Autonomous Improvement in the Catalytic Activity of KVO3/SiC for Soot Oxidation under Practical Gaseous Conditions
Autonomous Improvement in the Catalytic Activity of KVO3/SiC for Soot Oxidation under Practical Gaseous Conditions
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实际气体条件下 KVO3/SiC 烟灰氧化催化活性的自主改进
DOI：
10.1246/cl.1998.367
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发表时间：
1998
影响因子：
1.6
通讯作者：
S. Kushiyama
中科院分区：
文献类型：
--
作者：
Zhen Zhao;A. Obuchi;J. Uchisawa;A. Ogata;S. Kushiyama
研究了反应气组成对KVO 3/SiC催化燃烧碳烟的影响。通过在含SO2的反应气体中重复程序升温反应（TPR）的测量，KVO 3-SiC的活性增加。SEM和EDX观察表明，新鲜样品表面仅存在KVO 3，而使用过的样品表面形成了K2 SO 4、V2 O 5和KVO 3的混合物，表明在反应过程中混合金属氧化物转变为简单的硫酸盐和氧化物，在实际条件下更稳定，催化活性更高。
The effect of reactant gas composition on the catalytic combustion of soot by KVO3/SiC are investigated. The activity of KVO3-SiC increased by repeating the measurement of temperature-programmed reaction (TPR) under reaction gases containing SO2. SEM and EDX observations showed that only KVO3 was present on the surface of the fresh sample, but a mixture of K2SO4,V2O5 and KVO3 was formed on the used sample, suggesting that during the reaction process the mixed metal oxide change into simple sulfate and oxide which are more stable and catalytically active under practical conditions.