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化工进展  2015 

助剂对煤基合成气甲烷化反应用镍基催化剂的促进作用

DOI: 10.16085/j.issn.1000-6613.2015.02.014, PP. 389-396

Keywords: 甲烷化反应,合成气,镍基催化剂,助剂,甲烷,催化作用

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Abstract:

助剂促进的合成气甲烷化反应用镍基催化剂具有反应活性高、使用寿命长以及甲烷选择性高等优点,被广泛应用于煤基合成气甲烷化制替代天然气反应中。本文重点介绍了贵金属、碱土金属、稀土金属以及过渡金属助剂等对活性镍基催化剂的分散度、还原度、双金属合金协同效应、镍基催化剂结构稳定性及其对合成气甲烷化反应速率和产物选择性的影响。较系统地分析了这些助剂改性镍基催化剂的作用机制。提出了非贵金属助剂以及复合助剂将是合成气甲烷化用镍基催化剂助剂研发的发展方向,旨在为煤基合成气制替代天然气甲烷化催化剂的研发提供借鉴和参考。

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