CO选择性甲烷化的研究进展

CO选择性甲烷化被认为是适用于低温燃料电池的、最具发展潜力的CO深度去除技术，而该技术大规模应用的关键在于高性能负载型催化剂的开发。本文综述了近些年来CO选择性甲烷化的研究进展，以催化剂的选取和评判标准为起点，着重论述了CO和CO₂甲烷化的反应机理、粒径效应以及载体和助剂对催化剂活性和选择性的影响，最后总结了CO选择性甲烷化的研究并对未来的研究方向进行了展望。分析表明，选取合适的活性组分负载量以及载体和助剂可以大幅度提高催化剂的CO甲烷化活性，而通过氯离子改性以及Ru-Ni双金属的制备来控制金属-载体作用界面则是提高催化剂CO甲烷化选择性的关键。指出对甲烷化反应机理的研究和具有长期稳定性催化剂的开发是未来CO选择性甲烷化研究的重点。

Research progress of selective CO methanation

Selective CO methanation is considered as the most promising deep CO removal technology for the low-temperature fuel cells. Furthermore, the key to its wide applications is the development of high-performance supported catalysts. The research progress of selective CO methanation in recent years is reviewed in this article. Starting with the selection and evaluation criteria of catalysts, this article focuse on the reaction mechanism of CO and CO₂ methanation, the effects of particle size, supports and promoters on the catalytic activity and selectivity. Finally, the research on selective CO methanation is summarized and future research direction is also prospected. It is concluded that selecting appropriate loading of active components, supports and promoters can significantly improve the activity of the catalyst. However, the metal-support interface can be controlled by the chloride ion modification and the preparation of Ru-Ni bimetal, which plays a vital role in the improvement of the selectivity. The research on the methanation reaction mechanism and the development of long-term stable catalysts will be the focus of future researches.