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Isothermal differential characteristics of gas-solid reaction in micro-fluidized bed reactor
Yu, Jian; Zeng, Xi; Zhang, Juwei; Zhong, Mei; Zhang, Guangyi; Wang, Yin; Xu, Guangwen
2013
Source PublicationFUEL
Volume103Issue:0Pages:29-36
AbstractThe isothermal differential characteristics of the gas-solid reaction occurring in a micro-fluidized bed reactor were studied using the indigenously developed Micro-Fluidized Bed Reaction Analyzer (MFBRA). The combustion of graphite powder in micrometers was taken as the model reaction because of its negligible internal diffusion and chemical-reaction simplicity. With minimized inhibitions from both the internal and external diffusions, the reaction in MFBRA at a preset temperature was analyzed by using the isothermal kinetic approach, resulting in an activation energy of 165 kJ/mol and a pre-exponential factor of 10(6) 1/s. The reaction was further found to be subject to the nucleation and growth model expressed by G(alpha) = -ln(1 - alpha). Measuring this reaction in TG via the programmed heating method resulted in the similar activation energy and the same reaction function model (by extrapolating to zero conversion). Comparing with the non-isothermal approach for TG that involves complicated mathematical calculations, the isothermal differential approach for MFBRA allowed the separation of the temperature effect (i.e., the reaction rate constant) and kinetic function model, thus providing a simple and reliable determination of the gas-solid reaction kinetics. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
KeywordMicro-fluidized Bed Gas-solid Reaction Isothermal Differential Characteristics Reaction Kinetics Graphite Combustion
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
Language英语
WOS KeywordNATURAL GRAPHITE ; THERMAL-ANALYSIS ; KINETICS ; OXIDATION ; MECHANISMS
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
WOS IDWOS:000311932200006
Citation statistics
Cited Times:57[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13386
Collection研究所(批量导入)
AffiliationChinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Yu, Jian,Zeng, Xi,Zhang, Juwei,et al. Isothermal differential characteristics of gas-solid reaction in micro-fluidized bed reactor[J]. FUEL,2013,103(0):29-36.
APA Yu, Jian.,Zeng, Xi.,Zhang, Juwei.,Zhong, Mei.,Zhang, Guangyi.,...&Xu, Guangwen.(2013).Isothermal differential characteristics of gas-solid reaction in micro-fluidized bed reactor.FUEL,103(0),29-36.
MLA Yu, Jian,et al."Isothermal differential characteristics of gas-solid reaction in micro-fluidized bed reactor".FUEL 103.0(2013):29-36.
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