Chemical kinetic study on coal volatiles combustion for various oxygen concentrations

被引：0
|
作者：
Chen C. [1 ]
Yang Q. [1 ]
Chen Y. [2 ]
Zhang R. [1 ]
Liu D. [1 ]
机构：
[1] School of Energy and Power Engineering, Nanjing University of Science and Technology, Jiangsu, Nanjing
[2] Zhejiang Zheneng Electric Power Limited Company, Zhejiang, Hangzhou
来源：
Huagong Xuebao/CIESC Journal | 2022年 / 73卷 / 09期
关键词：
chemical analysis; counterflow diffusion flames; organic hydrocarbon pollutants; oxygen concentration; pyrolysis; reaction kinetics;
D O I：
10.11949/0438-1157.20220619
中图分类号：
学科分类号：
摘要：
Coal-burning organic pollutants have serious harm to human health and ecological environment, and O2 has a significant regulatory effect on the formation of organic products in flames. In view of the fact that coal volatiles combustion is a crucial part of coal combustion, the effect of O2 concentration on hydrocarbon formation characteristics and mechanisms in counterflow diffusion flame was studied by numerical simulation using coal pyrolysis gas as fuel. The results showed that the increase of O2 concentration promoted the formation of O and OH, which in turn increased H concentration, highlighting the importance of reactions involving H and OH. In addition, concentrations of acetylene (C2H2), propyne (PC3H4), propargyl (C3H3), vinylacetylene (C4H4), benzene (C6H6) and naphthalene (C10H8) all increased. Increasing O2 concentration promoted the conversion from C2H2 to PC3H4, and made C3H3 more inclined to convert to butadiene (C4H6), while fulvene was more inclined to generate C6H6 through phenyl (C6H5). Therefore, the status of C6H5 as a precursor of C6H6 was strengthened. © 2022 Chemical Industry Press. All rights reserved.
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页码：4133 / 4146
页数：13
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