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Discrete Simulation of Cenospheric Coal-Char Combustion

Sahu, Ranajit and Flagan, Richard C. and Gavalas, George R. (1989) Discrete Simulation of Cenospheric Coal-Char Combustion. Combustion and Flame, 77 (3-4). pp. 337-346. ISSN 0010-2180. doi:10.1016/0010-2180(89)90139-9.

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A phenomenological model of structural transformations during pulverized coal char combustion is presented. The random geometry of the voids is modeled realistically by means of a random assemblage of spheres in a spherical particle. Pore connectedness and growth are accounted for as the combustion proceeds. The percolation behavior of the void space is dramatically demonstrated. The effects of different initial void fractions and of the random nature of the structure itself, at a given initial void fraction, are shown. This sheds some light on our ability to realistically model the solid. The limitation of shrinking core models of combustion of cenospheric chars are demonstrated. In this initial application, the model is limited to isothermal combustion with no diffusional limitations.

Item Type:Article
Related URLs:
URLURL TypeDescription
Flagan, Richard C.0000-0001-5690-770X
Gavalas, George R.0000-0003-1468-6835
Additional Information:Copyright © 1989 by The Combustion Institute. Received 26 May 1988; revised 20 October 1988. This work was supported by the U.S. Department of Energy under grant number DE-AC2284FC70915.
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC2284FC70915
Issue or Number:3-4
Record Number:CaltechAUTHORS:20150805-110229393
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Official Citation:Ranajit Sahu, Richard C. Flagan, George R. Gavalas, Discrete simulation of cenospheric coal-char combustion, Combustion and Flame, Volume 77, Issue 3, 1989, Pages 337-346, ISSN 0010-2180, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59215
Deposited By: Irina Meininger
Deposited On:11 Sep 2015 22:28
Last Modified:10 Nov 2021 22:16

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