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A Simplified Description of Char Combustion

Loewenberg, M. and Bellan, J. and Gavalas, G. R. (1987) A Simplified Description of Char Combustion. Chemical Engineering Communications, 58 (1-6). pp. 89-103. ISSN 0098-6445. doi:10.1080/00986448708911961.

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A simplified analysis of carbonaceous particle combustion is presented that includes the effects of pore diffusion and growth as well as gas-phase heat and mass transfer. The combustion dynamics are described by time-dependent equations for particle temperature, radius and a number of intraparticle conversion variables. These are coupled to pseudosteady equations for gas-phase transport and internal reaction and diffusion. The differential equations for gas-phase transport are reduced by quadrature to a nonlinear boundary condition to the intraparticle boundary value problem. Numerical calculations are performed for conditions relevant to pulverized coal combustion. An analytical solution of the intraparticle problem, pertinent to the regime of strong diffusional limitations, reduces the intraparticle solution into a set of two quadratures which drastically simplifies the numerical calculations. The simplified intraparticle solution is in excellent agreement with the full solution at 1800 K free stream temperature and fair agreement at 1500 K.

Item Type:Article
Related URLs:
URLURL TypeDescription
Bellan, J.0000-0001-9218-7017
Gavalas, G. R.0000-0003-1468-6835
Additional Information:© 1987 Gordon and Breach Science Publishers S.A. Received November 17, 1986; in final form January 15, 1987. This work was supported by DOE Office of Energy Utilization Research, ECUT Program.
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Subject Keywords:Carbon particle, Combustion dynamics, Reaction diffusion
Issue or Number:1-6
Record Number:CaltechAUTHORS:20151105-105158121
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61892
Deposited By: Ruth Sustaita
Deposited On:06 Nov 2015 20:14
Last Modified:10 Nov 2021 22:55

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