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


Yörük B., Arısoy A.

COMBUSTION SCIENCE AND TECHNOLOGY, vol.194, no.13, pp.2674-2692, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 194 Issue: 13
  • Publication Date: 2022
  • Doi Number: 10.1080/00102202.2021.1885388
  • Journal Name: COMBUSTION SCIENCE AND TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Applied Science & Technology Source, Chemical Abstracts Core, Compendex, Computer & Applied Sciences, Environment Index, INSPEC
  • Page Numbers: pp.2674-2692
  • Keywords: coal drying kinetics, coal reaction kinetics, Coal self-heating incubation, low-temperature oxidation
  • Istanbul Technical University Affiliated: Yes

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.