Browsing by Author "Garcia-Fierro, J. L."

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    CONVERSION OF QUINOLINE ON ReS2 CATALYSTS: EFFECT OF THE SUPPORT AND THE ADDITION OF CS2 IN THE FEED
    (2017) Bassi, Romina; Camu, Esteban; Villarroel, Mirza; Gil-Llambias, Fco. Javier; Garcia-Fierro, J. L.; Escalona, Nestor; Baeza, Patricio
    The effect of supports and the addition of CS2 in the feed were studied on hydrodenitrogenation of Quinoline in a continuous flow reactor over ReS2/support catalysts at 300, 325 and 350 degrees C and 3MPa of H-2. The ReS2 supported on TiO2 displayed the highest activity followed by ZrO2, gamma-Al2O3 and SiO2 supports. The activity trend was correlated with the Re dispersion on the support. The effect of the addition of CS2 was increased activity until 2.5 v/v % content. At higher CS2 content the activity decreased due to competitive adsorption between CS2 and Quinoline on the active sites.
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    SUPPORT EFFECT ON CONVERSION OF QUINOLINE OVER ReS2 CATALYST
    (2016) Bassi, R.; Villarroel, M.; Gil-Llambias, F. J.; Baeza, P.; Garcia-Fierro, J. L.; Martinez, N.; Olivera, P.; Leiva, K.; Escalona, N.
    The conversion of quinoline over ReS2 supported on gamma-Al2O3, SiO2, ZrO2 and TiO2 catalysts in a batch reactor at 300 degrees C and 5 MPa of hydrogen pressure was studied. The catalysts were prepared by wet impregnation with a loading of 1.5 atoms of Re per nm(2) of support. The catalysts were characterized by N-2 adsorption, X-ray photoelectron spectroscopy (XPS) and X-ray powder diffraction (XRD). The Re(x)/supports catalysts displayed high activities for the conversion of quinoline, although negligible formation of N-free compounds (hydrodenitrogenation) were observed. The intrinsic activities of ReS2 were modified by the support decreased in the order: Re/TiO2 > Re/ZrO2 > Re/SiO2 > Re/g-Al2O3. The highest activity displayed by the Re/TiO2 catalyst was correlated with the Re dispersion and formation of ReS2 species. Meanwhile, the lower conversion of quinoline over the Re/ZrO2, Re/SiO2 and Re/g-Al2O3 catalysts was related to the combined effect of the textural properties of catalysts and the formation of ReS(2-x) species on the supports.
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    Tuning amphiphilic properties of Ni/Carbon nanotubes functionalized catalysts and their effect as emulsion stabilizer for biomass-derived furfural upgrading
    (2020) Herrera, C.; Barrientos, Lorena; Rosenkranz, Andreas; Sepulveda, C.; Garcia-Fierro, J. L.; Laguna-Bercero, M. A.; Escalona, Néstor