Activity and surface properties of NiMo/SiO2-Al2O3 catalysts for hydroprocessing of heavy oils
Por:
Leyva C., Ancheyta J., Travert A., Maugé F., Mariey L., Ramírez J., Rana M.S.
Publicada:
28 may 2012
Resumen:
NiMo/SiO2-Al2O3 mixed oxide supported catalysts were investigated for hydroprocessing of heavy crude oil at moderate reaction conditions. Hydrodesulfurization (HDS), hydrodemetalization (HDM), hydrodeasphaltenization (HDAs) and hydrodenitrogenation (HDN) reactions were studied as function of time-on-stream (TOS). The results indicated that HDS of crude oil corresponds to the number of active metal sites (sulfide phases) present in the catalyst, HDN is enhanced when the catalyst presents a combination of well dispersed sulfide phases and weak to moderate acidity. HDM presented a complex behavior indicating that it is affected significantly not only by the dispersion of the sulfide phase but also by the porosity and acidity of the catalyst. As expected, for HDAs both acidity and textural properties are important. The stability of the catalyst with time-on-stream was affected by coke and metals deposition. The supports and fresh catalysts were characterized by nitrogen physisorption, SEM-
Filiaciones:
Leyva C.:
Instituto Mexicano Del Petróleo, Eje Central Lázaro, Cárdenas Norte 152, Mexico City 07730, Mexico
Ancheyta J.:
Instituto Mexicano Del Petróleo, Eje Central Lázaro, Cárdenas Norte 152, Mexico City 07730, Mexico
Travert A.:
Laboratoire Catalyse et Spectrochimie, CNRS-ENSICAEN, Université de Caen, 6 Boulevard du Maréchal Juin, 14050 Caen Cedex, France
Maugé F.:
Laboratoire Catalyse et Spectrochimie, CNRS-ENSICAEN, Université de Caen, 6 Boulevard du Maréchal Juin, 14050 Caen Cedex, France
Mariey L.:
Laboratoire Catalyse et Spectrochimie, CNRS-ENSICAEN, Université de Caen, 6 Boulevard du Maréchal Juin, 14050 Caen Cedex, France
Ramírez J.:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Ingn Quim, UNICAT, Mexico City 04510, DF, Mexico
UNICAT, Departamento de Ingeniería Química, Cd. Universitaria, Coyoacán, Mexico City 04510, Mexico
Rana M.S.:
Kuwait Institute for Scientific Research, PRD, P.O. Box 24885, Safat 13109, Kuwait
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