| 碳酸钠促进选择性非催化还原脱硝的动力学模型与模拟 |
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| 引用本文： | 韩奎华,路春美.碳酸钠促进选择性非催化还原脱硝的动力学模型与模拟[J].中国化学工程学报,2007,15(4):512-519. |
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| 作者姓名： | 韩奎华 路春美 |
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| 作者单位： | School of Energy and Power Engineering, Shandong University, Jinan 250061, China |
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| 基金项目： | 山东省自然科学基金，Science and Technology Program for Environment Protection of Shandong Province |
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| 摘 要： | Abstract The detailed kinetic model of selective non-catalytic reduction （SNCR） of nitric oxide, including so-dium species reactions, was deyeloped on the basis of recent studies on thermal DeNOx mechanism, NOxOUTmechanism and promotion mechanism of Na2CO3. The model was validated by comparison with several experi-mental findings, thus providing an effective tool for the primary and promoted SNCR process simulation. Experimental and simulated results show part-per-million level of sodium carbonate enhances NO removal efficiency andextend the effective SNCR temperature range in comparison with use of a nitrogen agent alone. The kinetic modeling, sensitivity and rate-of-production analysis suggest that the performance improvement can be explained as ho-mogeneous sodium species reactions producing more reactive OH radicals. The net result of sodium species reac-tions is conversion of H2O and inactive HO2 radicals into reactive OH radicals, i.e. H2O＋HO2=3OH, which enhances the SNCR performance of nitrogen agents by mainly increasing the production rate of NH2 radicals. More-over, N2O and CO are eliminated diversely via the reactions Na＋N20=NaO＋N2, NaO＋CO=Na＋CO2 andNaO2＋CO =NaO＋CO2, in.the pro.moted SNCR process, especially in the NOxOUT process.
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| 关 键 词： | 动力模型 选择性非接触反应还原 氮氧化物 模拟 钠碳酸盐 机制 |
| 收稿时间： | 29 September 2006 |
| 修稿时间： | 2006-09-29 |
Kinetic Model and Simulation of Promoted Selective Non-catalytic Reduction by Sodium Carbonate |
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| Kuihua HAN,Chunmei LU,.Kinetic Model and Simulation of Promoted Selective Non-catalytic Reduction by Sodium Carbonate[J].Chinese Journal of Chemical Engineering,2007,15(4):512-519. |
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| Authors: | Kuihua HAN Chunmei LU |
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| Affiliation: | School of Energy and Power Engineering, Shandong University, Jinan 250061, China;School of Energy and Power Engineering, Shandong University, Jinan 250061, China |
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| Abstract: | The detailed kinetic model of selective non-catalytic reduction (SNCR) of nitric oxide, including sodium species reactions, was developed on the basis of recent studies on thermal DeNOx mechanism, NOxOUT mechanism and promotion mechanism of Na2CO3. The model was validated by comparison with several experimental findings, thus providing an effective tool for the primary and promoted SNCR process simulation. Experimental and simulated results show part-per-million level of sodium carbonate enhances NO removal efficiency and extend the effective SNCR temperature range in comparison with use of a nitrogen agent alone. The kinetic modeling, sensitivity and rate-of-production analysis suggest that the performance improvement can be explained as homogeneous sodium species reactions producing more reactive OH radicals. The net result of sodium species reactions is conversion of H2O and inactive HO2 radicals into reactive OH radicals, i.e. H2O HO2=3OH, which enhances the SNCR performance of nitrogen agents by mainly increasing the production rate of NH2 radicals. Moreover, N2O and CO are eliminated diversely via the reactions Na N2O=NaO N2, NaO CO=Na CO2 and NaO2 CO-NaO CO2, in the promoted SNCR process, especially in the NOxOUT process. |
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| Keywords: | kinetic model simulation selective non-catalytic reduction nitric oxide sodium carbonate mechanism |
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