Theoretical modeling of adsorption plays a crucial role in providing better understanding of the adsorption phenomena,isotherms and isosteric heats.Sorption-based storage applications require the development of predictive methods which are valid over wide temperature ranges.In this work,we discuss an extension of the multicomponent potential theory of adsorptions (MPTA) to model the prediction of adsorption isotherms to a wide temperature range for supercritical hydrogen,nitrogen and methane on various nanoporous adsorbent.