Effect of Mg modified CuZnAlY catalyst on the performance of CO2 hydrogenation to methanol
WANG Lei
CUI Haitao
LI Guoqiang
LI Feng
LI Biao
LIU Gang
LI Lei
Abstract：CO2 hydrogenation to methanol is an important way to achieve the goal of"double carbon".In this paper,CuZnAlY catalyst was modified by adding different contents of Mg,and its effect on the performance of CO2 hydrogenation to methanol was systematically studied.XRD,TPR,TPD and XPS were used to analyze the structure of the catalyst.The results showed that the addition of Mg built a suitable alkaline site,enhanced the CO2 adsorption capacity,improved the CO2 conversion and methanol selectivity.Among them,CZAYM2.5 composite catalyst has the highest space-time yield.Under the conditions of T=250℃,P=3.0 MPa,GHSV=4 000 mL/(mL·h),reaction gas H2∶CO2=3∶1(molar ratio),the CO2 conversion,methanol selectivity and methanol space-time yield reached 18.95%,51.49%and 0.154 9 g/(g·h),respectively.Meanwhile,stability tests were carried out for 720 h at improved pressure P=5.0 MPa.The results showed that:the CO2 conversion reached 22.00%,the selectivity of CH3OH was about 63.00%,and the methanol space-time yield was about 0.210 0 g/(g·h).The catalyst showed good stability.
Keywords：CO2 emissionsCO2 hydrogenationmethanolcomposite catalystMg modification
Publication Date：2025-03-31
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 72-82 )