Development of a Mathematical Model for Simulating the Self-Heating Behavior of Moist Coal


Yörük B. , Arısoy A.

COMBUSTION SCIENCE AND TECHNOLOGY, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume:
  • Publication Date: 2021
  • Doi Number: 10.1080/00102202.2021.1885388
  • Title of Journal : COMBUSTION SCIENCE AND TECHNOLOGY

Abstract

Oxidation of fresh coal in the low-temperature region involves a series of processes. This starts with the adsorption of oxygen on the available fresh coal pore surfaces and continues with the high rate oxidation of coal. A new reaction kinetics expression has been proposed covering the whole low-temperature region of coal self-heating. Also, a comprehensive evaporation/drying model has been developed and validated to express the moisture removal rate of coal during self-heating. By combining these two improvements for describing the self-heating process a more robust mathematical model has been developed. Calculations have been carried out using an arbitrary-precision arithmetic algorithm in MATLAB. The model predictions have been validated by the actual moist coal self-heating behavior in an adiabatic oven.