不同条件制备的甲醇合成催化剂CuO/ZnO的活性与铜表面积的关系  

RELATIONSHIP BETWEEN CATALYTIC ACTIVITIES FOR METHANOL SYNTHESIS AND SURFACE AREA OF COPPER OF CuO/ZnO CATALYSTS PREPARED UNDER DIFFERENT CONDITIONS

作　　者：杜志强[1] 练宗源 韩明 姜玄珍[1] 

机构地区：[1]浙江大学化学系,杭州310027

出　　处：《Chinese Journal of Catalysis》1992年第3期230-233,共4页催化学报（英文）

基　　金：国家自然科学基金

摘　　要：共沉淀法制备的CuO/ZnO催化剂,用于二氧化碳加氢低压甲醇合成已有不少报导;但对催化剂制备中的一些重要环节探索不多,尽管Pan等研究过共沉淀时溶液的pH值不同,对所制的CuO/ZnO催化剂的铜表面积和合成甲醇(由一氧化碳加氢合成甲醇)活性的影响很显著.目前一般均采用1mol/L Na_2CO_3滴加到硝酸铜和硝酸锌混合溶液中,至pH值达8.2左右,但对滴加1mol/L Na_2CO_3的速度快慢对催化剂性能的影响尚未研究过;Four CuO/ZnO catalysts were prepared by co-precipitation method under different conditions. Their catalytic activities for methanol synthesis by CO2 hydrogenation under 1.01MPa were measured. The catalyst prepared by co-precipitating the solution of Cu(NO3)2 and Zn(NO3)2 with slow addition of 1 mol/L Na2CO3 solution demonstrated higher catalytic activity. The CO chemisorption and X-ray line broadening techniques were used to estimate the surface area of Cu exposed on the catalyst surface and the size of Cu crystallites. The results revealed that a catalyst with relative large Cu surface area and smaller crystallite size exhibited higher activity for methanol synthesis in the hydrogenation of CO2.

关 键 词：甲醇 加氢 CuO/ZnO 活性 二氧化碳 

分 类 号：O623.411[理学—有机化学]