Effect of Water Content on Oxidative Combustion and Pyrolysis Characteristics of Gas Coal

ABSTRACT

The oxidative combustion and pyrolysis characteristics of gas coal with different water content (2.86%, 9.06%, 15.81%, 22.83%, and 30.12%) were systemically investigated by thermogravimetric – differential scanning calorimetry and low-temperature oxidation experiments. Results show that the mass loss and heat absorption-exothermic pattern are inconsistent in oxidative combustion and pyrolysis processes of gas coal containing water. The behavior of internal water dissipation in gas coal is consistent in oxidative combustion and pyrolysis processes, but the influence on them is significantly different in high-temperature stage (450–600 ℃), the internal water dissipation behavior makes the coal pyrolysis reaction faster and makes the coal oxygen reaction slower.

KEYWORDS:

• Thermal characteristics
• kinetic analysis
• low-temperature oxidation experiment
• activation energy
• gas coal containing water

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was funded by the National Natural Science Foundation of China [Grant Numbers 51874007]; Independent Research fund of Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining (Anhui University of Science and Technology) [NO.EC2021019].