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应用ＦＴＩＲ和脉冲反应技术研究了ＣＯ_２和Ｏ_２在Ａｇ－Ｂａ－Ｃａ－Ｋ／α－Ａｌ２Ｏ３上的吸附及ＣＯ２对Ｃ２Ｈ４环氧化、完全氧化及环氧乙烷（ＥＯ）深度氧化反应的影响．研究结果表明，ＣＯ２和表面吸附氧在负载银催化剂表面存在竞争吸附，ＣＯ２对表面吸附氧有置换作用，该作用降低了银催化剂表面吸附氧的浓度，并且所形成的碳酸根物种改善了乙烯环氧化反应活住氧种的表面分布，对Ｃ_２Ｈ_４的环氧化反应有一定的抑制作用，但是对Ｃ２Ｈ４和ＥＯ的深度氧化反应的抑制作用更强，使得乙烯环氧化反应的选择性得到改善．
The adsorption of CO_2 and O_2 on Ag-Ba-Ca-K / α-Al 2 O 3 and the effect of CO_2 on the epoxidation and complete oxidation of C2H4 and the deep oxidation of ethylene oxide (EO) were investigated by FTIR and pulse reaction techniques. The results show that there is competing adsorption of CO 2 and surface adsorbed oxygen on the surface of supported silver catalyst, and CO 2 displaces surface adsorbed oxygen, which reduces the concentration of adsorbed oxygen on the surface of the silver catalyst and the formed carbonate species improves the ethylene ring The surface distribution of reactive oxygen species in the oxidation reaction has a certain inhibitory effect on the epoxidation reaction of C 2 H 4 but the inhibition on the deep oxidation reaction of C2H 4 and EO is stronger and the selectivity of ethylene epoxidation reaction is improved .