Abstract
Changes in the surface properties and porous structure of montmorillonite have been studied upon substitution of exchangeable Na+ ions by methylammonium and ethylammonium cations. It has been found that the modification significantly affects adsorption properties of montmorillonite with respect to benzene. Based on measured isosteres of benzene adsorption/desorption by dehydrated samples of montmorillonite in Na+, CH3NH+3, and C2H5NH+3 forms, the heats of adsorption and desorption have been determined as functions of the amount of adsorbed substance.
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