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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
Source PublicationJOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Volume49Issue:7Pages:641-648
AbstractThe 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.
SubtypeArticle
KeywordAmmonia Preheating Combustion Burning Velocity Nitric Oxide Formation
WOS HeadingsScience & Technology ; Technology
DOI10.1252/jcej.15we075
WOS Subject ExtendedEngineering
WOS KeywordLAMINAR BURNING VELOCITY ; HYDROGEN-PRODUCTION ; NITROUS OXIDE ; LOW-PRESSURE ; MIXTURES ; METHANE ; FLAMES ; OXYGEN ; AIR ; ENGINES
Indexed BySCI
Language英语
Funding OrganizationChina Scholarship Council
WOS SubjectEngineering, Chemical
WOS IDWOS:000381386800011
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/11841
Collection中国科学院广州能源研究所
Affiliation1.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
Recommended Citation
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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