以甲烷催化燃烧为目标反应,采用以碳酸铵为沉淀剂的共沉淀法制备了Mn取代的镧六铝酸盐催化剂.在不同的焙烧温度下通过SEM、XRD进行物相分析,确定了最佳焙烧温度.借助于BET、FT-IR、XRD进行了物性表征,研究了不同碳酸铵加入量下所制备催化剂的化学结构及其对甲烷催化燃烧活性的影响.结果表明,焙烧温度在1200℃左右焙烧4h可以形成完整的六铝酸盐晶型.当n(碳酸铵)/n(M2+)(其中M2+为带两个正电荷的金属离子)=1.5时,所得催化剂的活性最高,起燃温度(T10%)为471℃,完全转化温度T90%为662℃.
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