| SO2对La0.8K0.2Cu0.05Mn0.95O3钙钛矿催化剂氧化碳烟的影响 |
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| 引用本文： | 乐向晖,张 栖,付名利,黄碧纯,梁 红,叶代启.SO2对La0.8K0.2Cu0.05Mn0.95O3钙钛矿催化剂氧化碳烟的影响[J].无机化学学报,2009,25(7):1170-1176. |
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| 作者姓名： | 乐向晖 张 栖 付名利 黄碧纯 梁 红 叶代启 |
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| 作者单位： | 1. 华南理工大学环境科学与工程学院,广州,510006
2. 广州大学化学化工学院,广州,510006 |
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| 基金项目： | 广东高校科技成果转化项目，广东省自然科学基金，广东省社会发展科技项目，广州市属高校科技项目 |
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| 摘 要： | 采用柠檬酸配位法制备K、Cu掺杂的Lu0.8K0.2Cu0.05Mn0.95O3钙钛矿催化剂,运用程序升温氧化(TPO)考察在不同浓度SO2气氛下La0.8K0.2Cu0.05Mn0.95O3催化剂催化氧化模拟碳黑的性能,并用XRD、FFIR和XPS等进行表征.结果表明,催化剂在0～0.1%的SO2气氛中呈现出不同活性,φSO2≤0.05%的气氛可促进催化剂催化氧化碳黑的活性,当φSO2=0303%,催化剂活性最高;引入φSO2≥0.06%时催化剂活性明显下降.XPS说明表面活性氧的增加是低浓度的SO2促进催化活性的原因,同时XRD、FTIR结果表明高浓度的SO2所产生的大量SO42-是抑制催化剂活性的原因.
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| 关 键 词： | 二氧化硫 钙钛矿催化剂 碳烟氧化 表面活性氧 |
Effect of SO2 on Soot Oxidation over La0.8K0.2Cu0.05Mn0.95O3 Perovskites-type Catalyst |
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| YUE Xiang-hui,ZHANG Xi,FU Ming-Li,HUANG Bi-Chun,LIANG Hong and YE Dai-Qi.Effect of SO2 on Soot Oxidation over La0.8K0.2Cu0.05Mn0.95O3 Perovskites-type Catalyst[J].Chinese Journal of Inorganic Chemistry,2009,25(7):1170-1176. |
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| Authors: | YUE Xiang-hui ZHANG Xi FU Ming-Li HUANG Bi-Chun LIANG Hong and YE Dai-Qi |
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| Affiliation: | College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006,College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006,College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006,College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006,College of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006 and College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006 |
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| Abstract: | La0.8K0.2Cu0.05Mn0.95O3 catalysts were prepared using the citrate acid-complex combustion method. Catalysts were characterized with XRD, FTIR, XPS. Temperature programmed oxidation(TPO) tests were performed to evaluate the catalytic activity for soot oxidation in a feed gas containing various concentrations of SO2. The TPO results revealed that the catalysts exhibited different activities with 0~0.1% SO2 in feed gas. The performance of the catalyst was enhanced with SO2 concentration below 0.05%, and 0.03% SO2 resulted in the highest activity. However, the soot oxidation rate decreased when the SO2 feed concentration was above 0.06%. The results of XPS indicated that the increase of weakly chemisorbed O- surface species was responsible for the excellent performance of La0.8K0.2Cu0.05Mn0.95O3 with lower concentration of SO2. The XRD and FTIR results revealed that plentiful SO42- was produced on the catalyst surface when SO2 concentration was high, which could account for the loss of activity of the La0.8K0.2Cu0.05Mn0.95O3 catalyst. |
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| Keywords: | sulfur dioxide perovskites-type catalyst soot oxidation superficial oxygen |
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