A5023697675- Catalytic Processes in Materials Science
- Catalysis and Hydrodesulfurization Studies
- Nanomaterials for catalytic reactions
- Catalysis and Oxidation Reactions
- Petroleum Processing and Analysis
- Industrial Gas Emission Control
- Catalysts for Methane Reforming
- Gas Sensing Nanomaterials and Sensors
- Adsorption and biosorption for pollutant removal
- Mesoporous Materials and Catalysis
- TiO2 Photocatalysis and Solar Cells
- Graphene research and applications
- Minerals Flotation and Separation Techniques
- Advanced Photocatalysis Techniques
- Zeolite Catalysis and Synthesis
- Water Quality Monitoring and Analysis
- Electrocatalysts for Energy Conversion
- Advancements in Battery Materials
- Extraction and Separation Processes
- Pigment Synthesis and Properties
- Electrochemical Analysis and Applications
- Iron oxide chemistry and applications
- Magnetic Properties and Synthesis of Ferrites
Universidad de Santiago de Chile
2006-2022
University of the Andes
2014
Universidad Católica Silva Henríquez
2013
The importance of the isoelectric point for preparation and characterization functional materials to understand their behavior optimize performance is highlighted, with especial focus on industrial catalysts. In different liquid-phase steps involved in synthesis, knowledge surface charge as a function pH medium fundamental, since it dynamizing agent processes such gelation, peptization, coagulation agglomeration form solid particles. Therefore, zeta potential (ζ) measurements, often based...
In this work the adsorption of 4,6-dimethyldibenzothiophene (4,6-DMDBT) on different supports (SiO 2 , Al O 3 zeolite 4A, 13X, natural zeolite, and activated carbon), incorporating its surface first series transition metal oxides at content, was studied.The results indicate that carbon presents a higher capacity than other studied, which it is assumed to large number functional groups present surface.The incorporation support, induces in some cases increase capacities 4,6-DMDBT these...
The adsorption of refractory sulfur molecule 4,6-Dimethyldibenzothiophene (4,6-DMDBT) over copper supported on zirconia, using different loadings (2-10% w/w) and a zirconia support with high specific surface area, was studied.The results showed that the capacity 4,6-DMDBT Cu/ZrO 2 increased content, reaching maximum at around 8% Cu (0.58 mmol per gram adsorbent).The characterizations H -TPR, Electrophoretic Migration, XRD demonstrated this loading (8%) also corresponds to dispersion for ZrO...
The removal of 4-Nitrophenol (4-NP) from aqueous media by adsorption is studied in a batch system using different porous materials: activated carbon, zirconia, alumina, sepiolite, natural zeolite and 13X zeolite.Depending on their capacities, the best adsorbent was chosen to be impregnated with levels nickel (Ni) order study π-complexation continuous systems.The samples Ni(x)/support (x= 2, 4, 6%) were prepared wet impregnation characterised same method as all materials, N 2...
In this work we have carried out the adsorption of pyridine using three different supports (activated carbon, SiO 2 and γ-Al O 3 ).After choosing best support, due to its higher capacity, impregnated support with nickel at concentrations (2, 4 6% w/w) by wet impregnation study π-complexation.All samples (supports adsorbents) were characterized N adsorption-desorption BET method electrophoretic migration.The experimental results, for supports, show that capacity is better 3, isoelectric...
The effect of Mo loading (10, 12, 15, 17 and 20 wt.%) on the physicochemical properties reactivities Mo(x)/g-Al 2 O 3 sulfide catalysts for conversion 2-methoxyphenol at 573 K 5 MPa hydrogen pressure were studied.The characterized by specific area (S BET ), electrophoretic migration (EM), X-ray photoelectron spectroscopy (XPS) surface acidity techniques.The highest observed catalyst with a 15 wt.% was attributed to an increase in number active sites due highly dispersed species.At higher...
The influence of fluorine concentration on the synergism between Co/γ-Al 2 O 3 and Mo/γ-Al stacked beds separated by 3-mm γ-Al F x (x = 0 -2.5%), in hydrodesulphurization refractory molecules contained gasoil, under operating conditions similar to those industry, was studied.The results shown, that increases with content, reaching a maximum at 0.8% fluorine, which it is related changes zero point charge (ZPC) acid strength, due incorporation fluorine.The conversion most molecule reported...
This study analyses the hydrodenitrogenation (HDN) of pyridine using a stacked bed catalyst system, composed first hydrogenating Re/γ-Al 2 O 3 or W/γ-Al , over second Ni-Re/γ-Al (HDN bed).Using potentiometric methods, it can be seen that shows higher acidic strength than .The results show activity levels are obtained working with systems compared to separate catalysts.These suggest incorporation beds would favour formation hydrogenated intermediary products, facilitating removal N-containing...
The conversion of quinoline over ReS 2 supported on g-Al O 3 , SiO ZrO and TiO catalysts in a batch reactor at 300•C 5 MPa hydrogen pressure was studied.The were prepared by wet impregnation with loading 1.5 atoms Re per nm support.The characterized N adsorption, X-ray photoelectron spectroscopy (XPS) powder diffraction (XRD).The Re(x)/supports displayed high activities for the quinoline, although negligible formation N-free compounds (hydrodenitrogenation) observed.The intrinsic modified...