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考察了四个复合催化剂在不同温度、不同空速条件下,由CO+H_2直接转化为烃类产物的选择性的变化,并与Cu-Zn-Al催化剂进行了比较。结果表明,复合催化剂的作用并非两种单独催化剂作用的简单加和。由于在分子筛上的反应,促使CO+H_2生成CH_3OH的平衡右移,从而大大提高了CO总转化率;升高反应温度,可促进CH_3OH的转化及C_s~+的生成,增加空速则有利于低碳烃的形成,初步探讨了CO+H_2合成烃类在复合催化剂上的反应过程。
The selective changes of the four composite catalysts from CO + H 2 to hydrocarbons at different temperatures and different space velocities were investigated and compared with Cu-Zn-Al catalysts. The results show that the effect of the composite catalyst is not a simple addition of the two separate catalysts. Due to the reaction on molecular sieve, the equilibrium shift of CH_3OH to CO + H_2 is promoted to the right, thus greatly increasing the total conversion rate of CO. Increasing the reaction temperature can promote the conversion of CH_3OH and the formation of C_s ~ + and increase the space velocity The formation of low-carbon hydrocarbons, preliminary discussion of CO + H_2 synthetic hydrocarbons in the composite catalyst reaction process.