CO2加氢制甲醇Cu-Zn-Al水滑石催化剂的改性研究  

Study on the modification of Cu-Zn-Al hydrotalcite catalyst for the hydrogenation of carbon dioxide to methanol

作　　者：孙新凯 罗驹华 顾明敏 陈晓雯 江陈烨 Sun Xinkai;Luo Juhua;Gu Mingmin;Chen Xiaowen;Jiang Chengye(School of Materials Science and Engineering,Jiangsu University,Zhenjian 212013,Jiangsu,China;School of Materials Science and Engineering,Yancheng Institute of Technology,Yancheng 224051,Jiangsu,China;School of Materials Science and Engineering,Changzhou University,Changzhou 213100,Jiangsu,China)

机构地区：[1]江苏大学材料学院,江苏镇江212013 [2]盐城工学院材料科学与工程学院,江苏盐城224000 [3]常州大学材料科学与工程学院,江苏常州213100

出　　处：《工业催化》2020年第10期37-41,共5页Industrial Catalysis

基　　金：江苏省研究生实践创新项目(SJCX18_0886)。

摘　　要：CO2加氢制甲醇既能有效缓解温室效应带来的全球气温升高问题,也能促进CO2的资源化利用,成为研究热点之一。对Cu-Zn-Al水滑石(CZA-LDH)开展改性研究,以Cu(NO3)2·3H2O、Zn(NO3)2·6H2O和Al(NO3)3·9H2O为原料,以NaOH和NaCO3为沉淀剂,采用共沉淀法制备CZA-LDH,并在制备过程中引入聚乙二醇(PEG)、聚乙烯吡咯烷酮(PVP)和三乙醇胺(TEA),焙烧后得到4组催化剂。XRD、FT-IR、N2吸附-脱附、SEM表征结果及催化性能测试数据表明,引入TEA的CZA-LDH焙烧后得到的复合金属氧化物催化剂(CZA-LDO-TEA)表现出最优的性能。这是因为TEA能够破坏表面晶体结构,促进催化剂中CuO组分的还原,提高了CO2的化学吸附能力,从而提高了催化剂的CO2转化率。Since CO2 hydrogenation to methanol can not only effectively alleviate the severe problem of global temperature rise caused by the greenhouse effect,but also promote the resource utilization of CO2,it has become one of the current research hotspots.The modification of Cu-Zn-Al hydrotalcite(CZA-LDH)was studied in this paper.It was found that taking Cu(NO3)2·3H2O,Zn(NO3)2·6H2O and Al(NO3)3·9H2O as raw materials,NaOH and NaCO3 as precipitators,catalyst CZA-LDH was prepared by coprecipitation method.After XRD,FT-IR,N2 adsorption-desorption,SEM characterization analysis and catalytic performance testing,the data show that the composite metal oxide(Cu-Zn-Al-LDO)obtained by calcining the CZA-LDH with TEA shows the optimal performance.This is because TEA can destroy the crystal structure on the surface,promote the reduction of CuO components in the catalyst,improve the chemisorption capacity of CO2,and thus improve the CO2 conversion of the catalyst.

关 键 词：催化化学 Cu-Zn-Al水滑石 加氢催化剂 配体助剂 

分 类 号：O643.36[理学—物理化学] TQ426.94[理学—化学]