Time distribution of adsorption entropy of gases on heterogeneous surfaces by reversed-flow gas chromatography

Determination of adsorption entropies on solid surfaces by reversed-flow gas chromatography

“…The time distribution of adsorption entropy of gases on heterogeneous surfaces [10] started in 1978 by Katsanos et al [11] who have determined experimentally both the differential enthalpy H ads and the differential entropy of adsorption S ads based on the equation:…”

“…whereS 0,g trans is the translational entropy, θ is the local adsorption isotherm, which can be calculated as described by the Jovanovich isotherm [10]:…”

Determination of Lewis Acid Base Properties of Poly(α-n-alkyl) Methacrylates Adsorbed on Silica by Inverse GC

“…In this way, a repeated sampling of slow rate processes taking place within the chromatographic column can be carried out. Using suitable mathematical analysis of the experimentally obtained chromatographic data, a big amount of physicochemical parameters have been estimated among the others: adsorption equilibrium constants, gas diffusion coefficients in binary and ternary mixtures, activity coefficients, mass transfer coefficients on solids and liquids, solubility and interaction parameters in polymer-solvent systems, molecular diameters and critical volumes in gases, Lennard-Jones parameters, as well as rate constants and activation parameters [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51].…”

Study of H-β-zeolite supported Rh catalyst by inverse gas chromatography

“…RF-GC permitted a direct determination of catalytic reaction rate constants, adsorption-adsorption rate constants, gas and surface diffusion coefficients, adsorption isotherm parameters, etc. [32][33][34][35] In the present work, the surface properties of H-␤-zeolite and Rh/H-␤-zeolite, the heat of adsorption, the free energy of adsorption, the surface free energy, as well as their specific and dispersive components, were investigated by IGC.…”