Elsevier

Fuel

Volume 66, Issue 2, February 1987, Pages 154-157
Fuel

Low temperature oxidation of coals—a calorimetric study

https://doi.org/10.1016/0016-2361(87)90233-XGet rights and content

Abstract

The rates of heat liberation and oxygen consumption due to coal oxidation were measured in the temperature range 20–170 °C using coals ranging from subbituminous to anthracite. It was found that the Elovitch equation fit the results for the heat generation rate excellently when it was modified slightly to include a corrective term representing the heat generation rate at the steady state. The oxygen consumption rate at a given temperature was found to be proportional to the product of the internal surface area and oxygen content of the coals, indicating that the oxygen containing surface groups are acting as reactive sites. Using these results, the heat evolved per mole of oxygen at steady state was calculated to be 75–90 kcal/mol.

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