Hydrodenitrogenation of over Ir supporteD Ti-SBA-15 modified with F AND AI.
Date
2015
Journal Title
Journal ISSN
Volume Title
Publisher
Univesidsad Tecnológica Nacional.
Abstract
The hydrodenitrogenation of Indole has been studied over a series of Ti-modified SBA 15 supports and their respective Ir-catalysts. Ti-SBA-15 was synthesized using sol-gel
method and Ti was added during the synthesis using TEOT as Ti source. Ti was
incorporated into the framework replacing the Si atoms in the mesoporous structure.
Ir/Ti-SBA-15 with and without F and/or Al were prepared to improve the catalytic activity.
F and Al have been incorporated by wetness impregnation method. The effect of the
incorporation of F and Al in the mesoporous structure was tested in the
hydrodenitrogenation reaction of indole. The catalysts were extensively characterized
by X-ray diffraction (XRD), N2 adsorption isotherms, TEM, FTIR and UV-vis-DRS and
Raman spectroscopy. The low angle X-ray analysis showed for all the materials
intensive reflection, characteristic of SBA-15 structure. The mesoporous structure was
maintained after F and Al incorporation. The results showed that Ti incorporation
reduces significantly the cluster size and improves considerably the Ir cluster
dispersion. The catalytic activity of Ir/Ti-SBA-15 modified with F and Al, with higher
acidity, avoided the irreversible adsorption of indole. The catalytic activity was studied in
a 4563 Parr reactor, at 250°C, 15 atm of pressure of hydrogen and 360 rpm. The
catalysts synthesized had good activity measured in hydrodenitrogenation of indole at
mild conditions. The preliminary results show these materials as promising catalysts for
HDN reactions.
Description
Keywords
Iridium-Platinum containing SBA-15, Indole Hydrodenitrogenation
Citation
XXIV International Materials Research Congress, 2015.
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