The oxygen-deficient combustion and its effect on the NOx emission in a localized stratified vortex-tube combustor

doi:10.1016/j.energy.2021.121365

GIEC OpenIR

	The oxygen-deficient combustion and its effect on the NOx emission in a localized stratified vortex-tube combustor
	Ren, Shoujun 1,2,3,4; Yang, Haolin1,3,4 ; Wang, Xiaohan1,3,4
	2021-11-15
发表期刊	ENERGY
ISSN	0360-5442
卷号	235 页码:12
通讯作者	Ren, Shoujun(rensj@ms.giec.ac.cn)
摘要	The oxygen-deficient combustion characteristics of methane in a localized stratified vortex-tube combustor (LSVC) are studied by diluting combustion air with nitrogen. The influences of oxygen mole fraction (0.13-0.21) on flame configuration, combustion stability, combustion efficiency, and NOx emission characteristics are experimental investigated at the inlet temperature of 300 K. Combined with the numerical simulation method, the NOx generation, and emission mechanisms are analyzed in this combustor. Results show that the LSVC can achieve a wide stability limit, in which the global equivalence ratio can be as low as 0.22 at the lowest oxygen mole fraction (beta) of 0.13. To ensure high combustion efficiency, the beta should be kept above 0.16 since the oxygen-deficient condition reduces the reaction rate and flame temperature. The combustor can achieve ultra-low NOx emission of below 10 ppm (@ 15 vol% O-2) due to low oxygen concentration and flame temperature. Furthermore, part of NOx entrained into the fuel-rich reduction zone by the swirl flow field is reduced by the reductive species (i.e., CO and H-2) to further lowering NOx emissions. The results of this paper can guide the development of the LSVC in the high-efficiency and low-emission combustion fields. (C) 2021 Elsevier Ltd. All rights reserved.
关键词	Oxygen-deficient combustion Vortex-tube combustor Ultra-lean combustion NOx emission Combustion efficiency
DOI	10.1016/j.energy.2021.121365
关键词[WOS]	METHANE/OXYGEN COMBUSTION ; GAS ; SYSTEMS ; BOILER
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Plan of China[2016YFE0127500]
WOS研究方向	Thermodynamics ; Energy & Fuels
项目资助者	National Key Research and Development Plan of China
WOS类目	Thermodynamics ; Energy & Fuels
WOS记录号	WOS:000703183000001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/34778
专题	中国科学院广州能源研究所
通讯作者	Ren, Shoujun
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Jiangsu Prov Key Lab Aerosp Power Syst, Nanjing 210016, Peoples R China 3.Chinese Acad Sci, Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 4.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Ren, Shoujun,Yang, Haolin,Wang, Xiaohan. The oxygen-deficient combustion and its effect on the NOx emission in a localized stratified vortex-tube combustor[J]. ENERGY,2021,235:12.
APA	Ren, Shoujun,Yang, Haolin,&Wang, Xiaohan.(2021).The oxygen-deficient combustion and its effect on the NOx emission in a localized stratified vortex-tube combustor.ENERGY,235,12.
MLA	Ren, Shoujun,et al."The oxygen-deficient combustion and its effect on the NOx emission in a localized stratified vortex-tube combustor".ENERGY 235(2021):12.