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采用反相微乳液法制备了BaMAl1 1 O1 9-α(M =Mn ,Co ,Ce)催化剂 ,研究了M对催化剂相组成、比表面积和甲烷催化燃烧活性的影响 .Mn促进六铝酸盐的形成 ,Mn基催化剂比表面积虽低 ,甲烷燃烧活性却较高 .Ce基催化剂的热稳定性高 ,比表面积大幅度增加 ,但甲烷催化燃烧活性比Mn基催化剂低 .Ce和Mn的共同作用使CeO2 /BaMnAl1 1 O1 9-α催化剂不仅比表面积较大 ,而且具有较高的甲烷燃烧活性 .在 10 0h连续试验中 ,CeO2 /BaMnAl1 1 O1 9-α催化剂活性稳定 ,有望成为催化热汽轮机燃烧器的潜在催化剂之一 .
The effects of M on the phase composition, specific surface area and catalytic combustion of methane were studied by using reversed-phase microemulsion method. The effects of Mn on the hexaaluminate Although the specific surface area of Mn-based catalysts is low, the activity of methane combustion is high.Ce-based catalysts have high thermal stability and large specific surface area, but their methane catalytic activity is lower than that of Mn-based catalysts. The CeO2 / BaMnAl1 1 O1 9-α catalyst not only has a large specific surface area but also has a high methane combustion activity. The CeO2 / BaMnAl1 1 O1 9-α catalyst is stable in a continuous 10h test and is expected to be a catalytic thermal turbine combustor One of the potential catalysts.