【摘要】 研究了CO和H2 在Cu ZnO基催化剂上的吸附性质。结果表明 ,H2 的化学吸附等温线与CO有所不同 ,在较高温度下可能存在H2 的溢流。CO为非解离吸附 ,H2 是解离吸附。CO的吸附热低于H2 的吸附热 ,催化剂对CO的活化比H2 困难。CO和H2 在失活的催化剂上化学吸附量显著减小。失活催化剂的总表面积、铜的表面积以及ZnO的表面积也减小。通过对CO和H2 在Cu ZnO基催化剂上的吸附性质的研究 ,不但可用来帮助探讨CO加氢反应机理 ,而且可为了解催化剂表面各组分的分布情况、预测催化剂的活性以及研究造成催化剂失活的原因提供证据。更多还原

【Abstract】 The adsorptive behavior of CO and H 2 on Cu ZnO based catalyst was studied The results showed that the adsorption isotherms of H 2 were different from CO At high temperature the overflow of H 2 on the surface of catalyst exists CO was adsorbed undissociatedly on the catalyst and H 2 was adsorbed dissociatedly The calculated adsorption heat of CO on Cu/ZnO/Al 2O 3 catalyst was less than that of H 2, therefore CO was more difficultly activated than H 2 on Cu/ZnO/Al 2O 3 catalyst The amounts of CO and H 2 chemisorption on the deactivated Cu/ZnO/Al 2O 3 catalyst was less than those on the fresh catalyst On the deactivated industrial catalyst for methanol synthesis, the total surface area, copper surface area and ZnO surface area were less than those on the fresh catalyst, respectively Studies of adsorptive characteristic of CO and H 2 on Cu ZnO based catalyst help to investigate the mechanism of hydrogenation of CO, and to confirm the dispersion statement, predict of catalytic activity and the factors that result in deactivation of catalyst [WT5”HZ]更多还原