| Influence of NO on the Reduction of NO2 with CO over Pt/SiO2 in the Presence of O2 |
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| 作者姓名： | 李明时 |
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| 作者单位： | Key Laboratory of Fine Petrochemicals, Department of Chemical Engingeering, Jiangsu Polytechnic University, Changzhou, Jiangsu 213164, China |
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| 基金项目： | Project supported by Jiangsu Polytechnic University （No. ZMF05020020）. |
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| 摘 要： | Reduction of NO2 with CO in the presence of NO and excess oxygen, a model mixture for flue gas, over a 0.1% Pt/SiO2 catalyst was studied. The related reaction mechanisms, such as oxidation of CO and NO, were discussed. It was found that there was a narrow temperature window （180-190 ℃） for the reduction of NO2 by CO. When the temperature was lower than the lower limit of the window, the reduction hardly occurred, while when the temperature was higher than the upper limit of the window, the direct oxidation of CO by O2 occurred and thereby NO2 could not be effectively reduced by CO. The presence of NO shifted the window to higher temperatures owing to the inhibition effect of NO on the activation of O2 on Pt, which made it possible to reduce NO2 by CO in flue gas.
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| 关 键 词： | 二氧化氮 催化还原 脱除 烟道气 一氧化碳 氧气 铂/二氧化硅 |
| 修稿时间： | 2006-08-282006-12-04 |
Influence of NO on the Reduction of NO2 with CO over Pt/SiO2 in the Presence of O2 |
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| LI Ming-Shi, SESHAN, LEFFERTS K., LEFFERTS Leon.Influence of NO on the Reduction of NO2 with CO over Pt/SiO2 in the Presence of O2[J].Chinese Journal of Chemistry,2007,25(4):435-438. |
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| Authors: | LI Ming-Shi SESHAN LEFFERTS K LEFFERTS Leon |
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| Institution: | 1.Key Laboratory of Fine Petrochemicals, Department of Chemical Engingeering, Jiangsu Polytechnic University, Changzhou, Jiangsu 213164, China; 2. Catalytic Processes and Materials, Faculty of Science and Technology, University of Twente, Institute of Mechanics, Processes and Control-Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands |
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| Abstract: | Reduction of NO2 with CO in the presence of NO and excess oxygen, a model mixture for flue gas, over a 0.1% Pt/SiO2 catalyst was studied. The related reaction mechanisms, such as oxidation of CO and NO, were discussed. It was found that there was a narrow temperature window (180–190 °C) for the reduction of NO2 by CO. When the temperature was lower than the lower limit of the window, the reduction hardly occurred, while when the temperature was higher than the upper limit of the window, the direct oxidation of CO by O2 occurred and thereby NO2 could not be effectively reduced by CO. The presence of NO shifted the window to higher temperatures owing to the inhibition effect of NO on the activation of O2 on Pt, which made it possible to reduce NO2 by CO in flue gas. |
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| Keywords: | removal of NO2 flue gas oxidation of CO platinum |
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