Numerical modelling of low rank coal for spontaneous combustion

Kyuro Sasaki, Yongjun Wang, Yuichi Sugai, Xiaoming Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Transportating and stockpiling low-rank coals are puts them under risk of spontaneous combustion, because they are very easy to get self heating ignition after drying or removing moisture due to high moisture and oxygen contents. In this study, the modified concept of Equivalent Oxidation Exposure-time (EOE-Moisture time) has been presented for row-rank coals. The equations for the EOE-Moisture time have been formulated by considering moisture content and oxidation capacity in low temperature range to predict the heat generating rate as functions of coal moisture saturation and oxygen concentration in the pile. Numerical simulations were carried out by applying the EOE-Moisture time on self-heating of low rank coal by changing the coal stockpile size. It has been shown based on the numerical simulations that the temperature rising rate of the pile is increased with lower initial moisture saturation of low rank coal. It has been shown that coal including a large percent of moisture is easy to increase temperature and has a smaller critical diameter of coal stockpile size compared with coals with low moisture.
Original languageEnglish
Title of host publicationProceedings of the 2014 Coal Operators’ Conference
EditorsNaj Aziz
PublisherUniversity of Wollongong
Number of pages6
ISBN (Electronic) 978 1 925100 02 0
Publication statusPublished - Feb 2014
Event14th Coal Operators’ Conference (COAL2014) (Wollongong, Australia) - Wollongong, Australia
Duration: Feb 13 2012Feb 14 2014


Conference14th Coal Operators’ Conference (COAL2014) (Wollongong, Australia)

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Safety Research
  • General Earth and Planetary Sciences


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