首先对二氧化碳甲烷化的二种机理进行了回顾，并对这二种机理存在的可能性进了探讨。结果表明，二氧化碳甲烷化经过一氧化碳加氢的可能性不大，而经过甲酸根中间体加氢的可能性极大。同时对在一氧化碳与二氧化碳共存时，一氧化碳对二氧化碳甲烷化的影响进行了动力学分析。 The two mechanisms of methanation of carbon dioxide were reviewed first, and the possibility of existence of these two mechanisms was discussed. The results show that carbon dioxide is not likely to be hydrogenated by carbon monoxide, and there is a high probability of hydrogenation by the formate intermediate. The kinetic analysis of the effect of carbon monoxide on methanation of carbon dioxide was also carried out in the presence of carbon monoxide and carbon dioxide.