Multiple Equilibrium Analysis Description of Adsorption on Na−Mordenite and H−Mordenite

Abstract

Adsorption isotherms are reported for Na−mordenite and H−mordenite at several temperatures with a series of gas adsorptives above their critical temperature. The data sets are analyzed with the multiple equilibrium analysis (MEA) method [Drago, R. S.; et al. J. Am. Chem. Soc. 1998, 120, 538−547. Drago, R. S.; et al. J. Phys. Chem. B 1997, 101, 7548−7555], which produces equilibrium constants (Ki), capacities (ni), and thermodynamic parameters (enthalpies, ΔHi, and entropies, ΔSi) of adsorption for each process. The limited pore size distribution present in the zeolite mordenite presents an interesting comparison to the amorphous carbons studied previously by MEA [Drago, R. S.; et al. J. Phys. Chem. B 1997, 101, 7548−7555]. The results of the MEA description of the adsorption data gathered for the interaction of an adsorbate (particularly, N2, CO, and Xe) with Na−mordenite and H−mordenite are compared to other literature reports (including infrared spectroscopic studies and Monte Carlo simulations), and go...