable to the multi-mole scale, which is valuable for an industrial process make these catalytic systems highly attractive. Also, the combination of photocatalytic and catalytic reactions presented here may help to develop a new strategy towards the development of photocatalysis-based organic synthesis. Graphical
      PubDate: 2017-11-10
      DOI: 10.1007/s10562-017-2232-0
  • Vapor Phase Catalytic Transfer Hydrogenation (CTH) of Levulinic Acid to
           γ-Valerolactone Over Copper Supported Catalysts Using Formic Acid as
           Hydrogen Source
    • Authors: Samadhan Lomate; Asima Sultana; Tadahiro Fujitani
      Abstract: Vapor phase catalytic transfer hydrogenation (CTH) of aqueous levulinic acid (LA) with formic acid as hydrogen source over different copper catalysts is reported. The Cu–SiO2 showed the highest LA conversion (56%) and selectivity to γ-valerolactone (GVL, 87%) at 250 °C. Analysis indicates that the presence of acid sites are responsible for the cleavage of C–O bonds forming angelicalactone intermediate followed by its hydrogenation to GVL over copper species. Even though the acid sites are necessary a quantitative correlation between acid sites and LA conversion was not observed. Characterization indicated that the higher conversion over Cu–SiO2 can be related to metal support interaction as evident from higher reduction temperature of copper species in H2-TPR compared to other catalysts. Graphical
      PubDate: 2017-11-10
      DOI: 10.1007/s10562-017-2241-z
  • Gold Promotion of MCM-41 Supported Ruthenium Catalysts for Selective
           Hydrogenation of α,β-Unsaturated Aldehydes and Ketones
    • Authors: Rongrong Li; Jia Zhao; Zhixing Gan; Wenping Jia; Chenglin Wu; Deman Han
      Abstract: In the challenging α,β-unsaturated aldehydes and ketones hydrogenation to unsaturated alcohols (UA), Ru–Au/MCM-41 exhibits superior high activity and selectivity compared with monometallic Ru. TEM and XRD measurements were applied to characterize as-prepared Ru/MCM-41 and Ru–Au/MCM-41 catalysts. The results indicated that the addition of Au significantly improved the dispersion of the metallic Ru components, thus enhancing the activity of the catalyst. The enhancement of selectivity to UA could be attributed to the interaction of Ru and Au components in the support and the morphology effect of Ru, which are revealed by in-suit DRIFTS, H2-TPD, XPS, and FTIR measurements. The morphological and electronic aspects of Ru particles lead to a favorable adsorption of C=O bond versus C=C bond. A dramatic increase in activity and selectivity of the reactions were observed upon the addition of Au, suggesting that the significant synergistic effects between Ru and Au play an important role in the activity and selectivity of the reaction. It is the first time that chemoselective hydrogenation of α,β-unsaturated aldehydes and ketones were studied on Ru–Au/MCM-41 catalysts. Graphical
      PubDate: 2017-11-09
      DOI: 10.1007/s10562-017-2218-y
  • Deactivation and Characterization of SCR Catalysts Used in Municipal Waste
           Incineration Applications
    • Authors: Jan G. M. Brandin; C. U. Ingemar Odenbrand
      Abstract: Catalysts used for selective catalytic reduction were deactivated for various times in a slipstream from a municipal solid waste incineration plant and then characterized. The activity for NO reduction with NH3 was measured. The Brunauer–Emmett–Teller surface areas were determined by N2 adsorption from which the pore size distributions in the mesopore region were obtained. Micropore areas and volumes were also obtained. The composition of fresh and deactivated catalysts as well as fly ash was determined by atomic absorption spectroscopy and scanning electron microscopy with energy dispersive X-ray analysis. The changes in surface area (8% decrease in BET surface area over 2311 h) and pore structure were small, while the change in activity was considerable. The apparent pre-exponential factor was 1.63 × 105 (1/min) in the most deactivated catalyst, compared to 2.65 × 106 (1/min) in the fresh catalyst, i.e. a reduction of 94%. The apparent activation energy for the fresh catalyst was 40 kJ/mol, decreasing to 27 kJ/mol with increasing deactivation. Characterization showed that catalytic poisoning is mainly due to decreased acidity of the catalyst caused due to increasing amounts of Na and K. Graphical
      PubDate: 2017-11-06
      DOI: 10.1007/s10562-017-2229-8
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