Effects of Gas Staging on the NO Emission during O-2/CO2 Combustion with High Oxygen Concentration in Circulating Fluidized Bed

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	Effects of Gas Staging on the NO Emission during O-2/CO2 Combustion with High Oxygen Concentration in Circulating Fluidized Bed
	Xu Mingxin 1,2; Li Shiyuan 1; Li Wei 1,2; Lu Qinggang 1
刊名	ENERGY & FUELS
	2015-05-01
卷号	29 期号:5 页码:3302-3311
英文摘要	Oxy-fuel circulating fluidized bed (oxy-CFB) combustion, which combines the advantages of oxy-fuel combustion with those of CFB technology, is one of the most promising technologies to capture CO2. In this paper, experiments were carried out in a 50 kW(th) CFB combustor to investigate the effects of gas staging on the formation and emission of NO in the oxy-fuel CFB combustor with high oxygen concentrations by analyzing the NO axial profiles along the combustor height at different conditions. The results show that the concentration of NO in the dense zone in oxy-fuel firing with high oxygen concentrations is slightly higher than that in air-firing, but the final emission of NO is lower in oxy-fuel combustion. With the secondary gas location rising, the emission of NO maximally drops from 171.2 mg/MJ to 31.9 mg/MJ in 50% O-2/50% CO2 atmosphere. Gas staging is also an efficient method to reduce NO emission in oxy-fuel CFB combustion with a high oxygen concentration. The decrease of the primary/secondary gas ratio leads the dropping of NO emission maximally from 171.2 mg/MJ to 66.7 mg/MJ. However, the effects of gas staging lessen in oxy-fuel CFB combustion with a high oxygen concentration compared with that in traditional air combustion. In addition, oxygen staging could be more effective in restricting the formation of NO in the dense zone than gas staging in oxy-fuel CFB combustion with high oxygen concentration.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Energy & Fuels ; Engineering, Chemical
研究领域[WOS]	Energy & Fuels ; Engineering
关键词[WOS]	FUEL COAL COMBUSTION ; FLUE-GAS ; TECHNOLOGY DEVELOPMENT ; POLLUTANT EMISSIONS ; CARBON-MONOXIDE ; NITROGEN-OXIDES ; CO2 CAPTURE ; TEMPERATURE ; REDUCTION ; RECYCLE
收录类别	SCI
语种	英语
WOS记录号	WOS:000355158200064
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/98912]
专题	工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位	1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Xu Mingxin,Li Shiyuan,Li Wei,et al. Effects of Gas Staging on the NO Emission during O-2/CO2 Combustion with High Oxygen Concentration in Circulating Fluidized Bed[J]. ENERGY & FUELS,2015,29(5):3302-3311.
APA	Xu Mingxin,Li Shiyuan,Li Wei,&Lu Qinggang.(2015).Effects of Gas Staging on the NO Emission during O-2/CO2 Combustion with High Oxygen Concentration in Circulating Fluidized Bed.ENERGY & FUELS,29(5),3302-3311.
MLA	Xu Mingxin,et al."Effects of Gas Staging on the NO Emission during O-2/CO2 Combustion with High Oxygen Concentration in Circulating Fluidized Bed".ENERGY & FUELS 29.5(2015):3302-3311.