  In this paper, we present a detailed numerical implementation of the
multicomponent potential theory of adsorption which is among the most accurate
gas mixtures adsorption models. The implementation uses the NIST Refprop
database to describe fluid properties and applies to pure gases and mixtures in
both subcritical and supercritical regimes. The limitations of the model and
the issues encountered with its implementation are discussed. The adsorption
isotherms of CH4 / CO2 mixture are modeled and parameterized as implementation
examples.
