Effect of Calcination Temperature on the Microstructure and Surface Properties of a Cu/ZnO Catalyst Derived from Zn_(3)Cu_(2)(OH)_(6)(CO_(3))_(2)  

作　　者：Qiu Shiming Wang Shengjie 

机构地区：[1]School of Chemistry and Chemical Engineering,Guangxi Minzu Normal University,Chongzuo 532200,Guangxi,China [2]Guangxi Key Laboratory for High-value Utilization of Manganese Resources,Chongzuo 532200,Guangxi,China

出　　处：《China Petroleum Processing & Petrochemical Technology》2024年第2期46-56,共11页中国炼油与石油化工（英文版）

基　　金：the Chongzuo City Science and Technology Plan Project(Chongke20220608);the Guangxi Key Research and Development Plan Project(GuikeAB21220027).

摘　　要：The Cu/ZnO catalyst formed upon the calcination of aurichalcite has a uniform distribution of ZnO,which can delay the sintering of Cu species at high temperatures.In this study,aurichalcite possessing a nearly pure phase was prepared using the ammonium complex dissociation precipitation method,and the effect of calcination temperature on the structure and surface properties of the derived Cu/ZnO catalyst was studied.The results show that the calcination temperature determines the particle size and crystallization degree of the Cu/ZnO catalyst and the surface properties of the corresponding copper oxide and reduced copper.Low-temperature calcination is more conducive to reducing the particle size of the Cu/ZnO catalyst,increasing the specific surface area,and generating abundant defect characteristics on the surface,which is key to obtaining highly dispersed copper and copper-specific surface area catalysts by subsequent reduction.Additionally,the Cu/ZnO catalyst derived using a 300℃or 400℃calcination proved to have a higher specific activity per gram of copper than a commercial Cu/Zn/Al catalyst.The discovery in this study opens up a new method for the convenient preparation of a high-temperature resistant Cu/Zn methanol reforming catalyst.

关 键 词：methanol reforming COPPER zinc oxide lattice defect 

分 类 号：O643.36[理学—物理化学]