The University of Southampton
University of Southampton Institutional Repository

Approximations to the DAEM for Coal Pyrolysis

Please, C.P., McGuinness, M. J. and McElwain, D.L.S. (2003) Approximations to the DAEM for Coal Pyrolysis Combustion and Flame, 133, (1-2), pp. 107-117. (doi:10.1016/S0010-2180(02)00554-0).

Record type: Article


The Distributed Activation Energy Model (DAEM), used for the pyrolysis of a range of materials (including coal, biomass, residual oils and kerogen), assumes that the thermal decomposition of numerous components is described by a distribution of activation energies. Existing theories are reviewed with particular focus on methods used to evaluate solutions quickly and efficiently. This paper demonstrates that previous approaches taken to simplify the methods of solution can usually be identified as belonging to one of two distinct and physically relevant regimes. A careful analysis in these two regimes is given based upon asymptotic expansions, leading to systematic methods for rapidly finding accurate approximations. The new theory results in simple expressions for the devolatilisation rate of a given distribution of reactants. The method thereby provides a rapid and highly effective method for estimating kinetic parameters and the distribution of activation energies. Comparison of the simplified results with existing theories and with calculations of the full model are given. The methods provide a useful basis for calculations of coupled models of volatilisation and combustion, and for models with spatially varying temperatures

Full text not available from this repository.

More information

Published date: 2003
Keywords: coal volatilization, fast evaluation, asymptotic analysis, inverse problem


Local EPrints ID: 29261
ISSN: 0010-2180
PURE UUID: f83654d4-1a60-4901-a21a-9f3d1c0e27f7

Catalogue record

Date deposited: 12 May 2006
Last modified: 17 Jul 2017 15:58

Export record



Author: C.P. Please
Author: M. J. McGuinness
Author: D.L.S. McElwain

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.