The thermodynamics of dinitrogen adsorption in faujasite-type zeolites, Na-Y, Ca-Y and Sr-Y, were investigated by means of variable-temperature infrared spectroscopy, a technique that affords determination of the standard adsorption enthalpy (Δ⁰) and entropy (Δ⁰) from an analysis of the IR spectra recorded over a range of temperatures. The results obtained, taken together with previously reported values for N₂ adsorption on protonic zeolites, revealed a non-linear correlation between Δ⁰ and Δ⁰. Implications of such a correlation for gas separation and purification by adsorption in porous solids are highlighted.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6278468 | PMC |
| http://dx.doi.org/10.3390/molecules23112978 | DOI Listing |
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