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Destruction of caking properties of bituminous coal by jetting pre-oxidation in a fluidized bed
Alternative TitleFuel
Zhao, Zhigang1,2; Zhang, Juwei1; Zhao, Feixiang1; Zeng, Xi1; Liu, Xiaoxing1; Xu, Guangwen1
2014-10-01
Source PublicationFUEL
ISSN0016-2361
Volume133Issue:1Pages:45-51
AbstractJetting pre-oxidation was proposed to destroy the caking property of bituminous coal in a fluidized bed (FB) gasifier. By defining an index omega to characterize the degree or realized effect of caking destruction, experiments were conducted in an electrically heated laboratory FB reactor under different conditions to investigate the feasibility and required conditions for effectively destroying the caking propensity of a kind of bituminous coal. The tested major parameters were the equivalence air ratio (ER) of jetting gas and the temperature in the jetting zone. At relatively lower temperatures it was hard to completely destroy the caking propensity of the tested coal particles. Without oxygen inside the jetting gas, it was also impossible to fully destroy the caking propensity of the coal even at sufficiently high temperatures. Thus, oxidation of coal particles at suitably high temperatures was essential to the expected good destruction of their caking propensity. For the tested bituminous coal this was achieved at temperatures above 1000 degrees C in the jetting zone and an equivalent oxygen ratio above 0.1 for the jetting gas (up to 0.3 considering gasification applications). For coal pre-oxidation in a FB, the agglomeration state of char particles due to caking adherence in the reactor could be anticipated via the unsteady variations in the bed temperature and H-2/CO concentrations in the effluent gas with reaction time. (C) 2014 Elsevier Ltd. All rights reserved.; Jetting pre-oxidation was proposed to destroy the caking property of bituminous coal in a fluidized bed (FB) gasifier. By defining an index omega to characterize the degree or realized effect of caking destruction, experiments were conducted in an electrically heated laboratory FB reactor under different conditions to investigate the feasibility and required conditions for effectively destroying the caking propensity of a kind of bituminous coal. The tested major parameters were the equivalence air ratio (ER) of jetting gas and the temperature in the jetting zone. At relatively lower temperatures it was hard to completely destroy the caking propensity of the tested coal particles. Without oxygen inside the jetting gas, it was also impossible to fully destroy the caking propensity of the coal even at sufficiently high temperatures. Thus, oxidation of coal particles at suitably high temperatures was essential to the expected good destruction of their caking propensity. For the tested bituminous coal this was achieved at temperatures above 1000 degrees C in the jetting zone and an equivalent oxygen ratio above 0.1 for the jetting gas (up to 0.3 considering gasification applications). For coal pre-oxidation in a FB, the agglomeration state of char particles due to caking adherence in the reactor could be anticipated via the unsteady variations in the bed temperature and H-2/CO concentrations in the effluent gas with reaction time. (C) 2014 Elsevier Ltd. All rights reserved.
KeywordCaking Propensity Caking Destruction Fluidized Bed Gasification Coal Jetting Pre-oxidation
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.fuel.2014.05.006
URL查看原文
Indexed BySCI
Language英语
WOS KeywordFIXED-BED ; GASIFIER
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
WOS IDWOS:000338738900006
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/11053
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Anhui Univ Technol, Anhui Key Lab Coal Clean Convers & Utilizat, Sch Chem & Chem Engn, Maanshan 243002, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Zhigang,Zhang, Juwei,Zhao, Feixiang,et al. Destruction of caking properties of bituminous coal by jetting pre-oxidation in a fluidized bed[J]. FUEL,2014,133(1):45-51.
APA Zhao, Zhigang,Zhang, Juwei,Zhao, Feixiang,Zeng, Xi,Liu, Xiaoxing,&Xu, Guangwen.(2014).Destruction of caking properties of bituminous coal by jetting pre-oxidation in a fluidized bed.FUEL,133(1),45-51.
MLA Zhao, Zhigang,et al."Destruction of caking properties of bituminous coal by jetting pre-oxidation in a fluidized bed".FUEL 133.1(2014):45-51.
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