文献类型：期刊文献

英文题名：Ni based catalyst supported on KIT-6 silica for CO methanation: Confinement effect of three dimensional channel on NiO and Ni particles

作者：Lv, Yuhao[1];Xin, Zhong[1,2];Meng, Xin[1,2];Tao, Miao[1];Bian, Zhicheng[1]

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

年份：2018

卷号：262

起止页码：89

外文期刊名：MICROPOROUS AND MESOPOROUS MATERIALS

收录：;EI(收录号：20174704448973);WOS:【SCI-EXPANDED(收录号:WOS:000429395200009)】；

基金：This research was financially supported by National Natural Science Funds of China (Grant No. U1203293 and 91434128), the program of Shanghai Subject Chief Scientist (Grant No.10Xd1401500), the Fundamental Research Funds for the Central Universities (Grant No. 222201717025) and the Program of Shanghai Leading Talents (2013).

语种：英文

外文关键词：CO methanation; Ni based catalyst; KIT-6 silica; Three dimensional channel; Confinement effect

摘要：Several nickel catalysts supported on silica KIT-6 were synthesized via the incipient wetness impregnation method and the performance of the catalysts in CO methanation were investigated in a continuous flow fixed bed reactor. The mesoporous silica KIT-6 has three dimensional framework and large surface area, which can offer adequate sites for the metal to disperse. The amount of nickel loading has significantly affected the metal surface area and dispersion of nickel particles on the support. The catalysts with higher Ni loading exhibited better activity in CO methanation. It was also found that, compared with Al2O3, SiO2 and even meseporous SBA-15, KIT-6 silica has an obvious confinement effect to NiO particles as the size of NiO particles maintained consistent under different calcination temperature. However, at higher temperature, metallic nickel particles sintered due to the Ostwald ripening effect, which caused the pore blocking of the support and further led to the deactivation of the catalysts. (c) 2017 Elsevier Inc. All rights reserved.