Study on stretch extinction characteristics of methane/carbon dioxide versus oxygen/carbon dioxide counterflow non-premixed combustion under elevated pressures

doi:10.1016/j.jngse.2021.103994

	Study on stretch extinction characteristics of methane/carbon dioxide versus oxygen/carbon dioxide counterflow non-premixed combustion under elevated pressures
	Zhang, Xiaochun 1; Zhang, Zijian 1; Li, Xing 2,3,4; Chen, Yufang 1,2,3,4; Wang, Xiaohan 2,3,4
刊名	JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
	2021-08-01
卷号	92 页码:11
关键词	Methane utilization Counterflow combustion Elevated pressure Carbon dioxide diluted Oxygen-enriched flame Stretch extinction limit
ISSN号	1875-5100
DOI	10.1016/j.jngse.2021.103994
通讯作者	Li, Xing(lixing@ms.giec.ac.cn)
英文摘要	As a clean gaseous fuel, methane (the main constituent of natural gas) has been widely used in the lives of residents and industrial processes. The oxy-fuel combustion technology for methane/carbon dioxide is an effective way to reduce the pollutant emissions of NOx, which is also beneficial to the capture of carbon dioxide. Herein, the stretch extinction characteristics of non-premixed flames induced by methane/carbon dioxide mixtures versus oxygen/carbon dioxide mixtures counterflow combustion with various fuel concentrations were studied in high-pressure environments. The computed flame extinction strain rates of oxygen-enriched and air combustions in low fuel concentration range at pressures of 0.1, 0.5 and 0.7 MPa have a good consistency with the experiment results obtained from previous literature. The results show that the increase of flame extinction limit represented by the stretch rate for the oxygen-enriched combustion with increasing pressure is more significant than that for the air combustion. The analyses of reaction pathways, integral of reaction rates and sensitivity coefficients suggest that the OH formation rates of near extinction flames limits can be used to estimate the ratio of the flame extinction strain rate for oxygen-enriched combustion to that for air combustion under high pressures. The reasons for the enhancement of the OH formation rate aroused by increasing pressures were clarified.
资助项目	National Natural Science Foundation of China[51506204]
WOS关键词	OXY-FUEL COMBUSTION ; FLAME EXTINCTION ; DIFFUSION FLAMES ; BURNING VELOCITY ; COAL COMBUSTION ; CARBON-DIOXIDE ; CO2 ; MIXTURES ; AIR ; TEMPERATURE
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000659183800002
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/33313]
专题	中国科学院广州能源研究所
通讯作者	Li, Xing
作者单位	1.Guangdong Univ Technol, Sch Environm Sci & Engn, Guangzhou 510006, Peoples R China 2.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 3.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Energy Convers, 2 Nengyuan Rd, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xiaochun,Zhang, Zijian,Li, Xing,et al. Study on stretch extinction characteristics of methane/carbon dioxide versus oxygen/carbon dioxide counterflow non-premixed combustion under elevated pressures[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2021,92:11.
APA	Zhang, Xiaochun,Zhang, Zijian,Li, Xing,Chen, Yufang,&Wang, Xiaohan.(2021).Study on stretch extinction characteristics of methane/carbon dioxide versus oxygen/carbon dioxide counterflow non-premixed combustion under elevated pressures.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,92,11.
MLA	Zhang, Xiaochun,et al."Study on stretch extinction characteristics of methane/carbon dioxide versus oxygen/carbon dioxide counterflow non-premixed combustion under elevated pressures".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 92(2021):11.