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Título : Unsupported Molybdenum Carbide and Nitride Catalysts for Polychlorinated Biphenyls Hydrodechlorination
Autor : Del Toro, Raquel
Minichini, Marian
Brito, Joaquín L.
Betancourt, Paulino
Palabras clave : Mo carbide
Mo nitride
Hydrodechlorination
PCB
NiMo catalyst
Fecha de publicación : 31-Jul-2013
Editorial : springer
Citación : Catalysis Letters
Citación : Vol 143;11
Resumen : Unsupported Mo carbide and Mo nitride catalysts have been synthesized by temperature programmed synthesis, and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, H2-temperature programmed reduction and desorption and N2 physisorption. These solid compounds have been tested for the hydrodechlorination (HDCl) of polychlorinated biphenyls (PCBs) at 1 bar in a fixed bed reactor. The Mo carbides and the corresponding Mo nitride phases showed a catalytic activity higher than a conventional HDS catalyst consisting of alumina-supported NiMo sulfides (*35 %). Aroclor 1260 HDCl conversion results were related to spilt-over hydrogen species that were proposed to favor the hydrogenolysis of C–Cl bond on refractory phases. The original PCBs broad distribution changed almost completely to non-chlorinated biphenyl on the carbide and nitride catalysts.
URI : http://saber.ucv.ve/jspui/handle/123456789/5753
ISSN : 1011-372X
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