文献类型：期刊文献

英文题名：Enhanced sintering resistance of bimetal/SBA-15 catalysts with promising activity under a low temperature for CO methanation

作者：Tao, Miao[1];Zhou, Changlu[1];Shi, Yaoqi[1,2];Meng, Xin[1,2];Gu, Jia[1];Gao, Wenli[1];Xin, Zhong[1,2]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Sch Chem Engn, Shanghai, Peoples R China

年份：2020

卷号：10

期号：35

起止页码：20852

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20202408818391);WOS:【SCI-EXPANDED(收录号:WOS:000540547000049)】；

基金：This research was financially supported by National Natural Science Funds of China (Grant No. 21808062 and 21776079), the Fundamental Research Funds for the Central Universities (22A1917025), China Postdoctoral Science Foundation (2017M611474), the program of Shanghai Subject Chief scientist (Grant No. 10Xd1401500).

语种：英文

外文关键词：Methanation - Temperature programmed desorption - Catalyst activity - High resolution transmission electron microscopy - Catalyst supports - Additives - Sintering - Temperature - X ray photoelectron spectroscopy

摘要：According to its thermodynamic equilibrium analysis and strong exothermic characteristics, the major challenge of syngas methanation is to develop a high-efficient low-temperature catalyst with superior sintering resistance. In this study, bimetal-based SBA-15 catalysts were prepared via a citric acid-assisted impregnation method and applied in CO methanation. The obtained catalysts were characterized via X-ray diffraction, N-2 adsorption-desorption, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, H-2 temperature-programmed reduction and other techniques. Combining the structural characterization of the fresh and used catalyst, the function of the organic additive and metal promoters was revealed. The catalysts exhibited superior low-temperature activity and excellent sintering resistance owing to the electron migration from the additive metal to Ni, strong interaction between the metal and support and the confinement effect of the support. The catalyst with Mo as a promotor exhibited the best dispersion and the largest surface concentration of nickel, which resulted in its highest catalytic activity among the catalysts. The design and preparation of a highly effective catalyst can provide novel insight into the preparation of other catalysts.