Science and Technology Production
ACTAS XXVI International Materials Research Congress (IMRC 2017) - EXPERIMENTAL DESIGN OPTIMIZATION OF THE ODS OF DBT USING V2O5 SUPPORTED ON GA-SBA-15
Congreso
Date:
2017Publishing House and Editing Place:
Sociedad Mexicana de Materiales (SMM)Summary *
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. Information provided by the agent in SIGEVAKey Words
BoxBehnken DesignUltra-low-sulfur dieselGallium, DibenzothiopheneVOx supported Ga-SBA-15