| 加压富氧燃烧模式下SOx/NOx强耦合促进SO3形成的机理研究 |
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| 引用本文： | 王学斌,戴高峰,Grigory Yablonsky,Richard LAxelbaum,谭厚章.加压富氧燃烧模式下SOx/NOx强耦合促进SO3形成的机理研究[J].工程热物理学报,2020(1):223-228. |
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| 作者姓名： | 王学斌 戴高峰 Grigory Yablonsky Richard LAxelbaum 谭厚章 |
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| 作者单位： | 西安交通大学热流科学与工程教育部重点实验室;圣路易斯华盛顿大学能源环境化工系洁净煤利用中心 |
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| 基金项目： | 国家自然科学基金资助项目(No.51676157,No.51761125012) |
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| 摘 要： | 加压富氧煤粉燃烧技术由于净发电效率高被认为是最有可能得到应用的燃煤CO2控制技术之一,但受燃烧压力影响,烟气中的酸性气体(SOx/NOx)分压显著提高,导致腐蚀风险加剧,而目前对该问题相关的基础研究很少。本文利用详细反应机理(72组分,428反应),基于实验数据对照,揭示了加压富氧模式下SOx/NOx强耦合促进SO3和NO2形成的协同效应。动力学机理计算结果表明:SOx/NOx的交互作用可促进SO2和NO向SO3和NO2的转化,并且该促进效应在一定的温度和加压条件下十分显著。基于反应路径和敏感性分析,本文最终发展了一个能用于准确预测加压富氧燃烧模式下SO3和NO2在后火焰区形成特性的9步骨架反应机理。
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| 关 键 词： | 加压富氧燃烧 SO3 NO2 耦合机理 协同效应 |
Synergistic Promotion of SO3 Formation with SOx/NOx Coexisting in Pressurized Oxy-combustio |
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| WANG Xue-Bin,DAI Gao-Feng,Grigory Yablonsky,Richard LAxelbaum,TAN Hou-Zhang.Synergistic Promotion of SO3 Formation with SOx/NOx Coexisting in Pressurized Oxy-combustio[J].Journal of Engineering Thermophysics,2020(1):223-228. |
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| Authors: | WANG Xue-Bin DAI Gao-Feng Grigory Yablonsky Richard LAxelbaum TAN Hou-Zhang |
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| Institution: | (MOE Key Laboratory of Thermo-Fluid Science and Engineering,Xi’an Jiaotong University,Xi'an 710049,China;Department of Energy,Environmental&Chemical Engineering,Consortium for Clean Coal Utilization,Washington University in St.Louis,MO 63130,USA) |
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| Abstract: | Pressurized oxy-combustion(POC) is a promising technology that has high power generation efficiency.However,due to high pressure,partial pressure of strong acid gases(SOx-NOx)significantly increases,aggravating the threat of corrosion.The formation of NO2 and SO3 in the gas-phase and their interaction at elevated pressure have not been adequately addressed.In this study,the synergistic promotion of SO3 and NO2 is kinetically evaluated by the detailed mechanism(72 species and 428 reactions) and experiment data.The calculations show that the interaction of SOx and NOx indeed accelerates the conversion rates of NO to NO2 and SO2 to SO3,and the acceleration is much stronger at elevated pressure and lower temperature.Based on ROP analysis and sensitivity analysis,we get a detail mechanism including 9 skeletal reactions,which can be used to accurately predict SO3 and NO2 formation in the post-flame region of pressurized oxy-combustion. |
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| Keywords: | pressurized oxy-combustion SO3 NO2 coupling mechanism synergistic effect |
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