石油化工2024，Vol.53Issue(7)：921-928,8.DOI:10.3969/j.issn.1000-8144.2024.07.001
前体元素含量及物相组成对甲醇合成催化剂性能的影响
Effect of elemental content and phase composition of precursors on performance of catalysts for methanol synthesis
摘要
Abstract
A series of Cu/ZnO/Al2O3 catalysts with varying n(Cu):n(Zn)were prepared via the co-precipitation method and characterized by XRD,FTIR,and N2 adsorption-desorption techniques.The catalysts were tested in the methanol synthesis reaction from syngas,and the evolution of the precursor phase structure with varying n(Cu):n(Zn)was studied.The effects of elemental content and phase composition of the precursors on the crystallite size,textural properties,and activity of the catalysts were analyzed.Results indicate that increasing the Zn content causes the precursor phase to transition from zincian malachite to a mixed phase of zincian malachite and aurichalcite,and finally to aurichalcite.The precursor phase composition reflects the relative Cu/Zn content in the catalyst and influences the crystallite size and textural properties after calcination,which in turn affects the catalyst performance.When the precursor is predominantly zincian malachite in a mixed phase with aurichalcite,the resulting catalyst has a smaller crystallite size,larger specific surface area and pore volume.Under these conditions,the catalyst exhibits optimal performance,achieving a methanol space-time yield of 1.45 g/(mL·h)and an activity decay rate of 11.7%,indicating promising potential for industrial application.关键词
Cu/Zn/Al2O3催化剂/甲醇合成/合成气/结构表征Key words
Cu/ZnO/Al2O3 catalysts/methanol synthesis/syngas/structural characterization分类
化学化工引用本文复制引用
江洋洋..前体元素含量及物相组成对甲醇合成催化剂性能的影响[J].石油化工,2024,53(7):921-928,8.基金项目
中国石油化工集团有限公司资助项目(222206). （222206）
