Abstract
Sulfur dioxide is adsorbed on zeolites Y in two forms. The amount of the stable form (Tdes=350–390 K) changes in proportion to the sodium content in the zeolite The stable form is localized in a large void at a distance of ∼1.8 å from the SII position and causes redistribution of sodium cations. The weakly bound form (Tdes=286–300 K) makes the main contribution to the adsorption of SO2 on highly siliceous zeolites Y and is formed by adsorbate-adsorbate interaction, and it is apparently delocalized in a large void. Out-of-framework aluminum compounds that are formed during dealumination decrease the free volume of the zeolite without changing the nature of interaction of SO2 with the zeolite.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 535–541, March, 1991.
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Sharonova, O.M., Dubkov, A.A., Kirik, S.D. et al. Study of the adsorption of sulfur dioxide on dealuminated zeolites Y by thermal desorption and powder X-ray diffraction. Russ Chem Bull 40, 459–464 (1991). https://doi.org/10.1007/BF00957975
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DOI: https://doi.org/10.1007/BF00957975