Possibility of Using -Plots, Obtained from Nitrogen Adsorption for the Valuation of Zeolites

Abstract

Data of adsorption isotherms of nitrogen adsorption at 77 K on various samples of zeolites were measured. Besides derivation of specific surface area by BET analysis, samples were characterised by values obtained by t -plots; specific surface areas of mesopores and specific volumes of micropores are also calculated. Results show the value of the use of t -plot method for the characterization of microporosity changes in zeolites after various treatments, and also for quantitative estimation of zeolite content in natural zeolites and the crystallinity of synthetic zeolites.