焙烧温度对Cu-Zn-Al-Mg甲醇合成催化剂结构与性能的影响  

Effect of calcination temperature on structure and catalytic properties of Cu-Zn-Al-Mg methanol synthesis catalyst

作　　者：孙晨 贺安平 张可羡 周菊发 蔡洪城 郑天平 蒋莉萍 钟红 赵安民 Sun Chen;He Anping;Zhang Kexian;Zhou Jufa;Cai Hongcheng;Zheng Tianping;Jiang Liping;Zhong Hong;Zhao Anmin(National Engineering Research Center for C1 Chemistry,State Key Laboratory of Industrial Vent Gas Reuse,Southwest Institude of Chemical Co.,Ltd.,Chengdu 610225,Sichuan,China)

机构地区：[1]国家碳一化学工程技术研究中心,工业排放气综合利用国家重点实验室,西南化工研究设计院有限公司,四川成都610225

出　　处：《工业催化》2021年第2期48-54,共7页Industrial Catalysis

摘　　要：采用共沉淀法制备Cu-Zn-Al-Mg甲醇合成催化剂,并用XRD、N2低温吸附、H2-TPR、SEM、TG-DTG等手段对催化剂进行表征,着重考察焙烧温度对催化剂结构与性能的影响。结果表明,随着焙烧温度的增加,铜锌间的相互作用增强,有利于催化反应进行;但过高的焙烧温度又会导致催化剂中CuO晶粒过大,不利于铜的分散。350℃下焙烧4 h得到的催化剂活性最好;300℃下适当延长焙烧时间得到的催化剂无法达到相同性能水平。Cu-Zn-Al-Mg catalyst for methanol synthesis was prepared by coprecipitation method.Study was focused on the effects of calcination temperature on the structure and catalytic performance of the catalyst.XRD,N2-physisorption,H2-TPR,SEM,TG-DTG were used to characterize the physico-chemical properties of the catalysts,and catalysts activity were evaluated in a micro-reactor.Results indicated that suitable calcination temperature could promote the catalytic performance.Higher calcination temperature was beneficial to the catalytic reaction by enhancing the interaction between CuO and ZnO.However,catalysts with excessively high calcination temperature tended to form oversized CuO particles,which was not conducive to copper dispersion.The catalyst calcined at 350℃presented the best activity,while catalyst calcined at 300℃could not achieve similar activity with increase calcination time.

关 键 词：催化剂工程 共沉淀法 焙烧温度 Cu-Zn-Al-Mg 甲醇合成催化剂 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]