采用共沉淀法制备了一系列CexZr0.9-xLa0.1O1.95-Al2O3储氧材料(其中CexZr0.9-xLa0.1O1.95与Al2O3的质量比为1;x=0,0.3,0.5,0.7和0.9),以其为载体,制备了一系列负载铁基整体式催化剂.考察了该系列催化剂催化甲烷燃烧反应性能,并用低温N2吸附-脱附、储氧能力测试、X射线衍射和H2程序升温还原等手段对载体和催化剂进行了表征.活性测试结果表明.当x=0.7时,催化剂活性最高,可在V(CH4)=1%和50000h-1条件下使甲烷465℃起燃,615℃完全转化.CexZr0.9-xLa0.1O1.95-Al2O3样品同时具有较高的储氧能力、较高的比表面积和抗热老化能力.当x=0.5和0.7时,催化剂载体以CeZrLaAlO固溶体存在,抗老化能力最好,且x=0.7时,催化剂最易被还原.
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