Investigation of the adsorption of nonpolar adsorbate molecules on the illite surface

Abstract

The full thermodynamic characteristics of CO 2 and CH 3 OH adsorption on the mineral illite were obtained using the adsorption -calorimetric method.The crystal chemistry of illite was studied using the polar CH 3 OH molecule and the quadrupole CO 2 molecule as a molecular probe.The mechanism of adsorption of these molecules, the conformation of the resulting ion/molecular complexes, and the thermokinetics of adsorption were revealed.The adsorption isotherms are studied and described by their corresponding equations.The molecular mechanism of CO 2 and CH 3 OH adsorption on illite was studied in the entire filling area.It has been established that under the influence of a polar methanol molecule, K + migrate to the basal and lateral faces of illite, filling vacant holes with six-dimensional CH 3 OH/K + complexes of illite, the state of molecules on the surface is close to liquid -like.The process of migration of cations is completely reversible.It was found that the adsorption of a quadrupole CO 2 molecule on illite does not lead to the migration of cations.Adsorption proceeds on K + cations, which occupy the basal one third of the illite surface.