Isothermal differential characteristics of gas-solid reaction in micro-fluidized bed reactor

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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
刊名	FUEL
	2013
卷号	103 期号:0 页码:29-36
关键词	Micro-fluidized bed Gas-solid reaction Isothermal differential characteristics Reaction kinetics Graphite combustion
英文摘要	The 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.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Energy & Fuels ; Engineering, Chemical
研究领域[WOS]	Energy & Fuels ; Engineering
关键词[WOS]	NATURAL GRAPHITE ; THERMAL-ANALYSIS ; KINETICS ; OXIDATION ; MECHANISMS
收录类别	SCI
语种	英语
WOS记录号	WOS:000311932200006
公开日期	2015-05-27
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/13386]
专题	过程工程研究所_研究所（批量导入）
作者单位	Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
推荐引用方式 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.