Effect of La2O3 and CeO2 loadings on formation of nickel-phyllosilicate precursor during preparation of Ni/SBA-15 for hydrogen-rich gas production from ethanol steam reforming |
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| Affiliation: | 1. School of Energy and Power Engineering, Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116023, Dalian, China;2. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;1. School of Materials Science and Engineering, University of Jinan, Jinan, 250022, China;2. School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China;3. Key Laboratory of Low Carbon Energy and Chemical Engineering, College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, PR China;1. Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, 59000 Lille, France;2. School of Chemical Science and Technology, Key Laboratory of Medicinal Chemistry for Natural Resource - Ministry of Education, Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, Yunnan University, 650091 Kunming, China;3. Institut Laue-Langevin (ILL), 38042 Grenoble Cedex, France;4. Institut de Recherches sur La Catalyse et I''Environnement de Lyon (IRCELyon), 69626 Villeurbanne Cedex, France;1. National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat Street, 400293 Cluj-Napoca, Romania;2. Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, 11 Arany Janos Street, 400028 Cluj-Napoca, Romania;1. Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming, 650093, PR China;2. School of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, PR China;3. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, PR China;1. Dip. Fisica e Geologia, Università degli Studi di Perugia, Via Pascoli, 06123, Perugia, Italy;2. Chemical Plants and Industrial Chemistry Group, Dip. Chimica, Università degli Studi di Milano, INSTM Unit Milano-Università and CNR-ISTM, via C. Golgi, 19, I-20133, Milano, Italy;3. Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF103AT, UK;4. Dip. di Ingegneria Civile, Chimica e Ambientale, Università degli Studi di Genova and INSTM Unit Genova, via all’opera Pia 15A, Genoa, Italy |
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| Abstract: | The importance of La2O3 or both La2O3 and CeO2 promoters on the formation of nickel phyllosilicate (Ni3Si4O12H2) as a precursor of Ni/SBA-15 for ethanol steam reforming (ESR) was investigated. The catalyst was made by a one-step modified conventional triblock copolymer synthesis method (pH-Adjustment with ammonium hydroxide). The prepared catalysts were characterized by N2 adsorption/desorption isotherms, XRD, H2-TPR, SEM-EDS and TGA-DSC techniques. The N2 adsorption/desorption isotherms identified the mesoporous nature of the catalysts and the XRD patterns of the calcined catalysts confirmed the formation of nickel-phyllosilicate structure. The H2-TPR analysis revealed that the La2O3 loading considerably increased the interaction between nickel and silica frame work of SBA-15 support. The ability of these catalysts for hydrogen production from ethanol steam reforming (ESR) was evaluated in a packed bed reactor at 650 °C. In the case of Ni/SBA-15 catalysts without and with La2O3 promoter, the ESR experiments experienced metal sintering and coke formation. Meanwhile, the catalytic activity of both La2O3 and CeO2 promoted Ni/SBA-15 catalyst (Ni-La2O3-CeO2/SBA-15) remained stable with time on stream in terms of GPR and hydrogen selectivity. The stable performance of this catalyst was explained by the strong interaction of nickel with SBA-15 promoted by La2O3 and the suppression of coke formation by CeO2. |
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| Keywords: | Mesoporous nickel-phyllosilicate Ni/SBA-15 catalyst Ethanol steam reforming Hydrogen production |
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