纳米铜锡复合氧化物制备及甲烷催化燃烧性能研究  

Preparation of CuO-SnO_2 Nano-Composites and Its Catalytic Properties for Methane Combustion

作　　者：崔梅生[1] 马丽景[2] 贾超[2] 赵娜[1] 黄小卫[1] 陈霭璠[2] 

机构地区：[1]北京有色金属研究总院有研稀土新材料股份有限公司,北京100088 [2]北京化工大学理学院,北京100029

出　　处：《稀有金属》2007年第4期520-525,共6页Chinese Journal of Rare Metals

基　　金：国家"十一五"863项目(2006AA06Z347);国家自然科学基金(20476012);北京市自然科学基金(2062017)资助项目

摘　　要：采用双股并流共沉淀法和柠檬酸络合法制备纳米铜锡复合金属氧化物催化剂。应用BET,TG-DTA,SEM,TEM和XRD对催化剂进行表征,并在常压微型固定床反应器中评价了催化剂的催化活性。研究了催化剂中铜含量和前驱物焙烧温度对催化活性的影响,并与柠檬酸络合法相比较。研究结果表明:得到了纳米级的复合物催化材料,粒径为10～20nm;铜含量为40%在600℃焙烧4h的催化剂具有较高比表面和最高甲烷燃烧催化活性;初步探讨了催化反应机制,并得到相关动力学参数和方程。The catalysts of CuO-SnO2 nano-composites were prepared by a parallel flow dripping precipitation method and characterized by BET,TG-DTA,SEM,TEM and XRD techniques.The catalytic activity of the catalysts for methane combustion was evaluated on a fixed-bed reactor under atmospheric pressure.The effects of preparation method compared with citrate complexation method,CuO contents（%,mole fraction）in catalyst and calcinations temperature on catalytic activity of the catalysts were investigated.The experimental results showed that the nano-composites with 10～20 nm the catalysts had high activity for methane combustion.The catalysts containing 40% CuO,calcined at 600 ℃ for 4 h showed a high specific surface area and the highest catalytic activity.The reaction mechanism,equation and related kinetic parameters were also discussed and obtained,respectively.

关 键 词：甲烷 催化燃烧 氧化铜 氧化锡 纳米复合催化剂 

分 类 号：O643.3[理学—物理化学]