完全液相法中Cu源对Cu-Zn-Al催化剂结构及性能的影响  

Effect of the source of Cu on the structure and performance of Cu-Zn-Al catalysts prepared by complete liquid-phase technology

作　　者：张小雨[1] 黄伟[1] 高志华[1] 张琳[1] 时培祥 边仲凯 

机构地区：[1]太原理工大学煤科学与技术教育部和山西省重点实验室,山西太原030024

出　　处：《燃料化学学报》2016年第10期1240-1248,共9页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21336006;21176176);国家科技支撑计划项目(2013BAC14B04);高等学校博士学科点专项(优先发展领域)(20111402130002)资助~~

摘　　要：采用完全液相法,分别以柠檬酸铜、硝酸铜、乙酸铜为Cu源制备了三种Cu-Zn-Al浆状催化剂,考察了不同铜源对催化剂催化合成气制二甲醚性能的影响,利用XRD、H2-TPR、NH3-TPD、BET、XPS和TEM等技术对催化剂进行了表征。结果表明,铜源对催化剂织构形貌及性能影响显著,用柠檬酸铜为铜源制备的催化剂铜物种分散性最好,铜物种与其他组分间相互作用强,可还原物质的量多,同时催化剂表面弱酸量与强酸量的比较高,催化剂的甲醇脱水能力提升,三种催化剂中柠檬酸铜催化剂性能最好,CO转化率为63.4%,二甲醚选择性为66.0%。Three kinds of Cu-Zn-Al slurry catalysts were prepared respectively with copper citrate, copper nitrate and copper acetate as the source of copper by complete liquid-phase technology. The effects of different sources of copper on the catalytic performance of dimethyl ether synthesis from syngas were investigated. The catalysts were characterized by XRD, H2-TPR, NH3-TPD, BET, XPS and TEM. The results indicated that the texture morphology and catalytic performance of the catalysts varied significantly. The catalyst prepared with copper citrate showed the best dispersion of Cu species in the catalyst and the largest amount of reducable substance. Meanwhile, the Cu species have strongest interaction with other components. Copper citrate increased the ratio of the amount of weak acid and strong acid on the surface of catalysts, and also improved the performance of the catalyst for methanol dehydration. So the catalytic performance of the catalyst pre-pared with copper citrate was the best. The conversion of CO was 63.4% and the DME selectivity was 66.0%.

关 键 词：完全液相法 Cu-Zn-Al催化剂 二甲醚 柠檬酸铜 乙酸铜 

分 类 号：O643[理学—物理化学]