文献类型：期刊文献

中文题名：燃烧法制备Zr、Sm双助剂Ni/γ-Al_(2)O_(3)甲烷化催化剂

英文题名：Preparation of Zr and Sm dual promoted methanation catalysts by solution combustion method

作者：胡天益[1];马宏方[1];钱炜鑫[1];张海涛[1];应卫勇[1]

机构：[1]华东理工大学化工学院大型工业反应器工程教育部工程中心,化学工程联合国家重点实验室,上海200237

年份：2018

卷号：43

期号：6

起止页码：6

中文期刊名：天然气化工—C1化学与化工

外文期刊名：Natural Gas Chemical Industry

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2017_2018】；

基金：国家863计划(2012AA050102).

语种：中文

中文关键词：溶液燃烧法;甲烷化;Ni基催化剂;锆;钐;双助剂

外文关键词：solution combustion method;methanation;Ni-based catalyst;zirconia;samarium;dual promoters

摘要：采用溶液燃烧法制备了Zr、Sm单助剂以及Zr、Sm双助剂的Ni/γ-Al_(2)O_(3)催化剂,利用N_(2)吸附-脱附、XRD、TEM、H_(2)-TPR和CO-TPD对催化剂进行了表征。与单助剂催化剂相比,Zr、Sm双助剂催化剂能削弱Ni与载体间的相互作用,减少NiAl_(2)O_(4)尖晶石的生成。双助剂催化剂上Ni颗粒粒径更小,提供更多的活性位,促进了CO的吸附,提高了催化剂的催化活性。Ni-2Zr2Sm催化剂具有最好的低温活性,在280℃反应温度下,CO转化率为99.8%,CH_4选择性为98.8%,在50h高温稳定性测试中保持良好的高温稳定性,CO转化率稳定在92.5%左右。
Ni/γ-Al_(2)O_(3) methanation catalysts with Zr and Sm dual promoters were prepared by solution combustion method and characterized by N2 adsorption,XRD,TEM,H2-TPR and CO-TPD.Compared with single promoter catalysts,Zr and Sm dual promoted catalysts weaken the interaction between Ni and support,which restrained the formation of NiAl_(2)O_(4) spinel phase.There were more active sites in dual promoters catalysts for the smaller Ni particles,which could improve CO adsorption,facilitating CO methanation.Ni-2Zr2Sm exhibited excellent low-temperature catalytic activity with a CO conversion of 99.8%and a CH4 selectivity of 98.8%at 280℃,and also showed good stability during a 50 h stability test with a CO conversion of nearly 92.5%.