Effect of moisture on adsorption of methane on coal

Adopting the Langmuir monolayer theory for methane adsorption of coal,the effects of moisture to methane adsorption of coal was studied.Using the WY-98B-type gas constant detector to analyze the curve of isothermal adsorption,Langmuir pressure and adsorption constants a and b of two coal samples with qualitative and quantitative at different moistures.The equation for pressure effects on adsorption quantity was gained and the equation for moisture effects on adsorption constants a and b was gained too.The result of experiment shows that containing moisture coal sample fit the Langmuir adsorption equation and adsorption constants a and b and change of water content in coal samples have correlation.