新型多孔莫来石纤维陶瓷负载La_(0·8)Sr_(0·2)CoO_(3-δ)钙钛矿催化剂(英文)  

A Novel Porous Mullite Fiber Ceramics as a Support for La_(0.8)Sr_(0.2)CoO_(3-δ) Perovskite Catalysts

作　　者：段碧林[1] 曾令可[1] 刘平安[1] 税安泽[1] 王小华[2] 

机构地区：[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

出　　处：《催化学报》2006年第11期940-942,共3页

基　　金：Supported bythe National Natural Science Foundation of China (50276017) ;the Natural Science Foundation of Guang-dong Province (2005B10301026) .

摘　　要：利用空气挤压排液成型法在1 250 ℃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.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 1 250℃. The porous mulllte 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.

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 

分 类 号：O643.36[理学—物理化学]