Experimental Desing Optimization of the ODS of DBT using V2O5 supported on Ga-SBA-15.
Date
2020
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 v1/15 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
ODS, DBT, V2O5, Ga-SBA-15, ODS DBT
Citation
XXV International Materials Research Congress.
Endorsement
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