Энергетика адсорбции воды и ароматических молекул в дефектных и бездефектных цеолитах типа ZSM-5

Аннотация

Objects of the inquiry: adsorbents - silicalite, zeolites Na436ZSM-5, Na3 4ZSM-5 and Li436ZSM-5; adsorbates - water, benzene, p-xylcne. Aim of the inquiry: study of isotherms and basic thermodynamic characteristics of adsorption and mechanism of adsorption of gases and vapors in the defectlcss silicalite and in the defective and defcctless ZSM-5 zeolites with Li * and Na' exchange cations. Methods of inquiry: calorimetric, adsorption volumetric. The results achieved and their novelty: For the first time are submitted the precision data of isotherm and complete thermodynamic characteristics (AH, AF and AS) of benzene and p-xylcnc adsorption in the dcfectless silicalite, water and benzene adsorption in dcfectless Li4,3(,ZSM-5 and Na^ZSM-S zeolites and also in defective Na3 4ZSM-5, the stepwise character of changing of the heats of adsorption of the investigated systems with surface filling is revealed. For the first time the molecular mechanism of benzene and p-xylcne adsorption in defectless silicalite, water and benzene in both defective and dcfectless LiZSM-5 and NaZSM-5 zeolites in all area of filling is discovered. The practical value: The fundamental thermodynamic functions of the investigated systems arc of a practical value for the counting of processes and apparatuses of the sorption techniques. These tabulated data can be used in physical and colloid chemistry master courses as a handbook material.