燃料化学学报2016，Vol.44Issue(8)：985-992,8.
临CO2气氛下钼基催化剂耐硫甲烷化性能研究
Effect of CO2 in syngas on methanation performance of Mo-based catalyst
摘要
Abstract
The methanation of synthesis gas is the key process of coal to natural gas. Considering the existence of CO2 in the synthesis gas, it is important to investigate the influence of CO2 on the sulfur-resistant methanation. In this paper, the effect of CO2 on methanation activity of Mo-based catalysts was investigated at the reaction temperature of 550 ℃ and the gas space velocity of 5 000 h-1 with the syngas containing 1. 2% H2S(volume ratio) . The results show that the promoter Co and the cerium-aluminum composite support can improve the stability of the catalyst and reduce the deactivation. The CO2 is proved to promote the reverse water gas shift reaction, which would inhibit the activity of MoO3/Al2 O3 catalyst more heavily than MoO3-CoO/CeO2-Al2 O3 catalyst. When the CO2 adding to the inlet gas is less than 10% for 20 h, the catalyst activity could be restored to its original activity after stopping the addition of CO2 . However, as the added CO2 in inlet gas is over 10%, more H2 O will be generated through reverse water gas shift reaction to damage the catalyst structure and decrease the active component, resulting in an irreversible loss of catalyst activity.关键词
耐硫甲烷化/Mo基催化剂/二氧化碳/失活/水煤气变换Key words
sulfur-resistant methanation/Mo-based catalyst/carbon dioxide/deactivation/water-gas shift分类
化学引用本文复制引用
李振花,曲江磊,王玮涵,王保伟,马新宾..临CO2气氛下钼基催化剂耐硫甲烷化性能研究[J].燃料化学学报,2016,44(8):985-992,8.基金项目
The project was supported by the National Natural Science Foundation of China (21576203), the National High Technology Research and Dvelopment Program of China (863 program,2015AA050504) and the Research Program of Application Foundation and Advanced Technology of Tianjin (14JCZDJC37500).国家自然科学基金(21576203),国家高技术研究发展计划(863计划,2015AA050504),天津市应用基础与前沿技术研究计划重点项目(14JCZDJC37500)资助 （21576203）
