首页 | 本学科首页   官方微博 | 高级检索  
     检索      

焙烧温度对 Pd/Al2O3 催化剂上甲烷燃烧反应性能的影响
引用本文:高典楠,王胜,刘莹,张纯希,王树东.焙烧温度对 Pd/Al2O3 催化剂上甲烷燃烧反应性能的影响[J].催化学报,2010,31(11):1363-1368.
作者姓名:高典楠  王胜  刘莹  张纯希  王树东
作者单位:1. 中国科学院大连化学物理研究所,辽宁大连,116023
2. 中国科学院大连化学物理研究所,辽宁大连116023;中国科学院研究生院,北京100049
基金项目:国家自然科学基金(20806079)
摘    要: 考察了载体与催化剂焙烧温度对 Pd/Al2O3 催化剂上低浓度甲烷催化燃烧反应性能的影响. 采用 X 射线衍射、透射电镜、N2 物理吸附、NH3 程序升温脱附和 O2 程序升温氧化等手段对载体和催化剂进行了表征. 结果表明, 焙烧温度对催化剂活性及稳定性的影响显著. 随着载体焙烧温度的升高, Al2O3 的比表面积、物相结构、酸中心的数量及强度明显改变, 相应的 Pd/Al2O3 催化剂中载体与 Pd 的相互作用减弱, Pd 分散度降低. 当载体焙烧温度为 1 100 °C, Pd/Al2O3 焙烧温度为 200 °C 时, 所得催化剂在 260 h 的连续反应中, 甲烷转化率始终维持在 99%以上.

关 键 词:  氧化铝  甲烷  催化燃烧  焙烧温度
收稿时间:2010-04-12

Methane Combustion over Pd/Al_2O_3 Catalyst:Effect of Calcination Temperature
GAO Diannan,WANG Sheng,LIU Ying,ZHANG Chunxi,WANG Shudong.Methane Combustion over Pd/Al_2O_3 Catalyst:Effect of Calcination Temperature[J].Chinese Journal of Catalysis,2010,31(11):1363-1368.
Authors:GAO Diannan  WANG Sheng  LIU Ying  ZHANG Chunxi  WANG Shudong
Institution:1Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China; 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:The effect of calcination temperature for the support and catalyst on the catalytic properties of the Pd/Al2O3 catalyst for lean methane combustion was investigated. The Pd/Al2O3 catalyst was prepared by the impregnation method using Al2O3 support calcined at 500–1 300 °C. All catalyst samples were characterized by X-ray diffraction, transmission electron microscopy, surface area measurements, temperature-programmed desorption of NH3, and temperature-programmed oxidation of O2. Calcination temperature significantly affected the catalyst activity and stability. As the calcination temperature increased, the structure of the support and the amount and intensity of the acid sites changed obviously, and the dispersion of the active component and the interaction between the support and active component decreased. The proper calcination temperature for the Al2O3 support was 1 100 °C, and the optimal calcination temperature for the Pd/Al2O3 was 200 °C. This catalyst showed high thermal stability and catalytic activity.
Keywords:palladium  alumina  methane  catalytic combustion  calcination temperature
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《催化学报》浏览原始摘要信息
点击此处可从《催化学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号