燃料化学学报2012，Vol.40Issue(4)：430-435,6.
沉淀剂对镍基甲烷化催化剂性能的影响
Influence of precipitant on the performance of nickel catalyst for methanation
摘要
Abstract
Ni-based catalysts for methanation were prepared by three different precipitants: urea, ammonium carbonate, ammonia and their activities were investigated under different conditions. The characterization of the catalysts were determined by XRD, H2-TPR, BET and TPO. Based on the results, the catalysts prepared by different methods of precipitation exhibited different catalytic properties: the surface area of the catalyst prepared by using urea reached up to 223.55 mVg, which suggested an stabilized catalytic activity; the catalyst prepared by ammonium carbonate precipitant had larger size particles, non-uniform distribution and more carbon deposition; the catalyst prepared by ammonia precipitant possessed smaller particle size,stronger interaction with support,but the loss of active components was more serious especially at high temperature. It was indicated that the precipitants mainly affected the shape and inner structure of the catalyst precursors,resulting in different fields of dispersion, crystal structure and hydrogen adsorption capacity. Thus, the activities and stabilities of the catalysts were different.关键词
沉淀剂/制备方法/镍基催化剂/甲烷化反应Key words
precipitant/ preparation method/ nickel catalyst/ methanation分类
化学化工引用本文复制引用
胡贤辉,王兴军,徐超,于广锁,王辅臣..沉淀剂对镍基甲烷化催化剂性能的影响[J].燃料化学学报,2012,40(4):430-435,6.基金项目
中央高校基本科研业务费专项资金资助. （）
