文献类型：期刊文献

英文题名：Highly active and coke resistant Ni/SiO2 catalysts for oxidative reforming of model biogas: Effect of low ceria loading

作者：Kathiraser, Y. Wang, Z. Ang, M. L. Mo, L. Li, Z. Oemar, U. Kawi, S.

第一作者：Kathiraser, Y.

通信作者：Kawi, S[1]

机构：[1]Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 117585, Singapore;[2]Zhejiang Univ, Inst Catalysis, Dept Chem, Hangzhou 310028, Zhejiang, Peoples R China;[3]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China

第一机构：Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 117585, Singapore

通信机构：corresponding author), Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 117585, Singapore.

年份：2017

卷号：19

起止页码：284-295

外文期刊名：JOURNAL OF CO2 UTILIZATION

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000404708000033)】；

基金：The authors gratefully thank the National University of Singapore (FRC, R-279-000-407-112), NRF (NRF-POC 001-055) and NEA (NEA-ETRP 1501103, RP No. 279-000-491-279) for generously supporting this work. The authors thank Dr. Borgna, Dr. Du, Dr. Xi and Dr. Saw for EXAFS analysis, Dr. Gao and Chia Renjie for technical support as well as Dr. Ashok for discussion.

语种：英文

外文关键词：Oxidative reforming of biogas; CO2 utilization; Syngas production; Ni catalyst; Low ceria loading; Strong metal support interaction

摘要：Biogas (consisting of greenhouse gases; CO2 and CH4) is a potential renewable resource for valuable syngas production. This is an industrially important method to utilize CO2 for high value chemical/energy production. Stability of economically viable Ni based catalysts is crucial to increase industrial viability of this environmentally sustainable process. Highly active and coke resistant ceria-promoted Ni/SiO2 catalysts were prepared using in-situ self-assembled core shell precursor route. Low ceria loading (0.5 wt %) was found beneficial in promoting the oxidative reforming of biogas activity as well as minimizing carbon deposition at the conditions tested. The positive influence exerted by such low loading of ceria was attributed to anchorage of ceria at interfacial sites of the Ni/SiO2 support, promoting intimate interaction of Ni-SiO2 within the mesopore wall via formation of nickel silicates with strong metal-support interaction. Such low loading of ceria, weakened the catalyst' Lewis acidity, and supplied oxygen vacancies which are crucial to maintain the reducibility of Ni, ensuring high activity and stability. (C) 2017 Elsevier Ltd. All rights reserved.