Catalytic combustion of chlorobenzene over MnOx–CeO2 mixed oxide catalysts
Catalytic combustion of chlorobenzene over MnOx–CeO2 mixed oxide catalysts
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DOI：
10.1016/j.apcatb.2008.08.009
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发表时间：
2009-02
影响因子：
22.1
通讯作者：
Xingming Wang;K. Qian;L. Dao
中科院分区：
文献类型：
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作者：
Xingming Wang;K. Qian;L. Dao
采用溶胶-凝胶法制备了一系列不同组成的MnOx-CeO 2复合氧化物催化剂，并将其用于氯代芳烃挥发性有机物模型化合物氯苯（CB）的催化燃烧。结果表明，不同Mn/Ce+Mn配比的MnOx-CeO 2催化剂对炭黑的催化燃烧具有较高的催化活性，其中MnOx（0.86）-CeO 2催化剂的活性最高，炭黑完全燃烧温度为254°C。考察了反应条件的系统变化对炭黑催化燃烧的影响。此外，通过多种表征方法和其他辅助实验研究了MnOx-CeO 2催化剂的稳定性和失活情况。高Mn/Ce+Mn比的MnOx-CeO 2催化剂表现出稳定的高活性，这与其高的去除Cl吸附物种的能力和大量的活性表面氧有关。
A series of MnOx–CeO2mixed oxide catalysts with different compositions prepared by sol–gel method were tested for the catalytic combustion of chlorobenzene (CB), as a model of volatile organic compounds of chlorinated aromatics. MnOx–CeO2catalysts with different ratios of Mn/Ce+Mn were found to possess high catalytic activity in the catalytic combustion of CB, and MnOx(0.86)–CeO2was identified as the most active catalyst, on which the temperature of complete combustion of CB was 254°C. Effects of systematic variation of reaction conditions, including space velocity and inlet CB concentration on the catalytic combustion of CB were investigated. Additionally, the stability and deactivation of MnOx–CeO2catalysts were studied by various characterization methods and other assistant experiments. MnOx–CeO2catalysts with high Mn/Ce+Mn ratios present a stable high activity, which is related to their high ability to remove the adsorbed Cl species and a large amount of active surface oxygen.