低碳化学与化工2025，Vol.50Issue(5)：40-48,9.DOI:10.12434/j.issn.2097-2547.20240261
介孔铬/铈锆氧化物体系催化CO2氧化丙烷脱氢制丙烯反应性能研究
Study on catalytic performance of mesoporous chromium/cerium-zirconium oxide system for CO2-oxidative propane dehydrogenation to propylene
摘要
Abstract
Propane dehydrogenation(PDH)to propylene is an economical process.However,PDH faces challenges including low propane conversion and high Cr loading capacity in the catalyst,which contributes the environment pollution.To address these issues,a series of cerium-zirconium oxides with n(Ce)∶n(Zr)were synthesized by evaporation-induced self-assembly,and the corresponding catalysts were prepared by equal volume impregnation method and loaded with Cr,and CO2 oxidative dehydrogenation of propane(CO2-OPDH)was explored as an alternative route for propylene production.The catalysts were characterized by XRD,N2 adsorption/desorption,SEM,TEM and XPS.The results show that all catalysts form homogeneous cerium-zirconium solid solution with specific surface areas exceeding 70 m2/g and mesoporous structure.With the decrease of n(Ce)∶n(Zr),n(Cr3+)∶(n(Cr3+)+n(Cr6+)in the catalyst gradually increases,which enhances its catalytic performance.All catalysts have high initial propane conversion rate and propylene selectivity.With the increase of n(Ce)∶n(Zr),the initial conversion rate of propane decreases gradually.The catalyst with n(Ce)∶n(Zr)of 1∶9 exhibits initial propane conversion of 53％and propylene selectivity(when the reaction reaches stability)close to 90％at 600 ℃,0.1 MPa and propane space velocity of 200 h-1.The catalyst with n(Ce)∶n(Zr)of 5∶5 achieves a propane initial conversion rate comparable to that of industrial catalysts.Regeneration cycle test reveals that the catalyst with n(Ce)∶n(Zr)=1∶9 exhibits good stability,which provides valuable insights for the development of low-Cr loading capacity propane dehydrogenation catalysts..关键词
丙烷/CO2/丙烷氧化脱氢/丙烯/铈锆固溶体/Cr基催化剂Key words
propane/CO2/propane oxidative dehydrogenation/propylene/cerium-zirconium solid solution/Cr-based catalysts分类
化学工程引用本文复制引用
陈晓昂,张荣俊,徐润,李红伟,文富利,吴玉,侯朝鹏..介孔铬/铈锆氧化物体系催化CO2氧化丙烷脱氢制丙烯反应性能研究[J].低碳化学与化工,2025,50(5):40-48,9.基金项目
国家重点研发计划(2021YFA1501302). （2021YFA1501302）
