摘要
在介质阻挡放电等离子体反应器中研究了等离子体对Ni/ZSM-5催化剂催化CO_2甲烷化反应的促进作用,采用XRD和低温N_2吸附-脱附对Ni/ZSM-5催化剂进行了表征,考察了催化剂原位还原条件和反应条件对催化剂性质和反应性能的影响。实验结果表明,采用氢等离子体法可将催化剂前体转化为高分散、高活性的Ni/ZSM-5催化剂,等离子体还原时存在一个最佳输入功率。催化剂与等离子体具有显著的协同作用,在输入功率为33.3 W、原料气n(H)∶n(C)=5、气态空速为3 600 h^(-1)的条件下,CO_2转化率可达98%,甲烷选择性接近100%。
The promoting effects of the non-thermal plasma in Ni/ZSM-5-catalyzed methanation of CO2 were investigated in a dielectric barrier discharge reactor. Ni/ZSM-5 catalyst was prepared in situ from NiO/ZSM-5 by H2 plasma reduction and characterized by XRD and N2 adsorption-desorption. The reduction and reaction conditions were optimized. It is shown that highly dispersed Ni particles on ZSM-5 were obtained by the H2 plasma reduction method. A significant synergetic effect was observed for the non-thermal plasma and Ni/ZSM-5 in CO2 methanation. A conversion of 98% with selectivity to methane of around 100% was achieved at the following reaction conditions： input power 33.3 W, n（H） ： n（C） 5, GHSV 3 600 h1.
出处
《石油化工》
CAS
CSCD
北大核心
2017年第11期1355-1360,共6页
Petrochemical Technology
基金
国家自然科学基金项目(21173033
21473017)
关键词
镍催化剂
等离子体
二氧化碳
甲烷化
协同作用
nickel catalyst
plasma
carbon dioxide
methanation
synergetic effect
