Catalytic combustion of hydrocarbons over perovskites
Catalytic combustion of hydrocarbons over perovskites
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DOI：
10.1016/s0926-3373(02)00024-3
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发表时间：
2002-07
影响因子：
22.1
通讯作者：
L. Forni;I. Rossetti
中科院分区：
文献类型：
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作者：
L. Forni;I. Rossetti
讨论了迄今为止在静态和移动的能量生产装置中用于烃的低温催化燃烧的催化剂的优点和缺点。此外，还采用火焰水解法制备了La0.9Ce0.1CoO3 ± δ钙钛矿结构。这证明是一种高表面积、高耐热性的催化剂。在这样的钴矿中的La的Ce的部分取代导致相对低的表面活性，但高的体氧流动性，导致高的面内活性的甲烷的催化无焰燃烧。还发现了在沉积氧化铝底漆之后，通过浸涂堇青石蜂窝状载体来支撑如此制备的活性相的最佳操作条件。该催化剂具有良好的活性和耐久性，可用于甲烷的环境友好低温燃烧。
The advantages and disadvantages of the catalysts so far employed or proposed for the low temperature catalytic combustion of hydrocarbons, in both static and mobile energy production devices, are discussed. Furthermore, a La0.9Ce0.1CoO3±δperovskite has been prepared by a recently proposed new flame-hydrolysis (FH) method. This proved a high surface area, thermally highly resistant catalyst. The partial substitution of Ce for La in such a cobaltite led to a relatively low suprafacial activity, but to a high bulk oxygen mobility, leading to high intrafacial activity for the catalytic flameless combustion of methane. The best operating conditions have been also found, for supporting the so prepared active phase, by dip-coating of a cordieritic honeycomb support, after deposition of an alumina primer. A very active and durable catalyst was so obtained, useful for practical application in the environmentally friendly low temperature combustion of methane.