Resistance of Ni/perovskite catalysts to H2S in toluene steam reforming for H2 production |
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| Affiliation: | 1. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;2. Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou 511458, China;3. CAS Key Laboratory of Renewable Energy, Guangzhou 510640, China;4. Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China;5. College of Materials Science and Energy Engineering, Foshan University, Foshan 528000, China;6. Chongqing Environment & Sanitation Group co. LTD, China;1. Department of Chemical Engineering, Nanomaterials, Catalysis & Electrochemistry, University of Liège, B6a, Quartier Agora, Allée du six Août 11, 4000, Liège, Belgium;2. Institute of Condensed Matter and Nanosciences (IMCN), Université catholique de Louvain, Place Louis Pasteur 1, 1348, Louvain-la-Neuve, Belgium;3. Department of Industrial Engineering, University of L''Aquila, 18 via G. Gronchi, 67100, L''Aquila, Italy;1. Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China;2. Division of Environmental Engineering Science, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan;1. Petrobras/CENPES, Av. Horácio Macedo, nº 950, Cidade Universitária, CEP 21941-915, Ilha do Fundão, Rio de Janeiro, RJ, Brazil;2. LabTecH – Laboratory of Hydrogen Technology, Escola de Química/UFRJ, Centro de Tecnologia, Bloco E, sala 206, CEP 21941-909, Rio de Janeiro, RJ, Brazil |
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| Abstract: | H2S is a kind of common impurity produced during the gasification of biomass, and it will poison the catalysts used in biomass tar steam reforming, leading to a rapid degradation on the catalytic performance. The purpose of this work is to investigate the characteristics of biomass tar steam reforming using Ni/perovskite catalysts with the presence of H2S. Results show that H2S could significantly reduce catalytic activity due to the adsorption of sulfur on Ni surface, and Ni/perovskite catalysts are less susceptible to this poisoning in comparison to the Ni-catalyst loaded on γ-Al2O3. To understand the mechanism, fresh and spent catalysts were characterized using various techniques of XRD, SEM-EDS, XPS and TPO. It is proved that the lattice oxygen in perovskite could transform into surface species, inhibit the adsorption of sulfur and thus benefit to the reactivity of catalysts during biomass tar steam reforming. |
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| Keywords: | Biomass to hydrogen Perovskite support Biomass tar |
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