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

TiO2对Ni/Al2O3催化剂CO甲烷化性能的影响
引用本文:詹吉山,郭翠梨,张俊涛,张金利.TiO2对Ni/Al2O3催化剂CO甲烷化性能的影响[J].燃料化学学报,2012,40(5):589-593.
作者姓名:詹吉山  郭翠梨  张俊涛  张金利
作者单位:School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
基金项目:国家自然科学基金(20876113)
摘    要:采用溶胶凝胶法制备了一系列不同TiO2含量的TiO2-Al2O3复合载体,并通过浸渍法制备了NiO/TiO2-Al2O3催化剂。分别考察了不同TiO2含量的NiO/TiO2-Al2O3催化剂及反应温度对CO甲烷化催化性能的影响。实验结果表明,当复合载体中TiO2质量分数为30%,反应温度为350~450 ℃时,催化剂催化活性较高。利用N2吸附-脱附(BET)、X射线衍射(XRD)及H2程序升温还原(H2-TPR)等手段对催化剂物化性能进行了表征。结果表明,加入适量的TiO2能抑制镍铝尖晶石NiAl2O4物种的生成,改善NiO的表面分散性能,避免大晶粒NiO的形成,也改善了催化剂的还原性能,从而提高催化剂的CO甲烷化活性。

关 键 词:CO甲烷化  TiO2助剂  Ni/Al2O3  
收稿时间:2011-07-11

Effects of TiO2 promoter on the catalytic performance of Ni/Al2O3 in CO methanation
ZHAN Ji-shan,GUO Cui-li,ZHANG Jun-tao,ZHANG Jin-li.Effects of TiO2 promoter on the catalytic performance of Ni/Al2O3 in CO methanation[J].Journal of Fuel Chemistry and Technology,2012,40(5):589-593.
Authors:ZHAN Ji-shan  GUO Cui-li  ZHANG Jun-tao  ZHANG Jin-li
Institution:(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China)
Abstract:A series of TiO2-Al2O3 composite supports with different TiO2 contents were prepared by sol-gel method and then supported nickel catalysts(NiO/TiO2-Al2O3) were obtained by impregnation with NiO/TiO2-Al2O3 as the supports.The effects of TiO2 promoter content and reaction temperature on the performance of TiO2-Al2O3 catalysts in CO methanation were investigated.The results showed that the nickel catalyst supported on the TiO2-Al2O3 composite containing 30 % TiO2 exhibits the highest activity for CO methanation under a temperature from 350 to 450℃.BET,XRD and H2-TPR characterization results indicated that the addition of TiO2 promoter can restrain the formation of Ni/Al2O4,improve the dispersion of NiO,avoid the formation of large NiO granules,and make NiO reduction easier,which can then enhance the activity of the nickel catalysts in CO methanation.
Keywords:CO methanation  TiO2 promoter  Ni /Al2O3
本文献已被 CNKI 等数据库收录!
点击此处可从《燃料化学学报》浏览原始摘要信息
点击此处可从《燃料化学学报》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