Nitrogen Diffusion in KNaA Zeolite at Pressures Ranging
from 20 to 100 MPa

A. A. Pribylov and S. M. Kalashnikov

Institute of Physical Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 117915 Russia

Received July 2, 1996

Abstract—Equilibrium sorption isotherms for nitrogen on NaA zeolite in a pressure range of 0.1–160 MPa and
a temperature interval of 305–595 K were measured. Diffusion coefficients and activation energies of nitrogen
in KNaA zeolite were determined in the pressure and temperature ranges 20–100 MPa and 476–623 K, respec-
tively. The obtained diffusion coefficients were found to be independent of adsorptive pressure. The adsorption
process was shown to be determined by diffusion of nitrogen molecules from one -cage to another.

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