摘要
以堇青石为第一载体 ,涂覆氧化铝及掺杂稀土离子的氧化铝作为第二载体 ( Washcoat) ,La0 .8Sr0 .2 Mn O3 为活性组分 ,二甲苯完全氧化为探针反应 ,用 BET、XRD等技术研究了复合载体及其制成的燃烧催化剂的催化性能 .结果表明氧化铝涂层的质量含量为 5%～ 1 0 %时活性较好 ;稀土离子 La,Y有阻止氧化铝涂层丧失比表面的功能 ,其中以 La1 0 Al1 0 /Cord和Y1 0 Al1 0 /Cord(符号表示见本文 )效果最好 .
La 0.8 Sr 0.2 MnO3(LSM) Catalyst was supported on the cordierite which was precoated with γ-Al2O3 or Al2O3 added by rare earth oxides.The catalystic activity was examined by Xylene completely oxidation.The structure and the properties of precoated cordierite support and corresponding catalyst were investigated by means of XRD and BET.It is shown that,catalystic activity is better effective when LSM is supported on the pre-coated support 5Al/cord or 10Al/cord.The oxides of La and Y could hinder the sintering of γ-Al2O3 and then stabilize the catalyst.LSM/La10Al10/cord and LSM/Y10Al10/cord have a good catalystic activity seperately for Xylene completely oxidation.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
2000年第4期398-401,共4页
Journal of Inner Mongolia University：Natural Science Edition
基金
国家自然科学基金资助项目!(29663001)
关键词
氧化铝涂层
燃烧催化剂
蜂窝状堇青石载体
cordierite
γ-Al_2O_3 washcoat
La_(0.8)Sr_(0.2) MnO_3
combustion catalyst
