钾改性CuZnAl催化醇脱氢生成甲乙酮反应动力学研究  

Kinetics of catalytic dehydrogenation of secondary butanol to methyl ethyl ketone over potassium modified CuZnAl

作　　者：李鹏[1] 安咏琪 周峰 赵瑛祁[1] 苑兴洲 马会霞 张健[1] LI Peng;AN Yong-qi;ZHOU Feng;ZHAO Ying-qi;YUAN Xing-zhou;MA Hui-xia;ZHANG Jian(Liaoning Petrochemical University,Fushun 113001,China;Sinopec Dalian Research Institute of Petroleum and Petrochemicals,Dalian 116041,China)

机构地区：[1]辽宁石油化工大学,辽宁抚顺113001 [2]中国石油化工股份有限公司大连石油化工研究院,辽宁大连116041

出　　处：《现代化工》2021年第9期129-134,共6页Modern Chemical Industry

基　　金：辽宁省自然科学基金(20170540475)。

摘　　要：以硝酸铜、硝酸锌、硝酸铝为原料,碳酸钠为沉淀剂,采用共沉淀法制备CuZnAl催化剂,并通过浸渍法引入钾元素制备钾改性CuZnAl催化剂。利用XRD、XPS对该催化剂进行表征。结果表明,钾元素可以成功引入到CuZnAl催化剂中,活性中心Cu以2种形态表现。将该催化剂用于仲丁醇(SBA)脱氢生成甲乙酮(MEK)的反应中,在常压、仲丁醇流速为0.1 m L/min、温度为220~250℃的条件下,仲丁醇的转化率为84%,甲乙酮的选择性为95%。运用matlab分析软件并采用双曲线及幂函数动力学模型对反应过程进行最小二乘法参数拟合,通过双曲线动力学模型得出表观活化能为45.51 kJ/mol;通过幂函数动力学模型得出该反应的反应级数为1.37,表观活化能为58.36 kJ/mol。Cu Zn Al catalyst is prepared by coprecipitation method with copper nitrate,zinc nitrate and aluminum nitrate as raw materials,and sodium carbonate as precipitant.The catalyst is characterized by means of XRD and XPS.It is shown that potassium can be successfully added into Cu Zn Al catalyst,and Cu is expressed in two forms in the active center.The catalyst is applied in the dehydrogenation of secondary butanol to methyl ethyl ketone.The conversion rate of secondary butanol reaches 84%,and the selectivity of methyl ethyl ketone reaches 95% when the flow rate of secondary butanol is 0. 1 m L·min-1 under atmospheric pressure at 220℃-250℃ .Matlab analysis software is employed to simulate the reaction process,hyperbolic curve and power function kinetic models are utilized to perform the least square method parameter fitting.It is obtained by hyperbolic kinetic model that the apparent activation energy is 45. 51 k J·mol-1. It is found out by power function kinetic model that the reaction order is 1. 37 and the apparent activation energy is58. 36 k J·mol-1.

关 键 词：钾 CUZNAL 仲丁醇 脱氢 甲乙酮 本征动力学 

分 类 号：TQ031.4[化学工程]