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MATHEMATICAL MODELING OF LIGNITE COMBUSTION IN A BED: A ONE-DIMENSIONAL APPROACH

ABSTRACT
Thermal plant design and choice of suitable technology requires the understanding of the fuel thermo-chemical properties. The reactions that consist of different phases may be approached in two ways. One is to determine the kinetics of each individual reaction and its interaction with the environment. The other method is to use an integrated approach, when, based on the results, the summary formula for the behavior of combustible matter is obtained. This is an empirical approach. Despite possible objections, particularly regarding its accuracy, the narrow range of applicability etc., the attractiveness of this procedure is evident due to direct results, simplicity and far lower costs to the experiment. That is the reason why this paper focuses on determining the kinetic parameters of the integrated model of group reactions that are part of the combustion of lignite at low temperatures. The paper develops a simple mathematical model of the combustion process for lignite in bed which is then confirmed by modeling the experimental results.
KEYWORDS
PAPER SUBMITTED: 2015-07-10
PAPER REVISED: 2015-11-27
PAPER ACCEPTED: 2015-11-29
PUBLISHED ONLINE: 2015-12-13
DOI REFERENCE: https://doi.org/10.2298/TSCI150710188M
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE 6, PAGES [2159 - 2169]
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© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence