自然発火初期における石炭の発熱現象について

抄録

It is very important to obtain a knowledge of the exothermic phenomenon of coal at low temperature, because it represents much better the initial state of spontaneous combution. In the previous paper, th6 writers stated that the following equation would exist in relation to the shape of cracks or roadways and the heat of oxidizing reaction:
4·L·b·G/d·w·γ·cν=K∫θLa/θeθ₀dθ
where a and K are constant values relating to the reaction which shall be determined in this experiment, for a definite relation must exist among the values of the length L, the diameter d and the air velocity w at such a roadway as any spontaneous combustion does not occur
In this experiment, the writers first measured the velocity of heat generation as well as the temperature rise of coal, and then its heat value at low temperature, from which results it was recognized that the half of the heat generation should be originated from the oxygen absorption of coal in a wet atmosphere.