Adsorption of benzoic acid on synthetic calcite dispersed in cyclohexane as a function of temperature

摘要: The adsorption of benzoic acid on synthetic calcite dispersed in cyclohexane has been studied between 296 and 346 K. results can be successfully explained by a two-step model involving Langmuir first layer molecules oriented parallel to the surface next, as concentration adsorbate liquid phase increases, gradual replacement this with monolayer perpendicular surface. maximum determined 7.345 µmol/m2, independent temperature, close theoretical value 7.4 µmol/m2. constant for second step, which adsorbed are replaced ones, varies from 2 x 10(3) L/mol at K 16 K, enthalpy entropy changes associated part process 37.9 kJ/mol 0.191 respectively. In same temperature interval step parallely is estimated fairly constant, within factor best fit 33 L/mol. Copyright 1998 Academic Press.