LaFe_XAl_(12-X)O_(19)催化剂制备及其对甲烷催化燃烧活性的研究  

Preparation of LaFe_XAl_(12-X)O_(19) Catalysts and Investigation on Catalytic Activity of Methane Combustion

作　　者：任晓光[1] 郑建东[1] 宋永吉[2] 马君昌[3] 

机构地区：[1]北京石油化工学院 [2]北京化工大学化学工程学院 [3]沈阳工业大学石油化工学院

出　　处：《石油与天然气化工》2007年第6期441-443,447,共4页Chemical engineering of oil & gas

基　　金：国家自然科学基金资助项目(20476012);北京市属;市管高校人才强教计划资助项目-清洁燃料技术开发(BJJWR20051102)

摘　　要：用共沉淀法制备Fe做为活性组分的一系列六铝酸盐催化剂LaFe_XAl_(12-X)O_(19),通过BET、XPS、XRD等实验技术,对催化剂的结构和性质进行了考察。主要考察了Fe的取代量对催化剂结构以及对甲烷催化燃烧活性的影响。结果表明:催化剂在1200℃焙烧后可以形成完整的六铝酸盐晶型,同时具有较高的催化性能和高温稳定性,铁离子的取代量对于催化剂的特性有较大的影响。由于铁的加入催化剂的活性得到明显提高,其中以LaFe_XAl_(12-X)O_(19)催化剂的活性最好。In this paper,a series of catalysts LaFexAl12-xO19 were prepared by co-precipitation,in which Fe ions was the active component.The structure and properties of LaFex Al12-x O19 were investigated by using BET,XPS,XRD techniques.It was the main aim to compare the influence of Fe ions content on the catalyst structure and catalystic activity of methane combustion.The results showed that the catalyst with good crystallinity was obtained after calcination under oxygen at 1200 ℃.The amount of introduced iron has much effect on the properties of catalysts.Catalytic activity is strongly enhanced by iron incorporation.LaFe2Al10O19 has the higher catalytic activity in methane combustion.

关 键 词：甲烷 催化燃烧 铁取代 六铝酸盐 活性 

分 类 号：O643.3[理学—物理化学]