Abstract: K2MnAl11O19 catalysts were prepared by co-precipitation or hydrolysis of metal alkoxide. The effects of preparation methods on crystal structure and properties of the catalysts were investigated by means of XRD,BET,SEM,TG-DTA and activity evaluation for methane combustion. The results showed that the catalyst with good crystallinity was obtained after calcination at 1200 ℃ for 4 h by these two methods. At the same time the catalysts had high catalytic activity and stability. The catalyst prepared by hydrolysis of metal alkoxide maintained high surface area and had higher catalytic activity for methane combustion.

摘要： 介绍了共沉淀法和异丙醇盐水解法制备了六铝酸盐催化剂K2MnAl11O19，用XRD、BET、SEM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，两种方法所制备的催化剂经1200 ℃焙烧4 h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，其中异丙醇盐水解法制备的K2MnAl11O19催化剂具有较高的比表面积和甲烷催化燃烧活性。