主催: 日本エネルギー学会, 石炭科学部会, コークス工学研究部会, 重質油部会
共催: 日本学術振興会 石炭・炭素資源利用技術第 148 委員会, 化学工学会 エネルギー部会, （公財）北九州観光コンベンション協会, ガス化部会, 燃焼部会, 「エネルギー学」部会
会議名: 第55回石炭科学会議
回次: 55
開催地: 北九州国際会議場
開催日: 2018/10/29 - 2018/10/30
p. 52-53
Temperature increase of dried brown coal packed in a small tube reactor was measured in the gas stream of either wet air or dry air. The reactor was placed in a temperature controlled air circulating oven. In the wet air stream big temperature increase was observed even at 50 °C of oven temperature, whereas the temperature increase was very small in dry air even at 110 °C of oven temperature. The temperature changes of coal bed with time and position of the reactor were well simulated by simple one-dimensional energy and mass balance equations. Simulation in a wet air stream at 70 °C of oven temperature under adiabatic condition showed spontaneous heating of coal leading to combustion, showing that the spontaneous combustion is caused by simultaneous effects of water vapor adsorption and air oxidation.
