TY - JOUR TI - A study on spontaneous ignition of bituminous coal AU - Li Xin-Rui AU - Koseki Hiroshi AU - Iwata Yusaku JN - Thermal Science PY - 2009 VL - 13 IS - 1 SP - 105 EP - 112 PT - Article AB - The thermal properties of four bituminous coals were studied using isothermal and temperature-programmed calorimeters, such as a differential thermal analysis, a heat flux calorimeter C80 and an thermal activity monitor (TAM-III). The corresponding spontaneous ignition was measured in an adiabatic spontaneous ignition tester. It was found that there were weak exothermic activities in bituminous coal at 50-100°C and meanwhile carbon monoxide and carbon dioxide was generated. These thermal behaviors are responsible for the self heating from 50°C and spontaneous ignition at 80°C.