In order to get an accurate method to measure the specific surface area and the distribution of pore size,the surface area and pore size property of a series of coal samples was investigated with isothermal nitrogen adsorption method under vacuum-pumping and gas sweeping and variant degassing conditions.

The surface area of the sinter determined by the BET adsorption isotherm technique is given out in this paper.

Characteristics and predictions for adsorption isotherms of methane/carbon dioxide binary gas on coals;