介质阻挡放电等离子体处理载体对CO甲烷化Ni/SiO_2催化剂性能的改进  

Ni/SiO_2 catalyst for CO methanation with support treated by dielectric barrier discharge plasma

作　　者：赵化龙[1] 赵彬然[1] 闫晓亮[1] 刘媛 王勇 刘昌俊[1] 

机构地区：[1]天津大学化工学院先进纳米技术中心,天津300072 [2]北京低碳清洁能源研究所,北京102209

出　　处：《化工学报》2013年第1期283-288,共6页CIESC Journal

基　　金：北京低碳清洁能源研究所课题

摘　　要：以经介质阻挡放电等离子体处理的SiO2为载体,用浸渍法制备了Ni/SiO2催化剂,并进行了CO甲烷化反应评价。与载体未经处理的常规Ni/SiO2催化剂相比,载体经处理的催化剂在400℃下的CO与H2转化率均提高了约6%,且在经700℃烧结6h后,活性仍高于常规催化剂。XRD、TEM和H2-TPR结果表明,载体经处理的催化剂,Ni颗粒粒径更小、粒径分布更集中,Ni与SiO2之间的相互作用更强,证明等离子体处理使SiO2更有利于促进Ni的分散。Ni/SiO2 catalyst was prepared for CO methanation using SiO2 treated by dielectric barrier discharge plasma before impregnation.Compared with the conventional Ni/SiO2 catalyst without the treatment,the CO and H2 conversions at 400℃ were both approximately 6% higher for the support-treated catalyst.After the high temperature reaction at 700℃ for 6 h,the support-treated catalyst was still more active than conventional Ni/SiO2 catalyst.XRD,TEM and H2-TPR results showed that the support-treated catalyst had smaller Ni particle size and stronger interaction between Ni and SiO2,which confirmed that plasma treatment made SiO2 more favorable for Ni dispersion.

关 键 词：镍 甲烷化 等离子体 催化剂 

分 类 号：O643[理学—物理化学]