| Ag-ZSM-5催化剂上CH4选择催化还原NOx的研究 |
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| 引用本文： | 石川,程谟杰,曲振平,杨学锋,包信和. Ag-ZSM-5催化剂上CH4选择催化还原NOx的研究[J]. 高等学校化学学报, 2002, 23(4): 628-631 |
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| 作者姓名： | 石川 程谟杰 曲振平 杨学锋 包信和 |
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| 作者单位： | 1. 中国科学院大连化学物理研究所催化基础国家重点实验室, 大连 116023;2. 大连理工大学等离子体物理化学研究室, 大连 116024 |
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| 基金项目： | 国家自然科学基金(批准号:20003011)和“973”计划资助． |
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| 摘 要： | 摘要研究Ag-ZSM-5催化剂上CH4选择性催化还原NOx的反应性能,采用TPD和TPSR技术研究NO和O2共吸附于Ag-ZSM-5催化剂表面形成的吸附物种及其和CH4之间的反应。结果表明,Ag-ZSM-5催化剂上CH4选择性还原NOx活性和选择性较高。NO和O2共吸附在Ag-ZSM-5催化剂上形成的NO3(s)吸附物种能被CH4还原生成N2.在NO3(s)和O2共存的体系中,CH4能优先并选择性还原NO3(s)生成N2.
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| 关 键 词： | Ag-ZSM-5 甲烷 选择性还原 NO3(s)物种 |
| 文章编号： | 0251-0790(2002)04-0628-04 |
| 收稿时间： | 2001-03-21 |
Studies on Selectively Catalytic Reduction of NOx by Methane over Ag-ZSM-5 Catalysts |
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| SHI Chuan,CHENG Mo-Jie,QU Zhen-Ping,YANG Xue-Feng,BAO Xin-He. Studies on Selectively Catalytic Reduction of NOx by Methane over Ag-ZSM-5 Catalysts[J]. Chemical Research In Chinese Universities, 2002, 23(4): 628-631 |
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| Authors: | SHI Chuan CHENG Mo-Jie QU Zhen-Ping YANG Xue-Feng BAO Xin-He |
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| Affiliation: | 1. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;2. Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | Ag-ZSM-5 catalysts were investigated for the selectively catalytic reduction of NO by methanein the excess of oxygen. The adsorption properties of NOx and the reaction of absorbed NOx with CH4 werestudied through TPD and TPSR measurements. NOx was effectively and selectively reduced by CH4 overAg-ZSM-5 catalysts. The co-adsorption of NO and O2 over Ag-ZSM-5 catalyst led to the formation of ad-sorbed NO3 species, which could be effectively reduced by CH4. Even in the presence of O2, NO3 specieswere more reactive than O2. The priority of CH4 reaction with surface NO3-species to form N2 was clearlyobserved. |
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| Keywords: | Ag-ZSM-5 CH4 Selective reduction NO3-species |
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