制备条件对钯催化膜催化性能的影响  

Effect of Preparation Conditions on the Catalytic Performance of Palladium Catalytic Membrane

作　　者：李汉阳[1] 孙晓旭[1] 姜红[1] 陈日志[1] 

机构地区：[1]南京工业大学材料化学工程国家重点实验室,江苏省工业节水减排重点实验室,江苏南京210009

出　　处：《化学反应工程与工艺》2013年第4期321-326,共6页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金(21106061);国家科技支撑计划(2011BAEO7B05)

摘　　要：采用强制对流方法将纳米钯颗粒负载于单管对称氧化铝陶瓷膜上制备钯催化膜,并以对硝基苯酚液相还原制备对氨基苯酚为对象,研究了钯催化膜制备过程中的膜改性条件、钯盐溶液浸渍条件以及还原条件对其催化性能的影响。实验结果表明,适宜的制备钯催化膜的参数为:在6g/L的硅烷偶联剂KH 792/二氯甲烷溶液中改性1 h:在15 mmol/L乙酸钯/丙酮溶液中30℃下浸渍12 h;30℃下水合肼还原1 h,蠕动泵流量53 mL/min。在其条件下制备的钯催化膜在对硝基苯酚液相还原反应中显示了较好的催化性能,对硝基苯酚转化率达到98.5%。The palladium catalytic membrane was prepared by a flow-through method with the palladium nanoparticles immobilized on the ceramic membrane. The effects of preparation conditions, such as the modification of membrane, the impregnation of palladium solution and the reduction of hydrazine hydrate on the catalytic performance of palladium catalytic membrane were investigated in the liquid-phase reduction of p-nitrophenol. The experimental results showed that the palladium catalytic membrane exhibited the better catalytic activity in the reduction ofp-nitrophenol and the p-nitrophenol conversion could reach 98.5% under the optimal conditions as follows： the modification of 1 h under the concentration of silane coupling agent KH792 6 g/L, the impregnation of 12 h under the concentration of palladium acetate 15 mmol/L and the impregnation temperature 30 ℃, the reduction of 1 h under the reduction temperature 30℃and the flow of peristaltic pump 53 mL/min.

关 键 词：钯催化膜 陶瓷膜 对硝基苯酚 液相还原 

分 类 号：TQ031.4[化学工程]