Dodecatungstocobaltate supported over ZSM-5 zeolite as novel solid catalyst in selective sulfide oxidation

CLARA SAUX; CANDELARIA LEAL MARCHENA; LUIS PIZZIO; LILIANA PIERELLA

APPLIED CATALYSIS A-GENERAL

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2014

0926-860X

The catalytic behavior of a Keggin type potassium dodecatungstocobaltate (II) salt supported on ZSM-5 zeolite for wet peroxide oxidation of 2-(methylthio)benzothiazole as a model organic sulfide was thoroughly studied. The Keggin salt was incorporated in the MFI zeolite matrix by the wet impregnation method followed by calcination at 350 ºC. Catalysts were further characterized by XRD, UV-vis DR spectroscopy and SEM-EDAX techniques. Reaction parameters (nature of the solvent, hydrogen peroxide concentration, reaction time, catalyst mass, substrate initial concentration and reaction temperature) were evaluated to reach the optimum reaction conditions. Catalyst stability in several oxidation cycles was also examined.