CENTRO DE INVESTIGACION Y DESARROLLO EN CIENCIAS APLICADAS "DR. JORGE J. RONCO"
Unidad Ejecutora - UE
Ce, Mn and Ce/Mn ceramic monolithic catalysts for VOCs and PM removal
JORGE E. SAMBETH; J. ESTEBAN COLMAN LERNER; HORACIO J. THOMAS; MIGUEL A. PELUSO
JOURNAL OF RARE EARTHS
ELSEVIER SCIENCE BV
Lugar: Amsterdam; Año: 2016 vol. 34 p. 675 - 675
Ceramic supported cerium, manganese and cerium-manganese catalysts wereprepared by direct impregnation of aqueous precursor, and characterized byby scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller method (BET), temperature programmed reduction (H2-TPR), X-ray photoelectron spectroscopy (XPS) acidity measurements and electricalconductivity. The catalytic activity was evaluated for VOC (ethanol, methyl ethyl ketone and toluene) oxidation. Additionally, catalysts were tested in particulate matter (PM) combustion. The characterization results indicated that Ce is in the form of Ce4+ and Ce3+, and Mn existed in the form of Mn4+ and Mn3+ on the surface of the Mn/AC sample and in the form of Mn4+ in the Ce/Mn/AC monolith. VOC oxidation results revealed that the Ce/Mn/AC sample shows an excellent performance compared with ceramic supported CeO2 (Ce/AC) and MnOx(Mn/AC) samples. The PM combustion was also higher on Ce/Mn/AC monoliths.The enhanced catalytic activity was mainly attributed to the Ce and Mn interaction which enhances the acidity, conductivity and the reducibility of theoxides.