当前位置: X-MOL 学术Combust. Flame › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effects of ammonia addition on soot formation in ethylene laminar premixed flames
Combustion and Flame ( IF 4.4 ) Pub Date : 2021-08-30 , DOI: 10.1016/j.combustflame.2021.111698
Can Shao 1 , Felipe Campuzano 1, 2 , Yitong Zhai 1 , Haoyi Wang 1 , Wen Zhang 3 , S. Mani Sarathy 1
Affiliation  

This paper presents particle size distributions and chemical compositions of soot measured using a Scanning Mobility Particle Sizer (SMPS) and a Fourier-Transform Ion Cyclotron Resonance Mass Spectrometer (FT-ICR-MS), respectively, in flames of ethylene-oxygen and ethylene-oxygen doped with ammonia. The inhibitory effect of ammonia addition on soot formation in ethylene flames, as well as the influence on soot particle size are discussed. The results of particle size distributions showed that doping with ammonia decreases soot particle size and the volume fraction of soot particles. In this work, the flames were carefully studied under similar temperature conditions, so all observed changes could be attributed to chemical effects. The results of FTICR-MS analysis showed that polycyclic aromatic hydrocarbons (PAHs) were the main compositions in both pure ethylene and ammonia doped ethylene flames. Nitrogen-containing PAHs (N-PAHs) did not contribute significantly to soot nucleation or mass growth processes. Chemical kinetic analysis revealed that Csingle bondN species generated in ethylene-ammonia flames removed carbon from participating in soot precursor formation, thereby reducing soot formation.



中文翻译:

添加氨对乙烯层流预混火焰烟尘形成的影响

本文介绍了分别使用扫描迁移率粒度仪 (SMPS) 和傅立叶变换离子回旋共振质谱仪 (FT-ICR-MS) 在乙烯-氧气和乙烯-掺有氨的氧气。讨论了氨添加对乙烯火焰中烟尘形成的抑制作用,以及对烟尘粒径的影响。粒度分布的结果表明,氨的掺杂降低了烟灰颗粒尺寸和烟灰颗粒的体积分数。在这项工作中,在相似的温度条件下仔细研究了火焰,因此所有观察到的变化都可以归因于化学作用。FTICR-MS 分析结果表明,多环芳烃 (PAHs) 是纯乙烯和掺氨乙烯火焰中的主要成分。含氮多环芳烃 (N-PAHs) 对烟尘成核或大量生长过程没有显着贡献。化学动力学分析表明,C单键在乙烯-氨火焰中产生的 N 物质去除了参与烟灰前体形成的碳,从而减少了烟灰的形成。

更新日期:2021-08-31
down
wechat
bug