A5053214363- Catalysis and Hydrodesulfurization Studies
- Catalytic Processes in Materials Science
- Nanomaterials for catalytic reactions
- Catalysts for Methane Reforming
- Catalysis for Biomass Conversion
- Zeolite Catalysis and Synthesis
- Catalysis and Oxidation Reactions
- Industrial Gas Emission Control
- Biodiesel Production and Applications
- Petroleum Processing and Analysis
- Electrocatalysts for Energy Conversion
- Chemical Thermodynamics and Molecular Structure
- Mesoporous Materials and Catalysis
- Heat transfer and supercritical fluids
- Microwave Dielectric Ceramics Synthesis
- Advanced Photocatalysis Techniques
- Analytical Chemistry and Chromatography
- 2D Materials and Applications
- Phase Equilibria and Thermodynamics
- Ammonia Synthesis and Nitrogen Reduction
- Advancements in Battery Materials
- Chemical Synthesis and Reactions
- Computational Drug Discovery Methods
- Ferroelectric and Piezoelectric Materials
- Layered Double Hydroxides Synthesis and Applications
Petrobras (Brazil)
2012-2024
Universidade Federal do Rio de Janeiro
2015
Centro de Estudos e Pesquisa em Saúde Coletiva
1998
Centre National de la Recherche Scientifique
1995-1997
Institut de Recherches sur la Catalyse et l'Environnement de Lyon
1997
H-trititanate nanotubes obtained by alkali hydrothermal treatment of TiO2 followed proton exchange were compared to their bulk H2Ti3O7 counterpart with respect thermally induced structural transformation paths. As-synthesized and heat-treated samples characterized XRD, TEM/SAED, DSC spectroscopy techniques, indicating that showed the same sequence transformations as conventional solid state reaction. Nanostructured converts into TiO2(B) via multistep without losing its nanotubular...
Aromatic saturation is an important reaction for improving the cetane number of diesel streams. NiMo sulfide catalysts supported on alumina (Alu), silica–alumina (Si–Al), and alumina-Y zeolite (AluZ) were prepared with similar dispersions variable acidities. These tested in hydroconversion tetralin, indan, decalins, alkylbenzenes to evaluate effect support acidity overall activity distribution products. NiMo/Alu generated essentially hydrogenated products while presence acid component...
Tetralin hydroconversion over supported iridium catalysts has been investigated under a pressure of 4 MPa in the presence H2S continuous high-pressure gas-phase microreactor. Decalin, naphthalene, ring-contraction bicyclic products and one-ring-opening are formed. A screening silica, alumina amorphous silica–alumina (ASA) supports demonstrates that only ASA provides thiotolerance ring opening/contraction selectivity to nanoparticles. By testing Ir/ASA with various ratios but similar Ir...
The effects of phosphorus content on competitive hydrodesulfurization (HDS) 4,6-dimethyldibenzothiophene (4,6-DMDBT) and hydrodenitrogenation (HDN) quinoline (Q) over NiMo catalysts were evaluated. Reactions carried out in a trickle-bed high-pressure flow microreactor. HDS 4,6-DMDBT was strongly inhibited at Q concentrations 90 ppmw N, mostly hydrogenation (HYD) route HDS, suggesting that compete for the same active sites, which confirmed by products' distribution HDN reactions. Morphology...
Four aluminas were used as supports for impregnation with a zirconium oxide the aim to achieve coating, without phase separation, between support and modifier. The impregnated different concentrations of aqueous resin, obtained through polymeric precursor method. After samples calcined then characterized by XRD, which led identification crystalline zirconia in from each used. Using simple geometric model maximum amount surface modifier required complete coating layer unit cells was...
Two NiMo catalysts were prepared by different methods using citric acid to assess the effects of preparation method on dibenzothiophene hydrodesulfurization (HDS) and simultaneous HDS hydrodenitrogenation: co-impregnation post-treatment. Characterization oxide was performed nitrogen physisorption, X-ray diffraction, temperature-programmed sulfidation, while sulfided samples characterized reduction (TPR-S) NO chemisorption. The catalytic evaluation for reaction in a three-phase reactor, with...