Abstract
ABSTRACT A new application of an inverse gas chromatographic technique, known as Reversed Flow Gas Chromatography (RFGC), which permits the experimental measurement of local isotherms, θ( p, T, ϵ) is presented. The method does not use analytical or numerical solutions of the classical integral equation comprising the energy distribution function, f(ϵ), as unknown, but it is based on a time function of gas chromatographic (GC) peaks obtained by short flow reversals of the carrier gas. It can be used for the measurement of local adsorption isotherms θ, as well as for the estimation of the related parameters such as local energies of adsorption ϵ, local adsorbed concentrations c s *, and local maximum monolayer capacities c max *. As a model system, we selected oxygen's adsorption onto three-way silica supported 25% Pt+75% Rh alloy catalyst.
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