Exploring the impact of textural and intrinsic properties of coal on the devolatilization and low-temperature char gasification of low-rank Indian coal.
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| Title: | Exploring the impact of textural and intrinsic properties of coal on the devolatilization and low-temperature char gasification of low-rank Indian coal. |
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| Authors: | Majumdar, Dibyarup1 (AUTHOR), Mahajani, Sanjay M.1 (AUTHOR) sanjaym@iitb.ac.in |
| Source: | International Journal of Coal Preparation & Utilization. 2026, Vol. 46 Issue 4, p885-911. 27p. |
| Subject Terms: | *Coal gasification, *Pyrolysis kinetics, *Quality (Philosophy), *Surface properties, *Coal industry, *Activation energy, *Thermolysis |
| Abstract: | A notably sustainable method of coal utilization is its gasification to produce syngas, a chemical precursor. Despite process significance, studies of the effect of the properties of Indian coal used in industrial gasification on the kinetics of pyrolysis and subsequent low-temperature char gasification are relatively scarce. There is also a dearth of studies that look at the determination of such kinetics for the same coal feed. This study endeavors to bridge such gaps by employing an experiment-modeling approach to calculate the kinetic parameters and draw conclusions based on the results. The apparent kinetic parameters for pyrolysis were determined by considering four stages- stage 0, stage 1, stage 2 and onset-offset rapid region of devolatilization. Notably, the results underline the influence of properties like pore size, volatile matter and oxygenate on the devolatilization process. The inferential thermodynamic study showed positive enthalpy change with incrementing conversion indicative of the endothermicity and non-spontaneity of the process. In succession, the kinetics of the low-temperature CO2-char gasification at actual gasification inception temperatures was determined, culminating in activation energy values in the range 88–101 kJ/mol. The results illuminate the influence of textural and intrinsic properties, particularly the alkali index on the kinetics of the reaction. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Abstract: | A notably sustainable method of coal utilization is its gasification to produce syngas, a chemical precursor. Despite process significance, studies of the effect of the properties of Indian coal used in industrial gasification on the kinetics of pyrolysis and subsequent low-temperature char gasification are relatively scarce. There is also a dearth of studies that look at the determination of such kinetics for the same coal feed. This study endeavors to bridge such gaps by employing an experiment-modeling approach to calculate the kinetic parameters and draw conclusions based on the results. The apparent kinetic parameters for pyrolysis were determined by considering four stages- stage 0, stage 1, stage 2 and onset-offset rapid region of devolatilization. Notably, the results underline the influence of properties like pore size, volatile matter and oxygenate on the devolatilization process. The inferential thermodynamic study showed positive enthalpy change with incrementing conversion indicative of the endothermicity and non-spontaneity of the process. In succession, the kinetics of the low-temperature CO2-char gasification at actual gasification inception temperatures was determined, culminating in activation energy values in the range 88–101 kJ/mol. The results illuminate the influence of textural and intrinsic properties, particularly the alkali index on the kinetics of the reaction. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 19392699 |
| DOI: | 10.1080/19392699.2025.2481488 |
