Non-Linear Enthalpy-Entropy Correlation for Nitrogen Adsorption in Zeolites

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 (ΔH(0)) and entropy (ΔS(0)) from an analysis of the IR spe...

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Detalles Bibliográficos
Autores principales: Delgado, Montserrat R., Arean, Carlos O.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6278468/
https://www.ncbi.nlm.nih.gov/pubmed/30445693
http://dx.doi.org/10.3390/molecules23112978
Descripción
Sumario: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 (ΔH(0)) and entropy (ΔS(0)) from an analysis of the IR spectra recorded over a range of temperatures. The results obtained, taken together with previously reported values for N(2) adsorption on protonic zeolites, revealed a non-linear correlation between ΔH(0) and ΔS(0). Implications of such a correlation for gas separation and purification by adsorption in porous solids are highlighted.

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