Effect of SO2 Treatment at High Temperature on Soot Oxidation Activity of Cu–Ce–Al Mixed Oxides
Effect of SO2 Treatment at High Temperature on Soot Oxidation Activity of Cu–Ce–Al Mixed Oxides
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DOI：
10.1007/s10562-009-9916-z
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发表时间：
2009-03
影响因子：
2.8
通讯作者：
Xiaodong Wu;Fangjian Lin;D. Weng;Liwei Jia;Meiqing Shen
中科院分区：
文献类型：
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作者：
Xiaodong Wu;Fangjian Lin;D. Weng;Liwei Jia;Meiqing Shen
Cu-Ce-Al 混合氧化物已被证明对烟灰氧化具有活性，在二氧化硫和水存在下进行处理。该催化剂对 800°C 10 小时的水热老化表现出良好的耐受性。然而，湿空气中存在 1,000 ppm SO2 会导致活性明显丧失。 XRD、BET、XPS、TPR 和 FTIR 分析表明，虽然没有观察到清晰的硫酸盐微晶，但表面结构的改变以及氧化还原和 NOx 吸附性能的损失是失活的主要因素。
Cu–Ce–Al mixed oxides, which have been shown to be active for soot oxidation, were treated in the presence of sulfur dioxide and water. This catalyst displayed good tolerance to hydrothermal aging at 800 °C for 10 h. However, the presence of 1,000 ppm SO2in wet air led to a distinct loss of activity. The characterizations of XRD, BET, XPS, TPR and FTIR analyses showed that, although no clear sulfate crystallites were observed, the modifications of surface structure and hereby losses in redox and NOxadsorption properties were main factors of deactivation.