K_2MnAl_(11)O_(19)六铝酸盐催化剂的制备及其催化甲烷燃烧性能的研究  

Synthesis of K_2MnAl_(11)O_(19) Catalysts and Investigation on Their Catalytic Activity of Methane Combustion

作　　者：郑建东[1] 任晓光[2] 葛秀涛[1] 

机构地区：[1]滁州学院材料与化学工程学院,滁州239000 [2]北京石油化工学院化学工程系,北京102617

出　　处：《材料导报》2012年第2期117-120,共4页Materials Reports

基　　金：安徽省教育厅自然科学研究项目(KJ2010B145);国家自然科学基金(21076025);安徽省应用化学省级重点学科建设(200802187C)

摘　　要：采用共沉淀法、溶胶-凝胶法和反相微乳液法制备六铝酸盐催化剂K2MnAl11O19,利用XRD、BET和TG-DTA技术及甲烷燃烧活性对催化剂进行了表征和活性验证。结果表明,3种方法所制备催化剂经1200℃焙烧4h后均可以形成完整的六铝酸盐晶型,同时都具有高的催化性能和高温稳定性,其中反相微乳液法制备的K2MnAl11O19催化剂具有较高的比表面积和甲烷催化燃烧活性,起燃温度T10%=458℃,至676℃(T90%)甲烷完全转化。K2MnAl11O19 catalysts were prepared by co-precipitation method, hydrolysis of metal alkoxide method and reverse microemulsion method. The effects of preparation methods on crystal structure and properties of the catalysts were investigated by means of XRD, BET, TG-DTA and activity evaluation for methane combustion. The results showed that the catalyst with good crystallinity was obtained after calcination at 1200℃ for 4h by the three methods. At the same time the catalysts have the high catalytic activity and stability. Thi℃ catalyst prepared by reverse microemulsion method maintains high surface area and has a higher catalytic activity with T10℃ as 458℃ and T90% as 676℃ for methane combustion.

关 键 词：甲烷 催化燃烧 六铝酸盐 

分 类 号：O643[理学—物理化学]