Temperature programmed desorption of n-hexane and n-heptane from MFI and FAU zeolites |
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Authors: | Wacław Makowski Dorota Majda |
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Affiliation: | (1) Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland;(2) Regional Laboratory for Physicochemical Analyses and Structural Research, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland |
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Abstract: | TPD studies of n-hexane and n-heptane from NaX, Y and ZSM-5 (Na+ or H+ exchanged) in the experimental system with a TCD detector were performed, using pure He or He/n-alkane mixture as a carrier gas. The TPD profiles with one desorption peak for Y and two peaks for ZSM-5, measured using He/hydrocarbon mixture, were similar to the previously reported equilibrated thermodesorption results. TPD profiles were accurately fitted with a model based on the equilibrium control of the desorption and the adsorption functions derived from the Langmuir or dual site Langmuir isotherms. |
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Keywords: | Adsorption Temperature programmed desorption Zeolites n-Hexane n-Heptane |
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