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Characterization of char from high temperature fluidized bed coal pyrolysis in complex atmospheres
Zhong, Mei1,2; Gao, Shiqiu3; Zhou, Qi3; Yue, Junrong3; Ma, Fengyun1,2; Xu, Guangwen3
Source PublicationPARTICUOLOGY

The physiochemical properties of chars produced by coal pyrolysis in a laboratory-scale fluidized bed reactor with a continuous coal feed and char discharge at temperatures of 750 to 980 degrees C under N-2-based atmospheres containing O-2, H-2, CO, CH4, and CO2 were studied. The specific surface area of the char was found to decrease with increasing pyrolysis temperature. The interlayer spacing of the char also decreased, while the average stacking height and carbon crystal size increased at higher temperatures, suggesting that the char generated at high temperatures had a highly ordered structure. The char obtained using an ER value of 0.064 exhibited the highest specific surface area and oxidation reactivity. Relatively high O-2 concentrations degraded the pore structure of the char, decreasing the surface area. The char produced in an atmosphere incorporating H-2 showed a more condensed crystalline structure and consequently had lower oxidation reactivity. (C) 2015 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.orgilicenses/by-nc-nd/4.0/).

KeywordPyrolysis Coal Char Oxidation Reactivity Active Sites Crystal Structure
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS KeywordGasification Reactivity ; Steam Gasification ; Biomass Chars ; Heating Rate ; Combustion ; Spectroscopy ; Evolution ; Gas
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Chemical ; Materials Science, Multidisciplinary
Funding OrganizationNational Basic Research Program of China(2011CB201304) ; Scientific Research Program of the Higher Education Institution of Xinjiang(XJEDU2014I003) ; Scientific Research Starting Foundation for Doctor Graduate, Xinjiang University(BS120111) ; Scientific Research Open Project of Key Laboratory of Oil & Gas Fine Chemicals, Ministry of Education & Xinjiang Uyghur Autonomous Region, Xinjiang University(XJDX0908-2012-6)
WOS IDWOS:000371837100007
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Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorMa, Fengyun
Affiliation1.Xinjiang Univ, Coll Chem & Chem Engn, Minist Key Lab Oil & Gas Fine Chem, Urumqi 830046, Peoples R China
2.Xinjiang Univ, Coll Chem & Chem Engn, Key Lab Coal Clean Convers & Chem Engn Proc, Urumqi 830046, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zhong, Mei,Gao, Shiqiu,Zhou, Qi,et al. Characterization of char from high temperature fluidized bed coal pyrolysis in complex atmospheres[J]. PARTICUOLOGY,2016,25(APR):59-67.
APA Zhong, Mei,Gao, Shiqiu,Zhou, Qi,Yue, Junrong,Ma, Fengyun,&Xu, Guangwen.(2016).Characterization of char from high temperature fluidized bed coal pyrolysis in complex atmospheres.PARTICUOLOGY,25(APR),59-67.
MLA Zhong, Mei,et al."Characterization of char from high temperature fluidized bed coal pyrolysis in complex atmospheres".PARTICUOLOGY 25.APR(2016):59-67.
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