Experimental study on dynamic gas adsorption

In order to predict the actual adsorption amount as gas adsorption reaches the equilibrium, this research designed a dynamic gas adsorption experiment under constant temperature and pressure, and also studied the isopiestic adsorption characteristics of coal samples with same quality but different sizes. Through the experiment, the study found the adsorption-time changing relationships under different pressures of four different size samples. After regression analysis, we obtained the functional relationship between adsorption and time. According to this, the research resulted in the actual adsorption amount when gas adsorption reaches the equilibrium. In addition, the current study obtained the relationship between adsorption and pressure as well as the effect of the coal size to the adsorption rate. These results have great theoretical and practical significance for the prediction of gas amount in coal seam and gas adsorption process. (C) 2012 Published by Elsevier B.V. on behalf of China University of Mining & Technology.