钾改性CuZnAl催化仲丁醇脱氢制甲乙酮  

Potassium modified CuZnAl catalyzed dehydrogenation of secondary butanol alcohol to methyl ethyl ketone

作　　者：李鹏 戴咏川[1] 苑兴洲 王彦娟[1] 张健[1] Li Peng;Dai Yongchuan;Yuan Xingzhou;Wang Yanjuan;Zhang Jian(School of Petroleum and Chemical Engineering,Liaoning Shihua University,Fushun Liaoning 113001,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《石油化工》2021年第1期6-12,共7页Petrochemical Technology

基　　金：辽宁省自然科学基金项目(20170540475)。

摘　　要：采用共沉淀法制备了CuZnAl催化剂,通过浸渍法引入钾元素,制备了钾改性的CuZnAl催化剂,利用H2-TPR,XRD,SEM,XPS及N2吸附-脱附对制备的催化剂进行表征,考察了催化剂催化仲丁醇(SBA)脱氢制甲乙酮(MEK)的性能。实验结果表明,钾的引入提高了CuZnAl催化剂表面Cu物种的分散度,且使还原后的活性组分Cu^0的含量增加;在常压、反应温度240℃、液态空速3.5 h-1的条件下,K改性(K2O含量2%(w))的CuZnAl催化剂活性最佳,与普通CuZnAl催化剂相比,SBA转化率从77.6%提高到83.5%、MEK选择性从89.0%提高到93.5%、MEK收率从69.1%提高到78.1%,且改性后催化剂具有优异的稳定性。The CuZnAl catalyst was prepared by co-precipitation method,and potassium modified CuZnAl catalyst was prepared by introducing potassium element by dipping method.The prepared catalysts were characterized by H2-TPR,XRD,SEM,N2 adsorption-desorption and XPS.The performance of catalytic dehydrogenation of secondary butanol alcohol(SBA)to methyl ethyl ketone(MEK)was investigated.The experiment result showed that potassium increased the dispersion of Cu species on the surface of CuZnAl catalyst and increased the content of Cu^0,the active component.In atmospheric,reaction temperature 240℃,LHSV of 3.5 h-1,K modification of CuZnAl catalyst activity best(2%(w)K2O),compared with the ordinary CuZnAl catalyst,SBA conversion increased from 77.6%to 83.5%,MEK selectivity increased from 89.0%to 93.5%,MEK yield increased from 69.1%to 78.1%,and the modified catalyst has excellent stability.

关 键 词：钾 CuZnAl催化剂 仲丁醇 脱氢 甲乙酮 

分 类 号：TQ032.4[化学工程]