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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Bulletin > Reports of the Faculty of Engineering, Nagasaki University > Volume 41, No. 76 >


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Title: ガス成分を変調させた過渡応答熱分析法による膨張黒鉛の酸化予測
Other Titles: Oxidation Prediction of Exfoliated Graphite using Transient Thermal Analysis Replying to Pulsed Feeding of Reaction Gas
Authors: 佐野, 秀明 / 鄭, 国斌 / 内山, 休男
Authors (alternative): Sano, Hideaki / Zheng, Guo-Bin / Uchiyama, Yasuo
Issue Date: Jan-2011
Publisher: 長崎大学工学部 / Faculty of Engineering, Nagasaki University
Citation: 長崎大学工学部研究報告, 41(76), pp.61-65; 2011
Abstract: A novel transient thermal analysis for oxidation was developed in order to predict mass loss during oxidation of exfoliated graphite. The kinetics of oxidation were estimated from amount of CO and CO2 gas formation due to the response to pulsed feeding of reaction gas at the temperatures ranging from 500° to 800°C. This method enables carrying out gas-solid reactions with a controllable reaction progress at programmed temperature and without the effect of diffusion of reaction gas and formed gas on the kinetics of graphite oxidation. The method also provides the opportunity of simultaneous monitoring of changes in response to self-heating and calculating amount of burn-off ratio during oxidation. From oxidation rate as a function of oxidation temperature and burn-off ratio, and consideration of the diffusion effect of gases, mass loss of graphite can be estimated successfully by means of calculation using a differential-difference equation concerning oxidation rate under given temperature-programmed oxidation condition. The technique has beneficial features that the precise information about the oxidation can be obtained from only once test with one sample.
Keywords: Exfoliated graphite / Oxidation / Thermal analysis / Kinetics / Mass change prediction
URI: http://hdl.handle.net/10069/24637
ISSN: 18805574
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:Volume 41, No. 76

Citable URI : http://hdl.handle.net/10069/24637

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