"NiMo(W)- based hydrotreatment catalysts supported on peach stones activated carbon"

P. VÁZQUEZ; L. PIZZIO; M.BLANCO,; C. CÁCERES,; H. THOMAS; R. ARRIAGADA,; S. BENDEZÚ,; R. CID; R. GARCÍA

APPLIED CATALYSIS A-GENERAL

Elsevier

Lugar: Amsterdam; Año: 1999 vol. 184 p. 303 - 313

0926-860X

The NiMo(W) and PNiMo(W) catalysts supported on carbon obtained from peach stones were studied. The catalysts wereprepared using two different impregnation techniques: pore ®lling and excess of solution. Impregnating solutions ofmolybdenum or tungsten iso- and heteropolyanions were used as precursors of the active components. The textural propertiesof the catalysts were determined, and also they were characterized by Fourier transform infrared spectroscopy, temperatureprogrammed reduction and scanning electron microscopy. Their surface acidity and their hydrodesulfurization (HDS) andhydrodenitrogenation (HDN) activities were measured.The positive in¯uence of phosphorus on HDS and HDN activity of both molybdenum and tungsten-based catalysts wascon®rmed. It was found that the HDN activity depends strongly on the preparation method and on the Wand Mo precursorsused in the impregnating solution. The PNiMo and PNiW catalysts on carbon prepared by impregnation with heteropolyanionssolutions were as or more active for HDN reaction than those obtained from the classical isopolyanions. # 1999 ElsevierScience B.V. All rights reserved.