摘要
采用ＴＰＤ、ＴＰＳＲ技术研究了铜基催化剂上ＣＯ２的吸附行为。结果表明ＣＯ２在铜基催化剂上有４个ＴＰＤ峰，它们代表催化剂表面上的Ｃｕ和受ＺｎＯ作用的Ｃｕ分别对ＣＯ２进行线形吸附和桥式吸附的结果。ＴＰＳＲ谱研究表明催化剂预吸附ＣＯ后，它能增加有利于甲醇合成的ＣＯ２吸附和抑制ＣＯ２加氢的逆水汽变换反应，从而增加合成甲醇的选择性和收率。
TPD and TPSR techniques were employed to study the adsorption of CO 2 on Cu based catalysts. There were 4 peaks appearing on the CO 2 TPD profiles, corresponding to CO 2 adsorbed on different active sites (Cu particles and Cu O Zn site) in linear and bridge bonded forms. TPSR result showed that the pre adsorption of CO on the catalysts enhanced the adsorption of CO 2, which would bring about CH 3OH synthesis and inhibit CO 2 hydrogenation to produce CO and H 2O (reverse water gas shift), resulting in an increase in CH 3OH yield.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
1998年第5期14-17,共4页
Natural Gas Chemical Industry
基金
香港浸会大学研究基金
厦门大学固体表面物理化学国家重点实验室资助项目
