Abstract
The reversed-flow gas chromatography (RF-GC), which is a version of inverse gas–solid chromatography (IGC) was used to measure the local adsorbed concentrations and the local adsorption energies on various active sites of the surface of MgO, SiO 2 , Cr 2 O 3 and CdS for the adsorbed analyte n -heptane, and the local adsorption isotherms on these heterogeneous surfaces. All three above adsorption parameters mentioned above are calculated from chromatographic peaks as a function of the experimental time (a time-resolved analysis). The surface diffusion coefficients for all gas–solid systems mentioned above have been also determined experimentally.
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