镧系六铝酸盐催化剂的制备及其催化甲烷燃烧活性研究  

Synthesis of La-hexaaluminate Catalysts and Research on Their Catalytic Activity of Methane Combustion

作　　者：郑建东[1] 侯豹[1] 葛秀涛[1] 章守权[1] 

机构地区：[1]滁州学院材料与化学工程学院,滁州239000

出　　处：《材料导报》2012年第20期102-104,114,共4页Materials Reports

基　　金：安徽省教育厅自然科学研究重点项目(KJ2012A213);滁州学院校级重点教研项目(2011jyz007);安徽省应用化学省级重点学科建设(200802187C)

摘　　要：用共沉淀法制备了镧系六铝酸盐LaMnxAl12-xO19(x=0、1、2、3、4、5、6)催化剂,通过X射线衍射、差热分析、扫描电镜和比表面积分析等实验技术及甲烷催化燃烧,对催化剂的结构和性质进行了考察。研究了锰离子掺杂对催化剂结构以及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,且具有较高的催化性能和高温稳定性,不同含量的Mn离子掺杂对催化剂的比表面积和活性有较大的影响。LaMn2Al10O19催化剂具有较好的活性,其起燃温度(T10%/℃)为506℃,完全转化温度(T90%/℃)为696℃。A series of La-hexaaluminate catalysts LaMnxAl12-xO19（x：0,1,2,3,4,5,6） were prepared by co precipitation method. The structure and the properties of these catalysts were investigated by using XRD, TG-DSC, SEM, BET techniques and activities of methane catalytic combustion. The results show that the catalyst with good crystal is obtained after calcination at 1200℃. All catalysts have the high catalytic activity and stability. The substi tute of Mn has much effect on the properties of catalysts. LaMn2 All0 O19 has the higher catalytic activity in methane combustion and its light-off T10% is 506℃, total conversion T90% is 696℃.

关 键 词：六铝酸盐 掺杂 甲烷催化燃烧 活性 

分 类 号：O643[理学—物理化学]