NO Emission Characteristics of Pulverized Coal Combustion in O2/N2 and O2/H2O Atmospheres in a Drop-Tube Furnace

doi:10.3390/ma17204997

	NO Emission Characteristics of Pulverized Coal Combustion in O2/N2 and O2/H2O Atmospheres in a Drop-Tube Furnace
	Zhang, Liang 1; Fan, Jun 1; Wang, Changlin 1; Yuan, Jiaqi 1; Hao, Cen 1; Cao, Shiying 2
	2024-10
发表期刊	MATERIALS
卷号	17 期号:20
摘要	Oxy-steam combustion is a new oxy-fuel combustion technology. This paper focuses on the NO emission characteristics during the combustion of SF (Shen Fu) coal in O-2/N(2 )and O-2/H2O mixtures. Experiments were performed in a drop-tube furnace. Combustion tests were carried out in O-2/N-2 and O-2/H2O atmospheres for various O(2 )concentrations (21%, 30%, 40%, and 60%) at different temperatures (1173 K, 1273 K, and 1373 K). In addition, combustion experiments at different excess oxygen ratios (lambda) were conducted in O-2/N-2 and O-2/H2O atmospheres. The influences of the atmosphere, oxygen concentration, temperature, and excess oxygen ratio on NO emissions were analyzed. The results show that the NO concentrations of SF coal combustion in the 21% O2/79% H2O atmosphere were much lower than those in the 21% O2/79% N2 atmosphere at the three temperatures considered. This was because a large amount of NO was decomposed during the SF coal combustion in the O-2/H2O atmospheres. The reasons for the decomposition of NO include the selective non-catalytic reaction (SNCR) mechanism and char's important role as a catalyst for the destruction of NO, either directly or by reacting with CO or H-2. In oxy-steam combustion, the NO concentrations significantly increased with the increase in the oxygen concentration from 21 vol.% to 60 vol.% and the temperature from 1173 K to 1373 K. The excess oxygen ratio (lambda) slightly impacted the NO emissions in the O-2/H2O atmosphere.
关键词	pulverized coal O-2/H2O atmosphere drop-tube furnace NO emissions
其他关键词	OXY-FUEL COMBUSTION ; STEAM COMBUSTION ; FLUIDIZED-BED ; GASIFICATION ; NH3 ; PYROLYSIS ; MECHANISM ; IGNITION ; BIOMASS ; CHAR
DOI	10.3390/ma17204997
收录类别	SCIE
语种	英语
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:001342589800001
出版者	MDPI
原始文献类型	Article
EISSN	1996-1944
引用统计	被引频次[WOS]：0 [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.library.ouchn.edu.cn/handle/39V7QQFX/172538
专题	国家开放大学江苏分部
通讯作者	Cao, Shiying
作者单位	1.Jiangsu Open Univ, Sch Informat Engn, Nanjing 210036, Peoples R China; 2.Shenzhen Polytech Univ, Sch Mech & Elect Engn, Shenzhen 518055, Peoples R China
第一作者单位	国家开放大学江苏分部
第一作者的第一单位	国家开放大学江苏分部
推荐引用方式 GB/T 7714	Zhang, Liang,Fan, Jun,Wang, Changlin,et al. NO Emission Characteristics of Pulverized Coal Combustion in O2/N2 and O2/H2O Atmospheres in a Drop-Tube Furnace[J]. MATERIALS,2024,17(20).
APA	Zhang, Liang,Fan, Jun,Wang, Changlin,Yuan, Jiaqi,Hao, Cen,&Cao, Shiying.(2024).NO Emission Characteristics of Pulverized Coal Combustion in O2/N2 and O2/H2O Atmospheres in a Drop-Tube Furnace.MATERIALS,17(20).
MLA	Zhang, Liang,et al."NO Emission Characteristics of Pulverized Coal Combustion in O2/N2 and O2/H2O Atmospheres in a Drop-Tube Furnace".MATERIALS 17.20(2024).