掺杂H2/CO对C2H4(O2/CO2)扩散火焰中碳烟生成的影响

高永磐; 程汉翀; 汪洋; 刘小芳

doi:10.3969/j.issn.1671-7872.2021.02.007

掺杂H₂/CO对C₂H₄(O₂/CO₂)扩散火焰中碳烟生成的影响

安徽工业大学能源与环境学院, 安徽马鞍山 243002

基金项目:

国家自然科学基金项目（51776001）

详细信息

作者简介:
高永磐(1995—)，男，河南新密人，硕士生，主要研究方向为碳氢燃料燃烧污染物排放与控制。

中图分类号: TK16
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出版历程
- 收稿日期: 2020-09-29
- 网络出版日期: 2022-09-25
- 发布日期: 2021-04-29

Effect of H₂/CO Doping on Soot Formation in C₂H₄(O₂/CO₂) Diffusion Flame

School of Energy and Environment, Anhui University of Technology, Maanshan 243002, China

摘要

摘要: 通过消光法实验和CoFlame程序模拟研究O₂/CO₂气氛下，掺杂H₂/CO对层流乙烯扩散火焰中碳烟生成的影响，获得火焰高度、温度、碳烟及重要组分含量的分布，分析主要碳烟演化过程的变化规律。结果表明：掺杂H₂/CO对乙烯火焰中的碳烟生成有明显抑制作用，当H₂与CO的流量比为0.3∶0.3时，抑制作用最强，碳烟体积分数降低25.3%；掺杂H₂/CO对乙烯火焰的高度、温度影响微弱，热效应、氧化速率不是影响乙烯火焰中碳烟生成的主要因素，主要是通过抑制乙炔、苯、芘的生成抑制碳烟成核和碳烟表面增长，最终减少碳烟的生成。
- 掺杂H₂/CO /
- 消光法 /
- O₂/CO₂气氛 /
- 扩散火焰 /
- 碳烟
Abstract: The influence of H₂/CO doping on soot formation in laminar ethylene diffusion flame in O₂/CO₂ atmosphere was studied by extinction experiment and CoFlame program simulation.The distributions of flame height, temperature, content of soot and important components were obtained, and the variation of main soot evolution process was analyzed. The results show that the addition of H₂/CO has obvious inhibition effect on soot formation in ethylene flame. When the flow ratio of H₂ to CO is 0.3∶0.3, the inhibition effect is the strongest, and the soot volume fraction decreases by 25.3%. The effect of H₂/CO doping on the height and temperature of ethylene flame is weak, the thermal effect and oxidation rate are not the main factors affecting soot formation in ethylene flame. It is mainly through inhibiting the formation of acetylene, benzene and pyrene, then inhibiting the soot nucleation and soot surface growth, and finally reducing the soot formation.
- doping H₂/CO /
- light extinction method /
- O₂/CO₂ atmosphere /
- diffusion flame /
- soot

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