| 具有高抗水、抗硫性的CeO2/TiO2-ZrO2催化剂脱硝性能研究 |
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| 引用本文： | 闫志勇,胡建飞,徐鸿. 具有高抗水、抗硫性的CeO2/TiO2-ZrO2催化剂脱硝性能研究[J]. 动力工程, 2011, 31(1) |
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| 作者姓名： | 闫志勇 胡建飞 徐鸿 |
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| 作者单位： | 1. 中国计量学院计量测试工程学院,杭州,310018
2. 中国计量学院计量测试工程学院,杭州,310018;太原理工大学电气与动力工程学院,太原,030024 |
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| 基金项目： | 浙江省重大科技专项优先主题项目子课题资助项目(2007C03004); 浙江省自然科学基金资助项目(Y5080087) |
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| 摘 要： | 采用浸渍法制备了CeO2/TiO2-ZrO2催化剂,用于NH3选择性催化还原NO.研究了CeO2负载量、氧浓度、空速值、氨氮比以及SO2浓度和水蒸气存在的情况对催化剂活性的影响,并运用BET和XRD对催化剂进行了微观表征.结果表明:催化剂中ZrO2的存在有利于增大催化剂比表面积,增强CeO2在催化剂上的分散度,提高了催化剂活性;CeO2/TiO2-ZrO2催化剂表现出高效性和稳定性,当CeO2负载量超过10%、空速值为30000 h-1、反应温度为250～450℃时,脱硝率稳定在94.27%～99.63%;当高浓度SO2和水蒸气同时存在时,随着反应温度的升高,NO的脱除率逐渐提高,当反应温度高于400℃时,脱硝率仍可达到92%以上,表明CeO2/TiO2-ZrO2催化剂具有很强的抗硫性和抗水中毒性.
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| 关 键 词： | 催化剂 选择性催化还原 脱硝率 负载量 活性 |
Denitrification Property of Catalyst CeO_2/TiO_2-ZrO_2 with Strong Hydrothermal Stability and Sulfur Tolerance |
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| YAN Zhi-yong , HU Jian-fei , XU Hong. Denitrification Property of Catalyst CeO_2/TiO_2-ZrO_2 with Strong Hydrothermal Stability and Sulfur Tolerance[J]. Power Engineering, 2011, 31(1) |
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| Authors: | YAN Zhi-yong HU Jian-fei XU Hong |
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| Affiliation: | YAN Zhi-yong~1,HU Jian-fei~(1,2),XU Hong~1(1.School of Metrology & Measurement Engineering,China Jiliang University,Hangzhou 310018,China,2.School of Electrical and Power Engineering,Taiyuan University of Technology,Taiyuan 030024,China) |
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| Abstract: | CeO_2/TiO_2-ZrO_2 catalysts were prepared by the impregnation method for selective catalytic reduction of NO with NH_3,while effects of CeO_2 loading on catalyst,O_2 concentration,space velocity,NH_3/NO ratio,SO_2 concentration and water vapour on the catalytic activity investigated and the microstructure of the catalyst characterized by BET and XRD method.Results show that the existence of ZrO_2 in catalyst can raise its specific area and enhance the dispersion of CeO_2 on catalyst,therefore may result in ... |
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| Keywords: | catalyst selective catalytic reduction NO removal efficiency loading content activity |
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