摘要
采用等体积浸渍法将活性组分钯负载在活性炭载体上，经化学还原制备负载Pd／C催化剂。将制备的Pd／C催化剂用于a．a-二甲基苄醇氢解制异丙苯反应，考察不同活性炭载体和热氢活化处理温度对催化剂性能的影响。结果表明，采用比表面积适中和孔容较大的活性炭作为催化剂载体，并在250℃进行热氢处理的催化剂具有良好的反应活性。比较适宜的工艺条件为：入口温度（140～160）℃，反应压力（2．0—3．0）MPa，氢油体积比200—300，空速4．0h-1。催化剂寿命试验中，a，a-二甲基苄醇转化率99．00％，异丙苯选择性大于99．50％，催化剂稳定性优良，具有良好的工业应用前景。
The activated carbon carriers loaded with the active component was obtained by incipient- wetness impregnation method, and then was treated by chemical reduction to prepare Pd/C catalyst. The as-prepared catalyst was used for hydrogenolysis of a, a-dimethyl-benzyl alcohol to cumene. The effects of different activated carbon carriers and activation conditions on the performaee of the catalyst were investigated. The results showed that the as-prepared catalyst prepared by using activated carbon carrier with the moderate specific surface area and larger pore volume and hot-hydrogenation treatment at 250 ℃ possessed good catalytic reactivity. The optimum process condition was as follows：reactor inlet temperature （140 - 160） ℃ ,reaction pressure （2.0 - 3.0） MPa,hydrogen/oil volume ratio 200 - 300 and LHSV 4.0 h-1. The results of the catalyst service life experiment indicated that a, a-dimethyl-benzyl alcohol conversion of 99.00% and the selectivity to cumene of over 99.50% were attained ; the catalyst exhibited good stability and industrial application prospects.
出处
《工业催化》
CAS
2016年第8期67-71,共5页
Industrial Catalysis
基金
国家重点研发计划(2016YFB0701105)资助项目
中国石化项目(414064)
