| 当量比燃烧天然气发动机铑基三效催化器次生污染物研究 |
| |
| 引用本文： | 唐飞,钱叶剑,孟顺,余自洋,边顺.当量比燃烧天然气发动机铑基三效催化器次生污染物研究[J].内燃机工程,2021,42(6):70-79. |
| |
| 作者姓名： | 唐飞 钱叶剑 孟顺 余自洋 边顺 |
| |
| 作者单位： | 合肥工业大学动力机械及工程系,合肥230009 |
| |
| 基金项目： | 高功率密度汽油机换气过程优化及其对发动机性能影响机理的研究,国家自然科学基金项目（面上项目，重点项目，重大项目） |
| |
| 摘 要： | 建立了一种适用于当量比燃烧天然气发动机的Rh基三效催化器(TWC)整体模型，研究了排气温度和组分对TWC系统次生污染物N2O和NH3生成特性的影响。结果表明：N2O主要在起燃和低温(400～605 K)下通过CO还原NO反应生成；高温状态下(>850 K)NH3通过H2还原NO反应生成，H2来源于蒸汽重整(SR)和水煤气变换(WGS)反应。H2浓度的增加促进了N2O和NH3生成，高温下N2O会与H2发生还原反应，导致N2O有所降低。H2O和CH4对N2O和NH3生成的影响随着温度变化而变化。在一定温度范围内，随着O2浓度的增加，NH3生成大幅降低；高温下高O2浓度会促进N2O生成。研究还发现，排气中O2浓度在4000 × 10-6左右时，排温控制在580～850 K，能实现N2O和NH3近零排放。
|
| 关 键 词： | 当量比燃烧 天然气发动机 三效催化器 N2O排放 NH3生成 |
| 收稿时间： | 2021/1/17 0:00:00 |
| 修稿时间： | 2021/4/2 0:00:00 |
Investigation on Generation of Secondary Pollutant from Rh-Only Three Way Catalytic in a Natural Gas Engine Under Stoichiometric Conditions |
| |
| TANG Fei,QIAN Yejian,MENG Shun,YU Ziyang,BIAN Shun.Investigation on Generation of Secondary Pollutant from Rh-Only Three Way Catalytic in a Natural Gas Engine Under Stoichiometric Conditions[J].Chinese Internal Combustion Engine Engineering,2021,42(6):70-79. |
| |
| Authors: | TANG Fei QIAN Yejian MENG Shun YU Ziyang BIAN Shun |
| |
| Affiliation: | School of Automotive and Transportation Engineering,Hefei University of Technology,School of Automotive and Transportation Engineering,Hefei University of Technology,School of Automotive and Transportation Engineering,Hefei University of Technology,School of Automotive and Transportation Engineering,Hefei University of Technology,School of Automotive and Transportation Engineering,Hefei University of Technology |
| |
| Abstract: | |
| |
| Keywords: | stoichiometric combustion natural gas engine TWC N2O emission NH3 formation |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《内燃机工程》浏览原始摘要信息 |
|
点击此处可从《内燃机工程》下载全文 |
|
