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.
出处
《化工学报》
EI
CAS
CSCD
北大核心
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
