文献类型：期刊文献

英文题名：Essential role of organic additives in preparation of efficient Ni/KIT-6 catalysts for CO methanation

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

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Sch 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：2018

卷号：558

起止页码：99

外文期刊名：APPLIED CATALYSIS A-GENERAL

收录：;EI(收录号：20181504996871);WOS:【SCI-EXPANDED(收录号:WOS:000433269700011)】；

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) and the Program of Shanghai Leading Talents (2013).

语种：英文

外文关键词：CO methanation; Organic additives; 5 wt%Ni/KIT-6; Thermostability; Ni dispersion

摘要：The introduction of organic additives rich in OH groups, such as citric acid, glucose and D-sorbitol, in nickel nitrate impregnation solutions is an efficient way to minify the size of NiO particles. The organic additives promote the wettability of the impregnation solution during solvent evaporation with increasing viscosity continuously, rather than act as ligands to Ni2+. This let Ni species are loaded into the micropores of support KIT-6, which can hinder the aggregation of Ni particles under severe conditions, e.g. thermal treatment at 650 degrees C. These organic additives can insulate the blocks of Ni species from each other during combustion without affecting their reducibility significantly, and result in a fairly high Ni dispersion. This kind of Ni-based catalysts possess excellent CO methanation catalytic performance: high CH4 selectivity (ca. 96% at 350 degrees C), great thermostability and long-term stability.