低碳化学与化工2025，Vol.50Issue(6)：16-24,9.DOI:10.12434/j.issn.2097-2547.20240469
Pd掺杂方式对Cu/ZnO低温催化CO2加氢制甲醇性能的影响
Effect of Pd doping method on low temperature catalytic performance of Cu/ZnO for CO2 hydrogenation to methanol
摘要
Abstract
CO2 hydrogenation to methanol is one of promising route for CO2 utilization.Cu/ZnO catalysts have garnered considerable attention due to their unique catalytic properties.A series of Pd doping Cu/ZnO catalysts were prepared by co-precipitation,impregnation,and mechanical mixing methods.The catalysts were characterized by ICP-OES,N2 physical adsorption/desorption,XRD and so on.The catalytic performances of each catalyst were tested under the conditions of temperature from 170℃to 250℃,pressure of 5.0 MPa and gas space velocity of 4000 mL/(g·h),and the effects of different Pd doping methods on the structures,morphologies and performances of Cu/ZnO catalysts were studied.The results show that Pd-Cu/ZnO-C catalyst prepared by co-precipitation method exhibits higher CO2 conversion rate,methanol selectivity and methanol space-time yield compared to the undoped Cu/ZnO catalyst.The co-precipitation method facilitates the uniform distribution and high dispersion of Pd in the catalyst.The synergistic catalysis between noble metal Pd and Cu effectively enhances hydrogen dissociation and spillover capabilities.Furthermore,the Pd-Cu/ZnO-C catalyst has small particle sizes,large specific surface areas and excellent reduction abilities,leading to a reduction of apparent activation energy.At low temperatures of 170℃and 190℃,CO2 conversion rates of Pd-Cu/ZnO-C catalysts are 5.5%and 8.9%,respectively,with methanol selectivities of 82.2%and 74.9%and methanol space-time yields of 0.058 g/(g·h)and 0.088 g/(g·h),respectively.关键词
CO2加氢/Pd掺杂/Cu/ZnO催化剂/低温甲醇合成Key words
CO2 hydrogenation/Pd doping/Cu/ZnO catalyst/low temperature methanol synthesis分类
化学工程引用本文复制引用
张培培,辛靖,李思漩,米晓彤,杨国明,刘影,陈新国,夏林..Pd掺杂方式对Cu/ZnO低温催化CO2加氢制甲醇性能的影响[J].低碳化学与化工,2025,50(6):16-24,9.基金项目
国家自然科学基金(U23B6003,U22B20136) （U23B6003,U22B20136）
中国海洋石油有限公司CCUS重大专项(KJGG-2022-12-CCUS-030401). （KJGG-2022-12-CCUS-030401）
