La_xCa_yBa_zMn_2Al_(10)O_(19-δ)六铝酸盐催化剂制备及其甲烷燃烧催化活性  

Preparation of La_xCa_yBa_zMn_2Al_(10)O_(19-δ) catalysts and their catalytic activity for methane combustion

作　　者：任东明[1] 宋永吉[2] 任晓光[2] 徐娟[2] 

机构地区：[1]北京化工大学,北京100029 [2]北京石油化工学院,北京102617

出　　处：《工业催化》2008年第9期22-25,共4页Industrial Catalysis

基　　金：国家自然科学基金资助项目(20476012);北京市自然科学基金资助项目(8032007);北京市属;市管高校人才强教计划资助项目(BJJWR20051102)

摘　　要：采用共沉淀法制备了系列LaxCayBazMn2Al10O19-δ六铝酸盐催化剂,并用XRD、BET和甲烷燃烧活性对其进行了表征,研究了不同Ba、La和Ca调变量对所制备催化剂的化学结构及甲烷催化燃烧活性的影响。结果表明,Ba和La调变量对催化剂结构和活性影响较大,当其组成为La0.1Ca0.3Ba0.6Mn2Al10O19-δ时活性最好。La3+和Ca2+可以部分替代Ba2+进入其骨架结构的镜面,并能有效改善其活性。LaxCayBaxMn2Al10O19-δ catalysts were prepared by coprecipitation method. Influence of the amount of Ba, La and Ca on structure and catalytic activity of the catalysts for methane combustion were investigated by XRD and BET. The experimental results showed that the structure and activity were much influenced by the amount of Ba and La,and LaxCayBaxMn2Al10O19-δ catalysts exhibited the best catalytic activity; La^3＋ and Ca^2＋ partly substituted Ba^2＋ in the skeleton and enhanced the catalytic activity.

关 键 词：催化化学 催化燃烧 六铝酸盐 甲烷 共沉淀法 

分 类 号：O643.36[理学—物理化学] TQ426.83[理学—化学]