摘要
以乙酸盐为前驱体,采用水热法制备不同比例Cu/Zn催化剂,在未H_(2)预处理的情况下对其进行CO_(2)加氢制甲醇性能评价。采用XRD、TG-DSC、H_(2)-TPR、CO_(2)程序升温解吸和XPS等表征手段考察了不同Cu/Zn比对催化剂的晶相结构,表面性质和价态的影响,并对其活性位点进行研究。研究结果表明,以乙酸盐为前驱体制备的Cu/Zn催化剂,在未预处理的情况下进行CO_(2)加氢制甲醇活性评价,反应气(H_(2)∶CO_(2)=3∶1)中的H_(2)会将Cu/Zn催化剂的Cu^(2+)还原成Cu^(0),形成新的Cu^(0)-ZnO界面,使得其达到不错的性能,其中Cu/Zn45在3 MPa,240℃的条件下达到7.97 mmol/g·h的时空产率。
Using acetate as the precursor,different proportions of Cu/Zn catalysts were prepared by hydrothermal method,and the performance of CO_(2)hydrogenation to methanol was evaluated without H_(2)pretreatment.The effects of different Cu/Zn ratios on the crystalline phase structure,surface properties and valence state of the catalyst were investigated by XRD,TG-DSC,H_(2)-TPR,CO_(2)temperature-programmed desorption and XPS,and its active sites were studied.The results show that the activity of the Cu/Zn catalyst prepared with acetate as the precursor is evaluated without pretreatment,and the H_(2)in the reaction gas(H_(2)∶CO_(2)=3∶1)will reduce the Cu^(2+)of the Cu/Zn catalyst to Cu^(0)to form a new Cu^(0)-ZnO interface,which makes the Cu/Zn45 achieve a spatiotemporal yield of 7.97 mmol/(g·h)at 3 MPa and 240℃.
作者
周嘉斌
陈志远
王宇宁
龚杰松
纳薇
高文桂
ZHOU Jiabin;CHEN Zhiyuan;WANG Yuning;GONG Jiesong;NA Wei;GAO Wengui(School of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;State Key Laboratory of Clean Utilization of Complex Nonferrous Metal Resources,Kunming University of Science and Technology,Kunming 650093,China)
出处
《功能材料》
CAS
CSCD
北大核心
2024年第9期9178-9183,9190,共7页
Journal of Functional Materials
基金
云南省科技重大专项(202302AG050005-2)
昆明理工大学分析测试基金(2022M20212228018)。
关键词
二氧化碳
催化剂
加氢
前驱体
甲醇
carbon dioxide
catalyst
hydrogenation
precursor
methanol
