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应用“原位”发射红外光谱技术对于Cu/ZnO/Al_2O_3(La)催化剂作用下的CO+H_2反应过程进行动态跟踪,检测到表面—烷氧基(M-OCH_2R)、表面酰基物()、表面烯醇()、表面羧酸盐()等中间物,提出CO插入表面—烷氧基生成低碳醇的反应机理;对于CO_2存在下CO+H_2反应过程的动态检测表明:CO_2增加了表面羧酸盐的生成途径,表面羧酸盐可以作为低碳醇合成的一种中间物,开辟了一条新的合成低碳醇途径。
The reaction of CO + H_2 under Cu / ZnO / Al_2O_3 (La) catalyst was dynamically tracked using “in situ” emission infrared spectroscopy. The surface-alkoxy groups (M-OCH_2R), surface acyl groups Surface enol (), surface carboxylate () and other intermediates. The reaction mechanism of CO insertion into the surface-alkoxy group to produce lower alcohols was proposed. The dynamic detection of CO + H 2 reaction in the presence of CO 2 showed that CO 2 increased the surface Carboxylate formation pathway, the surface of carboxylates can be used as an intermediate for the synthesis of lower alcohols, opened up a new pathway for the synthesis of lower alcohols.