Conditions needed for satisfactory measurement of mass transfer coefficients, internal diffusivity and adsorption rate constants

Conditions are developed for the accurate measurement of mass transfer coefficients, internal diffusivity and adsorption rate constants using pulse gas chromatography within the limits of the approximation of the Kubin‐Kucera model for adsorption in a packed bed. Physisorption rates are shown to be many orders of magnitude higher than those measurable. Thus, pulse chromatography cannot be used to determine physisorption rate constants. Mass transfer coefficients at low Reynolds Numbers are shown to be measurable under severely restricted conditions.