Browsing by Author "Beltramone , Andrea Raquel"

Filter results by typing the first few letters
Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    HDN of indole over Ir-modified Ti-SBA-15.
    (Universidad Tecnológica Nacional Regional Córdoba., 2017) Ledesma , Brenda Cecilia; Anunziata, Oscar Alfredo; Beltramone , Andrea Raquel
    Iridium catalyst was prepared using a novel tita nium oxide-CMK-3 support synthesized as a replica of Ti SBA-15. The catalyst was applied in the hydrodenitrogena tion of indole. The activity was compared with an iridium catalyst supported over a grafted titanium-CMK-3. Struc tural and textural characterization of the catalysts was per formed by means of N2 adsorption, XRD, UV–Vis–D Raman spectroscopy, XPS, TEM and H2 Chemisorption. Ir-Ti-CMK-3 was the most active catalyst for the hydro denitrogenation reaction at mild conditions. Titanium oxide contained in carbon ordered mesoporous CMK-3 promotes a very good anchorage of iridium metallic clusters in the carbon framework reaching high active site distribution and more stable nanoclusters.
  • Thumbnail Image
    Item
    Noble-biometallic supported CMK-3 as a novel catalyst for hydrogenation of tetralin in the presence of sulfur and nitrogen.
    (Universidad Tecnológica Nacional Regional Córdoba., 2017) Vallés, Verónica Alejandra; Ledesma , Brenda Cecilia; Juárez, Juliana María; Gómez costa , Marcos Bruno; Anunziata, Oscar Alfredo; Beltramone , Andrea Raquel; Gómez costa , Marcos; Ledesma , Brenda
    Carbon ordered mesoporous CMK-3 with high surface area and high pore volume promotes a very good dispersion of Pt or Ir monometallic and Pt-Ir-bimetallic crystallites in the carbon framework. High active and stable nanospecies are responsible for the good activity and selectivity found in the hydrogenation of tetralin to decalin in the presence of N as indole and S as dibenzothiophene under mild conditions in a Batch reactor. The catalysts prepared were extensively characterized by XRD, N2 adsorption isotherms, XPS, TEM, ICP, CO Chemisorption and TPR. The analysis showed that the carbon mesoporous structure was maintained after metal incorporation, and very high dispersed metal-supported catalyst was obtained. The activity was compared using the turnover number, Pt-Ir-CMK-3 being the most active cat alyst in the presence of the inhibitors. The bimetallic catalyst showed more resistance to inhibition than monometallic catalysts. The reusability of Pt-Ir-CMK-3 suggests that it is a potential catalyst for hydrotreating reactions.
  • Thumbnail Image
    Item
    Novel Preparation of Titania-Modified CMK-3 Nanostructured Material asSupport for Ir Catalyst Applied in Hydrodenitrogenation of Indole.
    (Universidad Tecnológica Nacional Regional Córdoba., 2017) Ledesma , Brenda Cecilia; Juárez, Juliana María; Vallés , Verónica Alejandra; Anunziata, Oscar Alfredo; Beltramone , Andrea Raquel; Vallés , Verónica Alejandra
    Iridium catalyst was prepared using a novel tita nium oxide-CMK-3 support synthesized as a replica of Ti SBA-15. The catalyst was applied in the hydrodenitrogena tion of indole. The activity was compared with an iridium catalyst supported over a grafted titanium-CMK-3. Struc tural and textural characterization of the catalysts was per formed by means of N2 adsorption, XRD, UV–Vis–DR Raman spectroscopy, XPS, TEM and H2 Chemisorption. Ir-Ti-CMK-3 was the most active catalyst for the hydro denitrogenation reaction at mild conditions. Titanium oxide contained in carbon ordered mesoporous CMK-3 promotes a very good anchorage of iridium metallic clusters in the carbon framework reaching high active site distribution and more stable nanoclusters.