中国石油大学学报（自然科学版）2024，Vol.48Issue(4)：224-232,9.DOI:10.3969/j.issn.1673-5005.2024.04.025
基于层状锌铝复合氢氧化物前驱体优化制备Cu/ZnO/Al2O3气相醛加氢催化剂
Preparation of Cu/ZnO/Al2 O3 catalyst based on ZnAl-layered double hydroxide precursor for gas-phase aldehyde hydrogenation
摘要
Abstract
Three different Cu/ZnO/Al2 O3 catalysts based on ZnAl-LDH precursors were prepared using sodium meta-alumi-nate as the aluminum source through one-step,two-step,and mixed methods.The structural properties of the catalysts and their precursors were characterized.Combined with the catalytic results for octenal(2-ethyl-2-hexenal,EPA)hydrogenation reaction,the effects of different preparation methods and aluminum introduction methods on the formation of ZnAl2 O4 spinel were investigated,and the structure-activity relationship between the structure of the obtained catalysts and their catalytic performance under different conditions was studied.Results show that the catalyst obtained by the mixed method exhibites comparable activity to industrial catalysts in the gas-phase hydrogenation of octenal.The product selectivity is 1.9%and 2.5%higher than that of industrial catalyst at a space velocity of 1.5 and 4.0 h-1,respectively.This is mainly because the ZnAl-LDH precursor prepared with sodium meta-aluminate as the aluminum source greatly improves the zinc aluminum bind-ing efficiency,reduces the production of unbound Al2 O3,improves product selectivity,and achieves the transformation of ZnAl-LDH to ZnAl2 O4 spinel under low calcination temperature(380℃),which avoides the sintering of CuO in traditional high-temperature calcination processes.关键词
Cu/ZnO/Al2O3催化剂/ZnAl2O4尖晶石/ZnAl-LDH/气相醛加氢Key words
Cu/ZnO/Al2 O3 catalyst/ZnAl2 O4 spinel/ZnAl-layered double hydroxide/hydrogenation of gaseous aldehyde分类
化学化工引用本文复制引用
白鹏,刘函澎,陈雪娇,张永辉,赵振祥,吴萍萍,黄德鑫,吴先锋,张志华..基于层状锌铝复合氢氧化物前驱体优化制备Cu/ZnO/Al2O3气相醛加氢催化剂[J].中国石油大学学报（自然科学版）,2024,48(4):224-232,9.基金项目
国家重点研发计划项目(2022YFA1503400) （2022YFA1503400）
