低碳化学与化工2025，Vol.50Issue(9)：1-9,9.DOI:10.12434/j.issn.2097-2547.20240492
制备方法对CuZnAl-ZrO2双功能催化剂合成气制C4烃类性能的影响
Influences of preparation methods on performances of CuZnAl-ZrO2 bifunctional catalysts for producing C4 hydrocarbons from syngas
摘要
Abstract
Heterogeneous synthesis is the reaction for direct synthesis of isobutene and isobutane from syngas(CO+H2).Currently,the reaction is performed using ZrO2-based catalysts,but the reaction conditions are generally harsh and the catalysts have low CO conversion rate and C4 hydrocarbon selectivity.In order to solve the problem of weak performance of CO activation to generate C1 species of single ZrO2,the bifunctional catalysts formed by coupling CuZnAl catalyst with ZrO2 were investigated.The bifunctional catalysts were prepared by co-precipitation,impregnation and physical mixing methods,respectively,and their texture properties,oxide mass fractions and crystalline phase structures were characterized.The performances of catalysts for production of C4 hydrocarbons were evaluated under syngas composition of n(CO):n(H2)=1:1,temperature of 260℃,pressure of 2 MPa and space velocity of 6000 mL/(g·h)for 72 h.The results show that the surface ZrO2 of CZA-ZrO2(im)obtained by impregnation method produced strong interaction with CuZnAl,and the surface of CZA-ZrO2(im)has suitable acidity and alkalinity,which were favorable for generating CH3O* species on CuZnAl,and generating C4 hydrocarbon isomers under the action of ZrO2.The CO conversion rate,C4 hydrocarbon selectivity and the proportion(mole fraction)of C4 hydrocarbon isomers in C4 hydrocarbons are 5.9%,15.1%and 79.7%,respectively.关键词
ZrO2/CuZnAl催化剂/双功能催化剂/C4烃类/合成气转化Key words
ZrO2/CuZnAl catalysts/bifunctional catalysts/C4 hydrocarbons/syngas conversion分类
化学化工引用本文复制引用
瞿凡,殷富,魏宇学,孙松,王飞,常强,张成华..制备方法对CuZnAl-ZrO2双功能催化剂合成气制C4烃类性能的影响[J].低碳化学与化工,2025,50(9):1-9,9.基金项目
国家重点研发计划(2022YFB4101204) （2022YFB4101204）
国家自然科学基金(22302219,22179001,22308001,21902001) （22302219,22179001,22308001,21902001）
安徽省高校杰出青年科研项目(2022AH020007) （2022AH020007）
安徽省高校协同创新项目(GXXT-2023-009) （GXXT-2023-009）
安徽省高等学校自然科学基金(2023AH050114). （2023AH050114）
