【摘要】 用微乳法和异丙醇-聚乙二醇法制备了磁铅石型稀土高温燃烧催化剂L aM nA l11O19,并用XRD,BET和TPR技术及甲烷燃烧活性对其进行了表征,实验结果表明,微乳法和异丙醇-聚乙二醇法在1400℃的高温下焙烧3小时均可制备出主相结构为L aM nA l11O19的六铝酸盐催化剂,异丙醇-聚乙二醇法制备的L aM nA l11O19具有较高的比表面,微乳法制备的L aM nA l11O19具有较高甲烷催化燃烧活性。更多还原

【Abstract】 Catalysts were prepared by microemulsion method and iso-propyl alcohol polyethyleneglycol method.The effects of preparation methods on crystal structure and properties of the catalysts were investigated by means of XRD,BET,H₂-TPR and activity evaluation for methane combustion.The results show that the LaMnAl₁₁O₁₉ catalyst could be synthesized at 1400℃ for 3h by the two methods.The specific surface area of LaMnAl₁₁O₁₉ catalyst prepared by iso-propyl alcohol-polyethyleneglyco method is beneficial to maintain high surface area.Activity for methane combustion of catalyst come from microemulsion method was better.更多还原