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Mathematical models of the thermal decomposition of coal: 2. Specific heats and heats of reaction

โœ Scribed by David Merrick

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
840 KB
Volume
62
Category
Article
ISSN
0016-2361

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โœฆ Synopsis

Published data on the specific heat of coal and coke have been analysed and have been used to define a model which predictsthe specific heat of coal during thermal decomposition. The Einstein model is used to describethevariation of specific heat with temperature and the effect of composition isdetermined by assuming that thevibrational energy at any temperature is the same for each atom. A new explanation for the endothermic reactions below 650ยฐC reported by previous workers is proposed as a consequence of the unexpectedly high specific heats predicted in this region using the above model. The exothermic reactions occurring at high temperatures appear to be attributable to the evolution of methane.

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