Determination of Binary Adsorption Isotherms of Gases Using Concentration Pulse Chromatography

Mixture adsorption isotherms of gases need to be determined for their use in designing separation systems. Some techniques used to experimentally determine these isotherms include the gravimetric, the volumetric, the breakthrough and the concentration pulse chromatographic techniques. Although it has not been used very frequently in the literature, the latter is an experimental technique that is easy to set up, to use and analyze.

In this presentation, the concentration pulse chromatographic technique will be reviewed for determining binary adsorption isotherms of gases. Some examples from the literature will be given and its versatility to be used for ideal, as well as non-ideal gas mixtures will be demonstrated. Binary adsorption isotherms determined by this method will be compared to the ones determined by other methods and the corresponding observed agreements will be shown.