Temperature-programmed
desorption of n-hexane from hydrated HZSM-5
and NH4ZSM-5 zeolites |
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Authors: | Vera Dondur Vesna Raki? Ljiljana Damjanovi? Radmila Hercigonja Aline Auroux |
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Institution: | (1) Faculty of Physical Chemistry, Belgrade, Serbia and Montenegro, 11000, Studentski trg 12–16;(2) Faculty of Agriculture, Belgrade-Zemun, Serbia and Montenegro, 11080, Nemanjina 6;(3) Institut de Recherches sur la Catalyse, Villeurbanne, France, 69626, 2 Av. A. Einstein |
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Abstract: | Temperature-programmed
desorption coupled with mass spectrometer as a detector (TPD), IR and 13C
NMR measurements are used to study the adsorption of n-hexane
on hydrated HZSM-5 and NH4ZSM-5 zeolites. The 13C
NMR measurements show that n-hexane can
access the pore structure of ZSM-5 zeolites previously saturated with water.
TPD spectra of n-hexane are monitored in
the temperature region 50–300°C, in the case of fully or partially
hydrated samples; two-stage desorption of n-hexane
is found. Simultaneous desorption of water and n-hexane
in the same temperature region are found, in all investigated samples. |
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Keywords: | n-hexane adsorption temperature-programmed desorption ZSM-5 zeolite |
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