A series of dealuminatead faujasitic zeolites, obtained from the ammonium form of Y zeolite, was prepared by two different methodologies: a relatively common self-steaming method, where temperatures in the range 813 to 1093 K were used, and a less well studied solid-state dealumination method using ammonium hexafluorosilicate, which employed a lower temperature (453 K) than those used in the self-steaming method. It was possible to obtain samples by solid-state dealumination with both high levels of dealumination and good crystallinity. Textural and surface chemistry parameters, such as the micropore volume and the hydrophobic character of the surface, respectively, were correlated with the extent of dealumination. The adsorption isotherms of two selected volatile organic compounds (VOCs), one oxygenated (methyl ethyl ketone) and the other chlorinated (1,1,1-trichloroethane), were measured at 298 K by the gravimetric method. For one of the samples obtained by solid-state dealumination in particular, the adsorption isotherms of the studied VOCs presented adequate characteristics for the adsorption of these molecules, namely significant adsorption capacity and a moderately rectangular shape. This latter aspect can be of importance, for instance, in terms of regeneration of the adsorbent.

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