Dependence of the Combustion Heat of Coal on Its Chemical Composition
Chemistry for Sustainable Development
||black coal, elemental composition, coal combustion heat, calorimetry
Institute of Coal Chemistry and Material Science, Siberian Branch of the Russian Academy of Sciences, Pr. Sovetskiy 18, Kemerovo 650000 (Russia)
Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Lavrentyeva 5, Novosibirsk 630090 (Russia)
The high heat value of black coal was measured in a calorimetric set-up. Analysis of the data showed that the coal combustion heat is directly dependent on carbon content. An increase in oxygen content causes a decrease in the calorific efficiency of raw coal. Confirmatory calculation of coal combustion heat according to the empirical formulas of Mendeleev, Dulong, Vondracek, Nivel and Given showed that the smallest deviations of calculated Qdaf values from experimental data on combustion heat may be obtained using Mendeleev's and Nivel's formulas.