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Showing 1 to 20 of 38 for “"SBA-15"”.
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Biofuels Production Via Catalytic Hydrocracking Of Ddgs Corn Oil And Hydrothermal Decarboxylation Of Oleic Acid Over Transition Metal Carbides Supported On Al-Sba-15
… nickel−tungsten (Ni−W) carbide supported on Al-SBA-15 was designed based on the ability of nickel to adsorb and activate hydrogen and the potential of tungsten for hydrogenation reactions. Four different Ni−W ratios (1:9, 1:1, 2:1, and 9:1) were prepared by the impregnation method to study the …
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Trägereinfluss bei Vanadiumoxid-Katalysatoren zur selektiven Oxidation kurzkettiger Alkane
… einem geordneten mesoporösen Silica-Material (SBA-15) als hochdisperse Vanadiumoxide aufgebracht wurden. Um den Einfluss des Trägermaterials auf die katalytischen Eigenschaften der Vanadiumoxid-Spezies zu untersuchen, wurde das SBA-15 mit hochdispersen Titanoxiden modifiziert. Durch …
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Sillica Nanoporous Materials Adsorption and Release Study
… called mesoporous silicates such as MCM-41, SBA-15 has attracted the attention of many scientists as drug delivery vehicles for their outstanding features like high surface area, high porosity, well-ordered, tunable nanometer pores and "non-cytotoxic" properties.</p> <p>In this dissertation, …
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Biofuels production from hydrotreating of vegetable oil using supported noble metals, and transition metal carbide and nitride
… ZSM-5, zeolite â, USY, ã-alumina oxide, and Al-SBA-15 were prepared by the temperature-programmed reaction method and the effects of process parameters on catalytic hydrocracking of soybean oil were investigated. 100% conversion of soybean oil was attained under the 650 psi and 360-450 oC …
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Nanostructured Porous High Surface Area Ceramics for Catalytic Applications
… ceramic materials. Ordered mesoporous silica SBA-15 was found to be useful as a hard template for the nanocasting of silicon carbide and allowed the preparation of high temperature stable mesoporous silicon carbide ceramics. Chemical vapor infiltration of SBA-15 with dimethyldichlorosilane at …
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Síntese e caracterização de materiais mesoporosos inorgânico-orgânicos para aplicação na adsorção de gás carbônico
… are having enough focus. The family of the SBA is within these materials, which can be highlighted the SBA-15 and SBA-16 as structures with interesting textural properties. In the present work was carried out the synthesis of these materials according to the methodology described in the …
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Flexible and Versatile Soft Templates for Mesoporous Silicas and Organosilicas Based on Pluronic Block Copolymer Surfactants and their Mixtures
… such as 2-D hexgonal ordered mesoporous silicas (SBA-15) as well as single-micelle-templated silica and organosilica nanotubes and nanospheres using triblock copolymer surfactants and their mixtures in the presence of a swelling agent. The introductory section, Chapter 1, will address the current …
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Development of Amino Acid-based Solid Sorbents for Post-Combustion CO2 Capture
… lysine ([EMIM][Lys])-loaded PE-SBA-15 and SBA-15-SA sorbents exhibited the highest CO2 adsorption capacities of 1.5 mmol/g-sorbent at 30 ˚C under a dry gas inlet (15% CO2). It is expected that the capacities can be still elevated to an optimum capacity range of 2-4 mmol/g-sorbent …
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Kinetic study of dry reforming of Methane with Ni over different supports and Pt/Al2O3
… were used to support Ni nanoparticles: Al2O3, SBA-15, and ZrO2. In order to investigate CH4 and CO2 influence of on the DRM reaction, the different partial pressure of CH4 and CO2 were dosed into the reactors in a parameter field test. In order to study the influence of products CO and H2 on …
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Mesostructured metal oxide-based nanocomposites as sorbents for H2S removal from syngas coal gasification
… results of R&D efforts to develop efficient MeOx/SBA-15-based sorbents for H2S removal in view of possible applications in hydrogen purification, air pollution control, and deep desulphurization of fossil fuels. It is precisely in the latter topic that the research project was born. The production …
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Novel mesoporous silicates as indoor air pollutant scavengers
… as the organic template synthesising MCM-41 and SBA-I5, respectively. A selection of the successfully synthesised mesoporous silicates were modified with propyl amine to investigate the possibility of formaldehyde chemisorption. Material characterisation was performed using powder x-ray …
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Non-thermal Plasma Assisted Catalytic Upgrading of Low-cost Hydrocarbons
… higher than 40% can be achieved over the SBA-15 catalyst. Unlike the conventional thermos-catalytic process, activated methane can directly convert into the liquid product without the participation of any other co-reactants, with the liquid product primarily composed of gasoline range …
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X-ray Scattering Study Of Capillary Condensation In Mesoporous Silica
… Periodic mesoporous silica such as MCM-41 and SBA-15 were synthesized and used as the samples with water as the capillary condensation agent.The gas sorption method and SAXS were used to extract the pore parameters of the samples.The stresses acting on the silica scaffold due to the presence of …
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Phasenverhalten reiner Stoffe in mesoporösen Silika-Materialien
… geordnete mesoporöse Materialien (MCM-41 und SBA-15, Porenweiten 2 -10 nm)mit nativen und modifizierten Oberflächen hergestellt. Die erhaltenen Materialien wurden mittels N2-Adsorption, XRD, NMR, REM und TEM charakterisiert. Der fest/flüssig Phasenübergang von Wasser, Benzol und halogenierten …
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Protein adsorption on nanostructured silica surfaces
… wall. The adsorption of lysozyme in mesoporous SBA-15 silica materials with native and chemically modified pore walls was studied over a wide pH range. To assess the observed differences in the protein uptake capacity of the materials, a geometrical pore filling model was developed that takes …
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Processi di desolforazione mediante l'utilizzo di adsorbenti e catalizzatori solidi
… as a model compound is presented here. Pure SBA-15 and silicas, as well as Al-modified SBA-15 and MAS-5, were used as supports, due to the well known structural and textural stability of such mesoporous materials under the HDS reaction conditions. Transition metal oxides were added by wetness …
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Ion specific effects on charged interfaces
… Ordered Mesoporous Material (OMM), namely SBA-15, dispersed in an aqueous solution and thus forming a solid-liquid charged interface. Potentiometric titrations (PT) were used to estimate the surface charge density (σ) of silica surface of SBA-15 particles in water at different pH values. …
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Catalytic Conversion of Lignocellulosic Biomass to Carboxylic Acids and Derivatives
… to lactic acid. In Chapter 5, the mesoporous Zr-SBA-15 materials with increased Lewis acidity compared to ZrO2 were synthesized in order to increase the yields of lactic acid esters. Alkyl lactates were produced from sugars and cellulose with this catalyst in relevant alcohols in a one-pot …
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