ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Characterization of various types of adsorption centers on zeolites using heats of adsorption

V. Patzelová

J. Heyrovský Institute of Physical Chemistry and Electrochemistry, Czechoslovak Academy of Sciences, 121 38 Prague

Abstract: The importance of various types of adsorption centers on faujasite-type zeolite was studied with model adsorbates. The degree of heterogeneity of the surface was modified by changing tne no. of cations in the Y zeolite with the general formula Na_xH_1-xY. This was done by replacing Na by NH₄ followed by decompn. Adsorbates capable of specific interactions (CO, C₂H₄) prefer cationic centers, esp. cations in large cavities. Nonspecifically sorbed mols. (C₁-C₃ satd. hydrocarbons) interact with the zeolite skeleton during adsorption. Their heats of adsorption are not affected by the no. of cations. Active centers formed by substitution of cations by protons are energetically less pronounced.

Full paper in Portable Document Format: 293a331.pdf

Chemical Papers 29 (3) 331–337 (1975)