石炭の表面反応に関する研究
混合ガス雰囲気内での吸着現象について
1971 年 87 巻 1001 号 p. 521-525
詳細
1971 年 87 巻 1001 号 p. 521-525
In earlier papers about the gas adsorption on coal, the authors have shown the heats of adsorption and the activation energies for diffusion in the range of temperatures 24-75°C.
In this paper, we carried out the mixed gas adsorption experiments in order to know if the atmosphere in mines might influence on the spontaneous combustion of coal.
We measured the amounts of gas adsorbed with gravimetric method.
From this work on the adsorption of oxygen-methane and nitrogen mixtures on coal, the results obtained are summerized as follows.
1) In the initial stage of adsorption, coal adsorbed much more amounts of oxygen with decreasing temperature.
2) The adsorption isotherms during 4 hours obeyed the Freundlich equation.
3) In the range of temperatures from 50 to 75°C, the oxidation of coal did not effect by methane composing the gas mixtures.
4) In mixed gas atmosphere, the gas adsorption process is different between at higher temperatures and atlower one. Namely, the former is controled by physical phenomena mainly, the latter is added to chemical reaction with considerable velocity.
