Recent advances in sulfur-resistant methanation

doi:10.11949/j.issn.0438-1157.20150876

Abstract

Abstract:

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.

Key words: methanation, catalyst, support, molybdena, molybdenum sulfide, hydrogenation

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、ZrO₂、CeO₂和CeO₂-Al₂O₃载体以及CoO、NiO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CoO、NiO助剂和CeO₂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。

关键词: 甲烷化, 催化剂, 载体, 氧化钼, 硫化钼, 加氢

CLC Number:

TQ221.1

WANG Weihan, LI Zhenhua, WANG Baowei, XU Yan, MA Xinbin. Recent advances in sulfur-resistant methanation[J]. CIESC Journal, 2015, 66(9): 3357-3366.

王玮涵, 李振花, 王保伟, 徐艳, 马新宾. 耐硫甲烷化反应的研究进展[J]. 化工学报, 2015, 66(9): 3357-3366.

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