对CH4O/H2/NH3混合燃烧中的污染物形成的等价比的影响
Jingyun Sun1, Qianqian Liu1, Mingyan Gu1
1School of Energy and Environment, Anhui University of Technology, Ma'anshan 243002, China.
Molecules (Basel, Switzerland)
|January 11, 2024
概括
这项研究揭示了等价比如何影响CH4O/H2/NH3燃烧中的污染物形成. 降低等效比率通常会加速燃料分解,并改变CO,CO2和NOx形成路径,在较低的比率下NOx显著增加.
科学领域:
- 燃烧化学 燃烧化学是什么
- 污染物形成的过程
- 三元燃料分析 三元燃料分析
背景情况:
- 了解混合燃料燃烧中的污染物形成对于排放控制至关重要.
- 相当比率显著影响燃烧动力学和产品分布.
- 甲醇 (CH4O), (H2) 和氨 (NH3) 混合物具有复杂的燃烧特性.
研究的目的:
- 调查等效比对CH4O/H2/NH3三元燃料燃烧中的污染物 (CO,CO2,NOx) 形成的影响.
- 在不同等效率下分析控制污染物形成的分子层次机制.
- 阐明反应路径和中间体在污染物产生中的作用.
主要方法:
- 对CH4O/H2/NH3三元燃料燃烧的计算分析.
- 在一系列等效比率 (φ) 中调查污染物形成特征.
- 详细的反应路径分析以确定关键的中间体和路径.
主要成果:
- 降低等效比率加快了CH4O,H2和NH3的分解,峰值消耗在φ=0.33.3时.
- 二氧化碳的形成呈现出反转的U形趋势,峰值在φ=0.5,而二氧化碳的形成与等价比率成反比例.
- 随着等效率的下降,NOx,主要是NO2,随着反应路径的简化和增加的O2可用性而显著增加,特别是在φ=0.66以下.
结论:
- 相当性比是控制CH4O/H2/NH3燃烧中的污染物形成的关键参数.
- 降低的等效比率引入了新的反应途径和中间体,影响了CO,CO2和NOx产量.
- 在较低的等效比率下,简化转化NH3为NO显著增加了NOx的形成.
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