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Vol. 25 No. 15 (2013): Vol 25 Issue 15

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Chemical Effects of CO2 Concentration on Flame Structure and Soot Precursors in Rich Ethylene Oxidation

https://doi.org/10.14233/ajchem.2013.15777
Yindi Zhang
Yangtze University Research for China National Petroleum Corporation Key Laboratory of Oil Gas Production, Wuhan 430100, Hubei Province, P.R. China ; State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, Hubei Province, P.R. China
Chun Lou
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, Hubei Province, P.R. China
Yong Li
Gas Lift Technology Center of Tuha Oilfield of China National Petroleum Corporation, Hami 838202, Xinjiang Province, P.R. China

Corresponding Author(s) : Yindi Zhang

yindi.zhanghust@gmail.com

Asian Journal of Chemistry, Vol. 25 No. 15 (2013): Vol 25 Issue 15

Abstract

Flame structure and soot precursors were investigated numerically with CO2 addition in fuel enrichment laminar premixed C2H4/O2/Ar flames (C/O ratio of F = 2.5) at low pressure (0.05 atm). An updated mechanism emphasizes the effect of presence of an O2/CO2 atmosphere instead of an O2/Ar one in premixed flame. The addition of CO2 in the fresh gas inlet causes a shift downstream of the flame front and thus flame inhibition. The partial replacement of Ar by CO2 leads to an increase of burnt gas quantities of H2O, CO and CO2 and leads to a decrease of the maximum mole fractions of some C2 to C10 hydrocarbon intermediates (C2H2, C3H3, C6H6, C6H6O, C8H8 and C10H8). The sensitivity analysis and reaction-path analysis show that C2H4 reaction path and products are altered due to the CO2 addition.

Keywords

Fuel enrichment Carbon dioxide Kinetics modeling Flame structure Soot precursors
Zhang, Y., Lou, C., & Li, Y. (2013). Chemical Effects of CO2 Concentration on Flame Structure and Soot Precursors in Rich Ethylene Oxidation. Asian Journal of Chemistry, 25(15), 8810–8816. https://doi.org/10.14233/ajchem.2013.15777
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