CuO-CeO2-ZrO2催化剂制备及其对CO选择性氧化性能的研究  

The CO Selective Oxidation over CuO-CeO_2-ZrO_2 Prepared by Sol-Gel Method

作　　者：林晓敏[1] 董新法[1] 林维明[1,2] 

机构地区：[1]华南理工大学化工与能源学院 [2]广州大学化学化工学院

出　　处：《石油与天然气化工》2008年第5期361-364,共4页Chemical engineering of oil & gas

基　　金：国家自然基金(20576023);广东省自然科学基金(06025660)资助项目

摘　　要：采用柠檬酸溶胶-凝胶法制备一系列CuO-CeO2-ZrO2复合氧化物催化剂,利用微反应-色谱装置对催化剂CO选择性氧化的催化性能进行了评价,并用XRD、TPR等对样品进行了表征。考察了不同柠檬酸/硝酸盐(c/n)配比对催化剂反应性能的影响。结果表明,当c/n为1.75时,催化剂表现出最佳的催化性能,在140℃～190℃温度区间,CO转化率在99%以上,且保持相对较高的选择性。实验结果还表明,催化剂的焙烧温度对催化活性也有很大的影响,550℃焙烧获得的催化剂表面非晶相CuO负载量最高,相应的催化剂活性也较高。The CuO-CeO2-ZrO2 compound oxide catalysts for the selective CO oxidation were prepared by the citric acid sol-gel method.The catalytic performance was evaluated by a micro reactor-GC system.The effects of different citric acid/nitrate(c/n)on the catalytic performance of the CuO-CeO2-ZrO2 catalysts were investigated.The results showed that when c/n=1.75,catalyst exhibited optimal performance in CO oxidation.High CO conversation(>99%)in a wide temperature range(140℃～190℃)and relative high selectivity were obtained.XRD and TPR measurements were also used to study the crystalline structure.The calcination temperature during preparing catalyst also had a significant impact on the catalytic performance.The loading of non-crystal CuO on the supports was the highest when catalyst was calcined at 550℃ and also revealed the best activity.

关 键 词：CO选择性氧化 溶胶-凝胶法 CuO—CeO2-ZrO2催化剂 

分 类 号：TM911.4[电气工程—电力电子与电力传动]