Abstract
AbstractAdsorption data of ethene, propene and 1‐butene on a mesoporous Sc2O3 sample are reported. Measurements were carried out in a volumetric apparatus and cover the range 213–373 K, at pressures up to 55 kPa. The theory of the adsorption potential has been applied to correlate adsorption data of olefins. Use has also been made of a multilayer adsorption approach, which takes into account the surface heterogeneity and makes it possible to calculate the parameters of an exponential distribution function of the sites according to their energies. Thermodynamic interfacial quantities (isosteric heat of adsorption and differential molar entropy) are determined from the adsorption data. A relationship between the isosteric heat of adsorption and the energetic parameter of the multilayer adsorption model is established and verified.
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