Numerical Analysis on the Characteristics of Soot Particles in C2H4/CO2/O2/N2 Combustion

doi:10.1016/S1004-9541(13)60485-3

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (3): 238-245.DOI: 10.1016/S1004-9541(13)60485-3

• 催化、动力学与反应工程 • 上一篇下一篇

Numerical Analysis on the Characteristics of Soot Particles in C₂H₄/CO₂/O₂/N₂ Combustion

李山岭, 蒋勇, 陈文婷

University of Science and Technology of China, State Key laboratory of Fire Science, Hefei 230026, China

收稿日期:2011-04-08 修回日期:2012-05-12 出版日期:2013-03-28 发布日期:2013-04-01
通讯作者: JIANG Yong
基金资助:
Supported by the National Natural Science Foundation of China (51176181), the National Basic Research of China (2012CB719704), and the National Key Technology Research and Development Program of China (2011BAK07B01).

Numerical Analysis on the Characteristics of Soot Particles in C₂H₄/CO₂/O₂/N₂ Combustion

LI Shanling, JIANG Yong, CHEN Wenting

University of Science and Technology of China, State Key laboratory of Fire Science, Hefei 230026, China

Received:2011-04-08 Revised:2012-05-12 Online:2013-03-28 Published:2013-04-01
Supported by:
Supported by the National Natural Science Foundation of China (51176181), the National Basic Research of China (2012CB719704), and the National Key Technology Research and Development Program of China (2011BAK07B01).

摘要/Abstract

摘要： The purpose of this study is to investigate the characteristics of soot particles in C₂H₄/CO₂/O₂/N₂ combustion at equivalence ratio of 3.0-5.0. As the oxidant is switched from conventional air to CO₂/O₂/N₂ mixture, the key species C₂H₂, C₃H₃ responsible for formation of first aromatic ring, the typical aromatics and 4-ring aromatics total production rate all decrease greatly. In addition, with CO₂ mole fraction from 0.2 to 0.5 in the mixture, the soot particle number density, volume fraction, surface area density, which are three most important parameters to soot particle property, are suppressed obviously. Furthermore, the increasing content of CO₂ in the oxidizer influences mostly H, OH radical concentrations by two reactions: CO+OH=CO₂ H and H+O₂=O+OH, and the production rate of H, OH from the two reactions declined, which revealed that CO₂ in mixture has an inhibiting effect on soot particle generation.

关键词: O₂/CO₂ combustion, soot particle, polycyclic aromatic hydrocarbon, production rate

Abstract: The purpose of this study is to investigate the characteristics of soot particles in C₂H₄/CO₂/O₂/N₂ combustion at equivalence ratio of 3.0-5.0. As the oxidant is switched from conventional air to CO₂/O₂/N₂ mixture, the key species C₂H₂, C₃H₃ responsible for formation of first aromatic ring, the typical aromatics and 4-ring aromatics total production rate all decrease greatly. In addition, with CO₂ mole fraction from 0.2 to 0.5 in the mixture, the soot particle number density, volume fraction, surface area density, which are three most important parameters to soot particle property, are suppressed obviously. Furthermore, the increasing content of CO₂ in the oxidizer influences mostly H, OH radical concentrations by two reactions: CO+OH=CO₂ H and H+O₂=O+OH, and the production rate of H, OH from the two reactions declined, which revealed that CO₂ in mixture has an inhibiting effect on soot particle generation.

Key words: O₂/CO₂ combustion, soot particle, polycyclic aromatic hydrocarbon, production rate

李山岭, 蒋勇, 陈文婷. Numerical Analysis on the Characteristics of Soot Particles in C₂H₄/CO₂/O₂/N₂ Combustion[J]. Chinese Journal of Chemical Engineering, 2013, 21(3): 238-245.

LI Shanling, JIANG Yong, CHEN Wenting . Numerical Analysis on the Characteristics of Soot Particles in C₂H₄/CO₂/O₂/N₂ Combustion[J]. Chin.J.Chem.Eng., 2013, 21(3): 238-245.

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Numerical Analysis on the Characteristics of Soot Particles in C₂H₄/CO₂/O₂/N₂ Combustion

Numerical Analysis on the Characteristics of Soot Particles in C₂H₄/CO₂/O₂/N₂ Combustion

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