化工学报2018，Vol.69Issue(1)：396-404,9.DOI:10.11949/j.issn.0438-1157.20171143
低温耐硫甲烷化催化剂硫化过程
Sulfidation effect on low temperature sulfur-resistant methanation catalyst
摘要
Abstract
MoO3/ZrO2 catalyst, which prepared by solution combustion method, achieved the highest CO methanation activity due to its high surface area and effective MoO3 dispersion on ZrO2 support.By study of sulfidation process on methanantion activity, it was found that sulfidation pressure, time and H2S concentration had little effect but sulfidation temperature had significant effect.For one-step constant temperature sulfidation process, the optimum sulfidation temperature was 300℃.Catalyst characterization showed that isothermal sulfidation at 300℃ produced catalyst with complete sulfidation and many MoS2 crystalline, which is helpful to improve methanation activity.Isothermal sulfidation below 300℃ yielded catalyst with incomplete sulfidation and fewer amounts of MoS2 crystalline while isothermal sulfidation above 300℃ resulted aggregation of MoS2 crystalline, which will deteriorate MoO3/ZrO2 catalyst.For stepwise sulfidation process, the optimum sulfidation temperature was 400℃, which resulted catalyst with nearly same methanation activity as that of one-step isothermal sulfidation at 300℃.Therefore, the suitable sulfidation condition for MoO3/ZrO2 catalyst is determined as 0.1 MPa, isothermal 300℃, 3％ H2S/H2, and time 4 h.关键词
低温/硫化/催化剂/甲烷/一氧化碳/氧化钼Key words
low temperature/sulfur-resistant/catalyst/methane/CO/MoO3分类
化学化工引用本文复制引用
王玮涵,张晓珊,李振花,王保伟,马新宾..低温耐硫甲烷化催化剂硫化过程[J].化工学报,2018,69(1):396-404,9.基金项目
国家高技术研究发展计划项目(2015AA050504) （2015AA050504）
国家自然科学基金项目(21606167,21576203). supported by the National High Technology Research and Development Program (2015AA050504) and the National Natural Science Foundation of China (21606167,21576203). （21606167,21576203）
