【摘要】 从分析助剂的作用机理入手,研究了不同稀土助剂及其添加方式对低汽气比高变催化剂活性和选择性的影响,认为添加镧可能在催化剂表面起到富集水蒸汽的作用,从而抑制铜促进剂的甲醇合成活性,降低催化剂在低汽气比条件下的甲醇副产物生成量。更多还原

【Abstract】 By analyzing the mechanism of promoters,the influ- ence of the kinds of the rare earth promoters and the adding methods on the activity and selectivity of the high-temperature shift catalyst under low steam/gas ratio is investigated.It is thought that adding lanthanum may enrich the steam on the surface of the catalyst,so that the activity of the Cu promoter for synthesizing methanol is re- strained,which decreases the quantity of methanol by-product under the condition of low steam/gas ratio.更多还原