Abstract：The isotherms of gas adsorption were done under different temperatures for samples from different mine areas by using the HCA adsorption constant determination. Through the analysis of experiment results, it discussed the effect of temperature on adsorption properties of coal. The experiment results proved that there is no monotonic function between the limit quantity of gas adsorption and temperature, and that adsorption constant b shows a well decreasing function with temperature because of the special structure of coal. Therefore, people should take full account into the coal type and temperature variation regularity of coal to determine the gas content of coal in engineering practice.

Keyword：adsorption capability;gas;absorption constant;