Activation energy for the oxidation of Malaysian coal chars

Haji-Sulaiman, M.Z. and Aroua, M.K. (1997) Activation energy for the oxidation of Malaysian coal chars. Journal of the Institute of Energy, 70 (483). pp. 52-56. ISSN 0144-2600

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Abstract

The oxidation of two Malaysian coal chars has been studied by means of a thermal gravimetric analyser (TGA). The weight-loss data were analysed by the Temperature Program Reaction (TPR) technique, which employed the random pore model of Bhatia & Perlmutter1. All experiments were conducted within a temperature range of 698-773 K (isothermal condition) and heating rates of 2-10 K min-1 (dynamic condition) with char samples in the size range 53-75 μm. It was found that the random pore model can accurately describe the oxidation of char to yield activation energy that is similar to that obtained from model free kinetics, provided the structural parameter ψ, which is an input to the model, is taken as an adjustable parameter.

Item Type: Article
Additional Information: Cited By (since 1996):7 Export Date: 21 April 2013 Source: Scopus CODEN: JINED Language of Original Document: English Correspondence Address: Department of Chemical Engineering, University Malaya, 50603 Kuala Lumpur, Malaysia References: Bhatia, S.K., Perlmutter, D.D., (1981) AIChE J, 27, p. 226; Miura, K., Silveston, P.L., (1989) Energy & Fuel, 3, p. 243; Chen, Y., Mori, S., (1995) Energy & Fuel, 9, p. 71; Tsai, C.Y., Scaroni, A.W., (1987) Fuel, 66, p. 1400; Tseng, H.P., Edgar, T.F., (1984) Fuel, 63, p. 385
Uncontrolled Keywords: Activation energy; Gravimetric analysis; Mathematical models; Oxidation; Reaction kinetics; Malaysian coal chars; Charcoal.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 17 Jul 2013 08:11
Last Modified: 11 Dec 2013 02:13
URI: http://eprints.um.edu.my/id/eprint/7510

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