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Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5
Published on: August 25, 2016
Non-Linear Enthalpy-Entropy Correlation for Nitrogen Adsorption in Zeolites
Montserrat R Delgado1, Carlos O Arean2
1Department of Chemistry, University of the Balearic Islands, E-07122 Palma, Spain. montserrat.rodriguez@uib.es.
Abstract:
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 (ΔH⁰) and entropy (ΔS⁰) 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 ΔH⁰ and ΔS⁰. Implications of such a correlation for gas separation and purification by adsorption in porous solids are highlighted.
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