| 钙钛矿型催化剂对VOCs催化燃烧的抗毒性和稳定性研究 |
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| 引用本文： | 沈柳倩,翁芳蕾,袁鹏军,黄海凤. 钙钛矿型催化剂对VOCs催化燃烧的抗毒性和稳定性研究[J]. 分子催化, 2008, 22(4) |
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| 作者姓名： | 沈柳倩 翁芳蕾 袁鹏军 黄海凤 |
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| 作者单位： | 浙江工业大学,生物与环境工程学院,浙江,杭州,310014 |
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| 基金项目： | 浙江省科技厅重大专项基金 |
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| 摘 要： | 采用共沉淀法制备了钙钛矿型La0.8Cu0.2MnO3和La0.8Sr0.2MnO3催化剂,考察了两种催化剂对含硫、含氯VOCs气体催化燃烧的抗毒性和稳定性.结果发现,两种催化剂具有良好的抗氯性,但在SO2存在下会出现中毒失活现象,相比较而言,La0.8Sr0.2MnO3比La0.8Cu0.2MnO3具有更好的抗硫性和结构稳定性;采用XRD和XPS分析方法研究催化剂硫中毒机理,发现其失活原因在于催化剂表面生成CuSO4和SrSO4,形成屏蔽效应导致催化剂失活.
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| 关 键 词： | VOCs 催化燃烧 钙钛矿型 抗毒性 稳定性 |
Research on the Poison Resistance and Stabilization of the Perovskite Catalysts for VOCs Catalytic Combustion |
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| SHEN Liu-qain,WENG Fang-lei,YUAN Peng-jun,HUANG Hai-feng. Research on the Poison Resistance and Stabilization of the Perovskite Catalysts for VOCs Catalytic Combustion[J]. Journal of Molecular Catalysis (China), 2008, 22(4) |
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| Authors: | SHEN Liu-qain WENG Fang-lei YUAN Peng-jun HUANG Hai-feng |
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| Abstract: | The La0.8Cu0.2MnO3 and La0.8Sr0.2MnO3 perovskite catalysts were prepared by coprecipitation. The poison resistance to sulfur and chlorin contained VOCs and the reaction stabilization for the two catalysts was investigated. The result showed that both two catalysts had good chlorine resistance, but would got poisoned at the presence of SO2. La0.8Sr0.2MnO3 had better sulfur poisoning resistance and structural stabilization than La0.8Cu0.2MnO3. XRD and XPS techniques were employed to exploring the poisoning mechanism, and it was found that the deactivation of the catalysts under SO2 is due to the forming of CuSO4 and SrSO4 on the surface of the catalysts. |
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| Keywords: | VOCs Catalytic combustion Perovskite Poison resistance Stabilization |
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