低碳化学与化工2025，Vol.50Issue(4)：38-45,8.DOI:10.12434/j.issn.2097-2547.20240357
Mg掺杂Cu/SiO2催化剂制备及其甲醇和乙醇合成异丁醛催化性能研究
Study on preparation of Mg-doping Cu/SiO2 catalyst and its catalytic synthesis performance of isobutyraldehyde from methanol and ethanol
摘要
Abstract
Isobutylaldehyde,as an important organic chemical raw material,can be synthesized in one-step from methanol and ethanol.Currently,the catalysts used for isobutyraldehyde synthesis are unable to achieve the highly efficient conversion of methanol and ethanol,and selectivity of isobutyraldehyde is relatively low.This has seriously hampered the development of the industrialization of the one-step synthesis of isobutyraldehyde from methanol and ethanol.Hence,there is an urgent need to develop highly efficient and stable catalysts for isobutyraldehyde synthesis.The Cu/SiO2 and xCuMg/SiO2 catalysts were prepared using the ammonia evaporation method.The physicochemical properties of these catalysts were characterized by N2 adsorption/desorption,H2-TPR,CO2-TPD,XRD,XPS and TEM.The impact of different Mg-doping amounts on the performance of the xCuMg/SiO2 catalysts in the one-step synthesis of isobutyraldehyde was investigated.The results show that the Mg-doping not only increases the basic sites on the catalyst surface and the active sites of Cu particles but also enhances the dispersion degree of the active component Cu particles.As a result,it increases the conversion rate of ethanol and the selectivity of isobutyraldehyde.Under the conditions of normal pressure,reduction temperature of 320 ℃,reaction temperature of 360 ℃,liquid hourly space velocity of 1.42 h-1 and V(methanol)∶V(ethanol)of 10∶1,the 1CuMg/SiO2 catalyst exhibits better performance,with the ethanol conversion rate can reach 97.26％and selectivity of isobutyraldehyde is 89.03％.Furthermore,no obvious deactivation is observed after continuous reaction for 200 h,indicating the catalyst has high stability.关键词
CuMg/SiO2催化剂/甲醇/乙醇/异丁醛/Mg掺杂Key words
CuMg/SiO2 catalyst/methanol/ethanol/isobutyraldehyde/Mg-doping分类
化学化工引用本文复制引用
王文玉,王馨艺,王康军,刘蝈蝈..Mg掺杂Cu/SiO2催化剂制备及其甲醇和乙醇合成异丁醛催化性能研究[J].低碳化学与化工,2025,50(4):38-45,8.基金项目
辽宁省自然科学基金(2021-NLTS-12-03) （2021-NLTS-12-03）
辽宁省教育厅项目(LJKZ0439) （LJKZ0439）
辽宁省教育厅青年项目(LJKQ2021068) （LJKQ2021068）
沈阳化工大学优青托举计划(2019YQ01). （2019YQ01）
