Role of the ru and support in sulfieded RuNiMo catalysts in simultaneous hydrodearomatization (HDA), hydrodesulfurization (HDS), and hydrodenitrogenation (HDN) reactions
Pawalec, B. Navarro, R.M.
Role of the ru and support in sulfieded RuNiMo catalysts in simultaneous hydrodearomatization (HDA), hydrodesulfurization (HDS), and hydrodenitrogenation (HDN) reactions - mar./abr. 2009 - 9 p. ; 1364-1372
Resúmen del autor: Simultaneous hydrodesulfurization (HDS), hydrodearomatization (HDA), and hydrodenitrogenation (HDN) reactions have been studied over sulfided RuNiMo/Al2O3 catalysts. The effects of Ru promotion and alumina support modification with HY zeolite and P on catalyst performance have been studied using a synthetic feed containing dibenzothiophene, toluene, naphthalene, and pyridine. Activity tests were carried out in a semi-automatic microplant equipped with a continuous flow reactor, working under conditions similar to industrial practice (P = 5 MPa, T = 285-360 °C, and liquid hourly space velocity (LHSV) = 3 and 4.5 h-1). The catalysts were characterized by SBET, X-ray diffraction (XRD), temperature-programmed reduction (TPR), temperature-programmed desorption of ammonia (TPD-NH3), and X-ray photoelectron spectroscopy (XPS) techniques. Activity tests revealed that optimal Ru loading is 1 wt % (nominal). Under fixed experimental conditions (300 °C, 5 MPa, and LHSV = 3 h-1), ultra-low sulfur diesel (S < 20 ppm S) was obtained over a Ru(1%)Ni(5%)Mo(14%)/ -Al2O3 catalyst from a feed containing 18361 ppm S. However, this catalyst showed similar capability toward aromatics and pyridine removal as a commercial NiMo/Al2O3 catalyst. At a reaction temperature of 345 °C, the 5% HY-Al2O3 substrate led to a small increase in the hydrogenation capability of this catalyst but without enhancement of its HDS/HDN capability. On the contrary, the P-modified substrate resulted in a lower activity. The properties of the supported catalysts are discussed in terms of the support effect and Ru promotion
Role of the ru and support in sulfieded RuNiMo catalysts in simultaneous hydrodearomatization (HDA), hydrodesulfurization (HDS), and hydrodenitrogenation (HDN) reactions - mar./abr. 2009 - 9 p. ; 1364-1372
Resúmen del autor: Simultaneous hydrodesulfurization (HDS), hydrodearomatization (HDA), and hydrodenitrogenation (HDN) reactions have been studied over sulfided RuNiMo/Al2O3 catalysts. The effects of Ru promotion and alumina support modification with HY zeolite and P on catalyst performance have been studied using a synthetic feed containing dibenzothiophene, toluene, naphthalene, and pyridine. Activity tests were carried out in a semi-automatic microplant equipped with a continuous flow reactor, working under conditions similar to industrial practice (P = 5 MPa, T = 285-360 °C, and liquid hourly space velocity (LHSV) = 3 and 4.5 h-1). The catalysts were characterized by SBET, X-ray diffraction (XRD), temperature-programmed reduction (TPR), temperature-programmed desorption of ammonia (TPD-NH3), and X-ray photoelectron spectroscopy (XPS) techniques. Activity tests revealed that optimal Ru loading is 1 wt % (nominal). Under fixed experimental conditions (300 °C, 5 MPa, and LHSV = 3 h-1), ultra-low sulfur diesel (S < 20 ppm S) was obtained over a Ru(1%)Ni(5%)Mo(14%)/ -Al2O3 catalyst from a feed containing 18361 ppm S. However, this catalyst showed similar capability toward aromatics and pyridine removal as a commercial NiMo/Al2O3 catalyst. At a reaction temperature of 345 °C, the 5% HY-Al2O3 substrate led to a small increase in the hydrogenation capability of this catalyst but without enhancement of its HDS/HDN capability. On the contrary, the P-modified substrate resulted in a lower activity. The properties of the supported catalysts are discussed in terms of the support effect and Ru promotion
