SO2 sorption properties of fly ash zeolites

Abstract

In the presented study, the sulfur dioxide sorption properties of fly ash zeolite X were investigated. Sorptiontests were performed on fly ash zeolite samples that were not prepared specially for sorption, in addition to dried samplesand samples in the presence of water vapor. The samples saturated with water vapor showed the highest sorption capacity.The sorption capacity of the samples additionally dried prior to the sorption experiment was higher than that of thesamples that were not specially prepared for the sorption test. Regeneration tests indicated relatively good regenerationproperties. The obtained results were described with the use of Langmuir, Sips, and Dubinin–Astakhov models, withthe Dubinin–Astakhov model providing the best fit.