| 甲烷催化燃烧NOx排放特性的数值模拟 |
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| 引用本文： | 王鹏,贾志刚,元继宏,姚晋国. 甲烷催化燃烧NOx排放特性的数值模拟[J]. 北京化工大学学报(自然科学版), 2019, 46(5): 16-22. DOI: 10.13543/j.bhxbzr.2019.05.003 |
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| 作者姓名： | 王鹏 贾志刚 元继宏 姚晋国 |
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| 作者单位： | 1. 北京化工大学 化学工程学院, 北京 100029;2. 华晋焦煤有限责任公司, 吕梁 033000 |
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| 基金项目： | 国家自然科学基金（51476006） |
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| 摘 要： | 采用详细表面反应机理与气相反应机理GRI 3.0对甲烷-空气混合气体在微型管道内的催化燃烧过程进行二维数值模拟，讨论了不同甲烷浓度对NOx排放量的影响，并对不同孔径内的浓度场、温度场与流场进行了研究。模拟结果表明：甲烷浓度的提高增加了反应器的排烟温度和NOx排放量；孔道内径通过影响气相反应速率和催化反应速率改变了孔道内的温度场和速度场，进而影响了NOx的生成；孔径的减小使得反应器的单位面积放热量和NOx排放量均降低。以上结果可为优化催化反应器设计、降低其NOx排放量提供参考。
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| 关 键 词： | 催化燃烧 微型管道 数值模拟 甲烷 氮氧化物 |
| 收稿时间： | 2019-04-12 |
Numerical simulation study of the NOx emission characteristics of the catalytic combustion of methane |
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| WANG Peng,JIA ZhiGang,YUAN JiHong,YAO JinGuo. Numerical simulation study of the NOx emission characteristics of the catalytic combustion of methane[J]. Journal of Beijing University of Chemical Technology, 2019, 46(5): 16-22. DOI: 10.13543/j.bhxbzr.2019.05.003 |
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| Authors: | WANG Peng JIA ZhiGang YUAN JiHong YAO JinGuo |
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| Affiliation: | 1. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029;2. Huajin Coking Coal Co., Ltd., Lyuliang 033000, China |
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| Abstract: | The catalytic combustion of methane and air mixtures in a micro-tube has been numerically simulated by using a detailed surface reaction and a gas phase reaction mechanism GRI3. 0. The effects of varying the methane concentration on NOx emissions were investigated, and the flow, temperature and concentration fields of channels with different pore sizes were studied. The simulation results show that increasing concentrations of methane, ledd to higher flue gas temperatures and NOx emissions from the reactor. The pore size affects both the gas phase reaction rate and the catalytic reaction rate, by changing the temperature field and velocity field in the channel, thereby affecting the formation of NOx. Decreasing the pore size results in lower heat release values per square meter and lower NOx emissions, which provides a useful reference for designing catalytic reactors and reducing NOx emissions. |
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| Keywords: | catalytic combustion, micro-tube, numerical simulation, methane, x')" >NOx |
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