GIBBS FREE ENERGY OF AMMONIA ADSORPTION IN LTA ZEOLITES
Keywords:
adsorption, free energy, isotherm, pressure, relative pressure, microcalorimeter, ammonia.Abstract
This paper presents experimentally obtained values of the adsorption isotherm of ammonia molecules in LTA zeolites at a temperature of 303 K. The Gibbs free energy was calculated from the equation describing the work performed during the change in gas volume at constant temperature. A regular relationship between the amount of ammonia adsorbed and the Gibbs free energy in LTA zeolites was established. Under experimental conditions, it was determined that the change in the Gibbs free energy of ammonia adsorption for these zeolites varies, particularly depending on the quantity of cations present in the zeolite structure. It is shown that the Gibbs free energy is dependent on the cation content of LTA zeolite.
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