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Research on Combustion and Emission Characteristics of Ammonia under Preheating Conditions
Li, Jun1; Huang, Hongyu2; Kobayashi, Noriyuki1; He, Zhaohong2; Osaka, Yugo3; Zeng, Tao1
2016-07-01
发表期刊JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
卷号49期号:7页码:641-648
摘要The present study focuses on determining the potential applicability of ammonia (NH3) as a carbon-free alternative fuel through numerical simulations. The combustion and emissions characteristics of premixed NH3-air flame at preheating conditions were numerically investigated. The burning velocity and all species mole fraction were determined using the Miller and Bowman and the Reductive Konnov mechanism. The results show that both the equivalence ratio and preheating temperature have important effects on the laminar burning velocity and adiabatic flame temperature of NH3. The reaction rate of production and mole fraction of H, O, and OH radicals, together with nitrogen radicals such as NH2, NH, and N in the reaction zone, increases as the preheating temperature is increased from 298 to 573 K. Although NO concentrations in the exhaust gas increased with increasing preheating temperature under fuel-lean conditions, they could be maintained at a reasonably low level at all preheating temperatures, mainly due to the increased reduction reaction of NO with NH2, NH, N radicals. The main N radical formation in the NH3-air combustion originates from NH3 rather than N-2, which indicates that the N-2 dilution effect of NH3-air flame is negligible for NO formation. Furthermore, the equivalence ratio has a dominant effect on NO yields, because of the higher reduction reaction and lower flame temperature at higher equivalence ratio conditions, leading to a lower formation of HNO, which indicates a potential in reducing NO emissions in NH3 combustion. Therefore, the preheating temperature and equivalence ratio should be given sufficient consideration in practical operations to minimize NO formation in combustion of NH3 as a clean fuel.
文章类型Article
关键词Ammonia Preheating Combustion Burning Velocity Nitric Oxide Formation
WOS标题词Science & Technology ; Technology
资助者China Scholarship Council ; China Scholarship Council
DOI10.1252/jcej.15we075
研究领域[WOS]Engineering
关键词[WOS]LAMINAR BURNING VELOCITY ; HYDROGEN-PRODUCTION ; NITROUS OXIDE ; LOW-PRESSURE ; MIXTURES ; METHANE ; FLAMES ; OXYGEN ; AIR ; ENGINES
收录类别SCI
语种英语
资助者China Scholarship Council ; China Scholarship Council
WOS类目Engineering, Chemical
WOS记录号WOS:000381386800011
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/11841
专题中国科学院广州能源研究所
作者单位1.Nagoya Univ, Dept Chem Engn, Nagoya, Aichi 4648603, Japan
2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
3.Kanazawa Univ, Coll Sci & Engn, Kanazawa, Ishikawa 9201192, Japan
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GB/T 7714
Li, Jun,Huang, Hongyu,Kobayashi, Noriyuki,et al. Research on Combustion and Emission Characteristics of Ammonia under Preheating Conditions[J]. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN,2016,49(7):641-648.
APA Li, Jun,Huang, Hongyu,Kobayashi, Noriyuki,He, Zhaohong,Osaka, Yugo,&Zeng, Tao.(2016).Research on Combustion and Emission Characteristics of Ammonia under Preheating Conditions.JOURNAL OF CHEMICAL ENGINEERING OF JAPAN,49(7),641-648.
MLA Li, Jun,et al."Research on Combustion and Emission Characteristics of Ammonia under Preheating Conditions".JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 49.7(2016):641-648.
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