A Predictive Model for Coal Coking Based on Product Yield and Energy Balance

Marek Sciazko, Bartosz Mertas, Ludwik Kosyrczyk and Aleksander Sobolewski
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Marek Sciazko: Institute for Chemical Processing of Coal, Zamkowa, 41-803 Zabrze, Poland
Bartosz Mertas: Institute for Chemical Processing of Coal, Zamkowa, 41-803 Zabrze, Poland
Ludwik Kosyrczyk: Institute for Chemical Processing of Coal, Zamkowa, 41-803 Zabrze, Poland
Aleksander Sobolewski: Institute for Chemical Processing of Coal, Zamkowa, 41-803 Zabrze, Poland

Energies, 2020, vol. 13, issue 18, 1-16

Abstract: A series of experimental coal pyrolysis studies were conducted to define the parameters of a kinetic model to enable complete mass and energy balances by identifying basic process products. The developed model determines the chemical enthalpy of pyrolytic reactions, making it possible to determine the share of exothermic conversions in the coking process. To validate the model, a series of experimental pyrolysis tests of coking coals used in the coke plant and their blends were conducted, including TGA, retort, and industrial coke oven scale. Despite significant differences in the chemical composition of various coal types, element balancing allowed detection of the difference in product composition and the heat effects of the chemical conversion of such a complex substance as coal. Analysis of the heat effects of pyrolytic coal decomposition indicates substantial variability. In the first coking period, there are endothermic reactions; in the second, exothermic reactions occur. Average heat effect of the pyrolytic reaction for whole coking period is exothermic and, depending on the coal type, ranges from −5 to −50 kJ/kg. The model herein can be used to analyze many other pyrolytic processes because it also takes into account the heating rate.

Keywords: coal pyrolysis; coal coking; heat effect of pyrolysis; kinetics of pyrolysis; pyrolytic reactions (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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