Template Free Synthesis of Ni-Perovskite: An Efficient Catalyst for Hydrogen Production by Steam Reforming of Bioglycerol
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- 作者：S. Ramesh ; N. J. Venkatesha
- 刊名：ACS Sustainable Chemistry & Engineering
- 出版年：2017
- 出版时间：February 6, 2017
- 年：2017
- 卷：5
- 期：2
- 页码：1339-1346
- 全文大小：518K
- ISSN：2168-0485
文摘
Ni-based perovskite catalysts are prepared by two different methods and used as selective catalyst for hydrogen production from glycerol. The physicochemical properties of the catalysts were studied by X-ray diffraction, H2 temperature-programmed reduction, NH3 temperature-programmed desorption, N2 physisorption and TEM analysis. The effects of perovskite structure on the Ni particle size and acidity were studied, and the possibility of a nontemplate approach is examined. Steam reforming of bio-glycerol was carried out in a fixed bed down flow reactor at atmospheric pressure. The catalysts were compared with the Ni supported alumina; catalysts prepared with and without template were found to contain smaller nickel oxide particles and optimum acidity for good glycerol conversion and hydrogen selectivity. Under optimized reaction conditions, LaNiO3 (E) catalyst exhibited 72% glycerol conversion with 70% hydrogen selectivity. The Ni/Al2O3 catalyst with bigger nickel oxide particle size and moderately strong acidic sites results in quick deactivation, metal sintering, and predominantly filamentous carbon deposition due to the coke formation.