摘要
耐硫甲烷化工艺对含硫气氛和低H2/CO比均有良好的适应性,是甲烷化技术发展的重要方向。其中Mo基催化剂是研究最为广泛的耐硫甲烷化催化剂。重点介绍了Al2O3、Zr O2、Ce O2和Ce O2-Al2O3载体以及Co O、Ni O助剂对Mo基催化剂耐硫甲烷化性能的影响;分析了催化剂的硫化机理以及Co O、Ni O助剂和Ce O2载体在硫化过程中的作用,指出硫化温度是影响催化剂的物种分布和催化性能的重要因素;阐述了耐硫甲烷化反应的机理;对甲烷化催化剂的研究方向进行展望。
Sulfur-resistant methanation have been investigated for their insensitivity to sulfur poisoning and high activities in the methanation reaction with low H2/CO ratios. Molybdenum-based catalysts were studied widely in literature. The effects of Al2O3, ZrO2, CeO2 and CeO2-Al2O3 supports, and CoO and NiO promoters on the performance of methanation catalysts were mainly introduced. The sulfidation mechanism for MoO3 and CoO/NiO promoted MoO3 catalysts and CeO2 support was critically analyzed based on the reported works. It was pointed out that the sulfidation temperature was a key factor to catalyst morphology. In addition, the mechanism of sulfur-resistant methanation was discussed. An overview regarding the opportunities for future research in sulfur-resistant methanation of CO was provided.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2015年第9期3357-3366,共10页
CIESC Journal
基金
国家高技术研究发展计划项目(2015AA050504)~~
关键词
甲烷化
催化剂
载体
氧化钼
硫化钼
加氢
methanatiom catalyst
support
molybdena
molybdenum sulfide
hydrogenation