可用于富氢重整气中CO消除的负载型Ni基甲烷化催化剂研究进展

富氢重整气中微量CO会引起燃料电池中Pt电极的永久性中毒而影响燃料电池的性能,通过CO甲烷化反应是消除富氢重整气中微量CO的有效方法。介绍了近年来在CO甲烷化Ni基催化剂组成、制备方法和催化机理等方面的研究进展。阐述了载体的性质、稀土和贵金属助剂以及制备方法对CO甲烷化Ni基催化剂性能的影响。研究重点通过优化载体、组成和制备方法制备新型Ni基催化剂,使其在低温下对CO甲烷化反应有着很好的催化活性、选择性和稳定性,同时抑制高温下CO2甲烷化反应和逆水煤气反应的发生。

Development in supported Ni-based methanation catalyst for removal of CO in hydrogen-rich reforming gases

Pt electrode of the fuel cells can be permanently poisoned by trace CO in the hydrogen-rich reformed gases.CO methanation is one of the effective methods of removal of the trace CO.The recent progress in the composition,preparation methods and catalytic mechanisms of Ni-based methanation catalysts were reviewed.The effects of support properties,the promoters of noble metal and rare earth metal,and their preparation methods on the performance of Ni-based methanation catalysts were also introduced.The research will be focused on the preparation of novel Ni-based catalysts by optimizing the carrier,the composition and the preparation methods in order to obtain CO methanation catalysts with good activity,selectivity and stability at low temperature and inhibit CO2 methanation reaction and the reversed water-gas shift reaction at high temperature.