还原条件对Cu-Zn-Al_2O_3催化剂催化环己醇脱氢性能的影响  

Influence of Reduction Conditions on the Catalytic Activity of Cu-Zn-Al_2O_3 for Dehydrogenation of Cyclohexanol

作　　者：安霞[1] 郭娟娟[1] 胡伟涛[1] 吴旭[1] 谢鲜梅[1] 

机构地区：[1]太原理工大学化学化工学院,太原030024

出　　处：《太原理工大学学报》2014年第4期458-462,共5页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(50872086);山西省自然科学基金资助项目(2013021008-4);太原理工大学校青年基金(2012L057)

摘　　要：采用固定床反应器,研究了Cu-Zn-Al2O3催化剂上环己醇常压气相脱氢制备环己酮的反应性能,详细考察了还原条件对催化剂结构及环己醇脱氢反应性能的影响,采用XRD、H2-TPR、CO2-TPD、NH3-TPD及BET等手段对催化剂进行了表征。结果表明,Cu-Zn-Al2O3催化剂在反应温度250℃,环乙醇进样量为0.5mL/min,还原温度为260℃,还原时间为2h的条件下具有较好的活性和选择性,环己醇转化率为67.59%,环己酮的选择性接近100%。The gas-phase dehydrogenation of cyclohexanol to cyclohexanone over Cu-ZnAl2O3coprecipitated catalysts under atmospheric pressure was carried out in a continuously fixed bed reactor.The effects of reduction conditions on catalytic performance were investigated in detail.The catalysts have been characterized by X-ray diffraction（XRD）,temperature programmed reduction（TPR）,temperature programmed desorption（TPD）,BET-surface area measurements（BET）.For Cu-Zn-Al2O3catalyst,the conversions of cyclohexanol is nearly 67.59%,the selectivity of cyclohexanone is almostly 100% under the conditions：reaction temperature of 250℃,the cyclohexanol liquid flow rate was 0.5mL/min,reduction temperature of 260℃,reduction time of 2h.

关 键 词：Cu-Zn-Al2O3催化剂 环己醇 脱氢 环己酮 

分 类 号：TQ426.8[化学工程]