超细Cu-ZnO-ZrO2催化剂上甲醇合成的TPSR和TPD研究

采用ＭＳ－ＴＰＳＲ和ＭＳ－ＴＰＤ技术在不同粒度的超细Ｃｕ－ＺｎＯ－ＺｒＯ２催化上考查了ＣＯ２和ＣＯ加氢合成甲醇的反应过程和吸附活化特征。研究表明，ＣＯ２和ＣＯ都可以直接加氢合成甲醇。

TPSR AND TPD STUDIES OF ULTRAFINE Cu-ZnO-ZrO2 CATALYSTS FOR METHANOL SYNTHESIS

Temperature programmed surface reaction (TPSR) and TPD of CO and CO 2 were conduced to study the mechanism of methanol formation from CO 2 as well as CO hydrogenation over ultrafine Cu-ZnO-ZrO 2 catalysts It is concluded that both CO 2 and CO can be hydrogenated directly to form methanol In the reaction of CO 2 H 2, the main source of carbon for methanol is CO 2, while in CO H 2, methanol can either be formed through CO directly, or by CO 2 which is formed through the water-gas shift reaction from CO Moreover, the particle size has great effect on the reactivity and the adsorption states of CO Methanol space time yield increases with decreasing of the particle size Expecially, when the particle size is very small, CO tends to convert to CO 2 firstly, and then forms methanol from CO 2 hydrogenation Otherwise, it produces methanol directly