Determination of the Texture of Narrow-Pore Zeolites by the Dynamic Desorption Method

Abstract

This work describes the first application of the desorption of nitrogen under dynamic conditions to characterize the texture of a natural zeolite. These dynamic conditions are very similar to those in actual sorption and catalytic processes. It was found that, under the experimental conditions described, nitrogen is desorbed from narrow-pore zeolites with a kinetic parameter comparable with the diameter of the nitrogen molecule in two separate steps that can be both qualitatively and quantitatively assigned to the amorphous and microporous fractions of the test zeolite.