joule effect
8.The Boyle temperatures and the inversion temperatares of the Joule-Thomson effect were found from the second virial coefficient.
10.The result shows that chemical properties and matter constituent of coal surface are no changed , adsorption and desorption of the coal samples in AEF well accord with Langmuir equation and two constants empirical formula, and because coal potential energy is increased and coal temperature is raised caused by Joule heat effect , adsorption ability of coal is decreased, and the desorption process is slowed down in AEF.

