Abstract
The oxidative desulfurization (ODS) process has emerged as a new technology to achieve ultra-low sulfur levels in diesel fuels. This work presents the performance of MoOx-VOx based catalysts in the ODS process and an evaluation of the interaction between MoOx and VOx in these bimetallic catalysts, using Al2O3 as catalytic support, and hydrogen peroxide and tertbutil-hidroperoxide as oxidant agents. The catalysts were characterized by scanning electron microscopy (SEM-EDX), nitrogen physisorption, X-ray diffraction (XRD) and temperature programed reduction (TPR). The catalytic activity of MoOx-VOx/Al2O3 was higher than the monometallic catalysts: MoOx/Al2O3 and VOx/Al2O3. The characterization results suggested that in MoOx-VOx catalysts the molybdenum species interact strongly with the support and that the vanadium species were distributed mainly as isolated-vanadium species, due to the interaction between VOx and MoOx.
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