Experimental desing optimization of the ods of DBT using V2O5 supported on GA-SBA-15.
Date
2017
Journal Title
Journal ISSN
Volume Title
Publisher
Univesidsad Tecnológica Nacional
Abstract
Experiment design-response surface methodology (RSM) was used in this work to model and optimize
one response in the oxidative desulfurization of dibenzothiophene with hydrogen peroxide using
VOx-Ga-SBA-15 catalysts with different Ga/Si and V/Si ratios. In this study, we analyze the influence
of the nature of the catalyst (metal/Si ratio), the catalyst/substrate ratio and the oxidant/substrate
ratio as factors for the design. The response analyzed was conversion at 15 min of reaction time.
The response surfaces were obtained with the Box–Behnken Design, finding the best combination
between the reaction parameters that allowed optimizing the process. By applying the statistic
methodology, the higher levels of the objective function were obtained employing the catalyst with
Ga/Si and V/Si ratios of 1/15 and 1/25, respectively. Structural and textural characterization of the
catalysts were performed by means of XRD, N2 adsorption, UV–Vis–DRS, XPS, NMR, TEM, Raman, TPR
and Py-FTIR. UV–Vis–DRS and Raman demonstrated that highly dispersed vanadium pentoxide
crystallites are responsible for the high activity in the sulfur removal. The high dispersion depended
on the vanadium loading and on the nature of the support.
Description
Keywords
SBA-15, Ketorolac tromethamine, Nanostructured composite
Citation
XXV International Materials Research Congress.
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