用超声波技术制备的Raney Ni催化剂及其催化加氢活性  

Preparation of Raney Ni by Ultrasonic Wave and Its Catalytic Activity in Benzene Hydrogenation

作　　者：孟琦[1] 吴跃东[1] 万颖[1] 李和兴[1] 

机构地区：[1]上海师范大学化学系,上海200234

出　　处：《催化学报》2004年第7期529-532,共4页

基　　金：上海市科委基础研究重点项目 ( 0 2DJ14 0 5 )

摘　　要：将超声波技术与碱抽滤方法相结合制备出一种RaneyNi催化剂 .以苯饱和加氢为探针反应 ,测定了超声处理时间对RaneyNi催化剂催化活性 (包括吸氢速率和苯转化率 )的影响 .结果表明 ,超声处理对催化剂的活性有明显的促进作用 .随着超声处理时间的延长 ,催化剂的活性先逐渐升高 ,后慢慢降低 ,超声处理 1 5min时可获得最高的催化活性 .通过ICP ,XRD ,XPS ,BET和SEM等手段对RaneyNi催化剂的表面电子态、比表面积、孔体积、孔径、粒径及表面形貌等进行了表征 。Ultrasonic wave was applied during the alkaline leaching process of Ni Al mother alloy, resulting in a novel Raney Ni catalyst. By using the saturated hydrogenation of benzene to cyclohexane as a probe reaction, the effect of sonication time on the catalytic activity of Raney Ni was measured, including both the hydrogen absorption rate and the benzene conversion. The experimental results demonstrated that the sonication could greatly enhance the catalyst activity. With the increase in sonication time, the catalyst activity first increased and then decreased gradually. The optimum sonication time was 15 min. According to the results of ICP, XRD, XPS, BET and SEM, the promoting effect of ultrasonic wave was discussed briefly by considering the surface electronic state, surface area, particle shape and size, pore size and pore volume of the Raney Ni catalyst.

关 键 词：RANEY镍 苯 催化加氢 环己烷 超声波 

分 类 号：O643[理学—物理化学]