Effect of Pyrolysis Reactions on Coal and Biomass Gasification Process

Tomasz Chmielniak, Leszek Stepien, Marek Sciazko and Wojciech Nowak
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Tomasz Chmielniak: Department of Thermal and Fluid Flow Machines, Faculty of Energy and Fuels, AGH University of Science and Technology, 30-059 Krakow, Poland
Leszek Stepien: Department of Fuel Technology, Faculty of Energy and Fuels, AGH University of Science and Technology, 30-059 Krakow, Poland
Marek Sciazko: Center of Energy, AGH University of Science and Technology, 30-059 Krakow, Poland
Wojciech Nowak: Department of Thermal and Fluid Flow Machines, Faculty of Energy and Fuels, AGH University of Science and Technology, 30-059 Krakow, Poland

Energies, 2021, vol. 14, issue 16, 1-21

Abstract: Thermodynamic analysis of a gasification process was conducted assuming that it is composed of two successive stages, namely: pyrolysis reaction followed by a stage of gasification reaction. This approach allows formulation the models of selected gasification processes dominating in industrial applications namely: Shell (coal), SES (coal), and DFB (dual fluid bed, biomass) gasification. It was shown that the enthalpy of fuel formation is essential for the correctness of computed results. The specific computational formula for a wide range of fuels enthalpy of formation was developed. The following categories were evaluated in terms of energy balance: total reaction enthalpy of gasification process, enthalpy of pyrolysis reaction, enthalpy of gasification reaction, heat demand for pyrolysis reaction, and heat demand for gasification reactions. The discussion of heat demand for particular stages of gasification related to the various processes was performed concluding the importance of the pyrolysis stage.

Keywords: pyrolysis; gasification; enthalpy of formation; enthalpy of reaction (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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