催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (10): 1003-1008.

• 研究论文 • 上一篇    下一篇

负载型纳米ZrO2-Al2O3复合载体中ZrO2的负载量对Ni基催化剂性能的影响

李凝   

  1. 桂林工学院材料与化学工程系, 广西桂林 541004
  • 收稿日期:2008-10-25 出版日期:2008-10-25 发布日期:2008-10-25

Effect of ZrO2 Content of the ZrO2-Al2O3 Composite Support on Catalytic Properties of the Ni-Based Catalyst

LI Ning*   

  1. Department of Material and Chemical Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China
  • Received:2008-10-25 Online:2008-10-25 Published:2008-10-25

PDF

823

摘要： 采用真空浸渍法在负载型纳米ZrO2-Al2O3复合载体上负载NiO, 并用X射线衍射考察了NiO在复合载体上的分散阈值. 结果表明,该分散阈值与ZrO2-Al2O3复合载体中ZrO2的负载量有关,当ZrO2的负载量为0.60 g/g时, NiO的分散阈值达到最高值0.315 g/g. 热重-微分热重和程序升温脱附结果表明, NiO在不同ZrO2负载量的复合载体表面形成不同的相互作用和分布状态,复合载体中ZrO2的负载量影响催化剂表面活性中心的种类和对CO2的吸附. 同时考察了不同ZrO2负载量的复合载体Ni基催化剂在CO2重整CH4反应中的活性和稳定性.

关键词: 二氧化锆, 氧化铝, 镍, 纳米, 复合载体, 分散状态, 二氧化碳, 甲烷

Abstract: The loading amount of ZrO2 in NiO/ZrO2-Al2O3 affected the reactivity an d stability of the catalyst. When the loading of ZrO2 was 0.60 g/g(Al2O3) , the dispersion of NiO reached the threshold value and the catalyst displayed a high catalytic activity and better stability.

Key words: zirconium dioxide, alumina, nickel, nanometer, composite support, dispersion state, carbon dioxide, methane