催化学报

催化学报 ›› 2006, Vol. 27 ›› Issue (11): 940-942.

• 研究快讯 • 上一篇    下一篇

新型多孔莫来石纤维陶瓷负载La0.8Sr0.2CoO3-δ钙钛矿催化剂

段碧林1,曾令可1,刘平安1,税安泽1,王小华2   

  1. 1 华南理工大学材料科学与工程学院, 广东广州 510640; 2 吉首大学化学与化工学院,湖南吉首 416000
  • 收稿日期:2006-11-25 出版日期:2006-11-25 发布日期:2006-11-25

A Novel Porous Mullite Fiber Ceramics as a Support for La0.8Sr0.2CoO3-δ Perovskite Catalysts

DUAN Bilin1, ZENG Lingke1, LIU Ping'an1, SHUI Anze1, WANG Xiaohua2   

  1. 1 Department of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China; 2 Department of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, Hunan, China
  • Received:2006-11-25 Online:2006-11-25 Published:2006-11-25

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摘要： 利用空气挤压排液成型法在 1250 ℃下制得了高孔隙率高热稳定性的莫来石纤维陶瓷. 这种多孔莫来石纤维陶瓷具有较均匀的孔分布,并且孔隙率高达96.22%. 以这种多孔陶瓷为载体制备了负载型La0.8Sr0.2CoO3-δ钙钛矿催化剂,该催化剂对NO氧化CO表现出很好的催化活性和稳定性. 在催化剂中掺入贵金属Pd之后,催化剂的催化活性得到了很大的提高.

关键词: 多孔莫来石纤维陶瓷, 钯, 负载型催化剂, 一氧化氮, 一氧化碳, 氧化

Abstract: An air extrusion molding method for the preparation of mullite fiber ceramics with high porosity and high temperature stability was developed at a calcination temperature of 1250 ℃. The porous mullite ceramics showed a uniform pore size distribution and a porosity of 96.22%. The porous ceramics was used as the support for perovskite catalysts based on La0.8Sr0.2CoO3-δ, and the catalyst showed excellent activity and stability in the catalytic combustion of NO and CO. Pd doping enhanced the catalyst activity.

Key words: porous mullite fiber ceramics, palladium, supported catalyst, nitric oxide, carbon monoxide, oxidation