Catalysts - Synthesis
Nickel-based perovskite catalysts: synthesis and catalytic tests in the production of syngas (Catalisadores à base de níquel com estrutura perovskita: síntese e testes catalíticos na produção de gás de síntese)
... the synthesis of mixed oxides with perovskite structure is ...the synthesis was decomposed to 800 °C, except for samples with 70% of lanthanum substitution, whose temperature was close to 900 ...the ...
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Esterification of camphene over heterogeneous heteropoly acid catalysts : synthesis of isobornyl carboxylates.
... the synthesis of flavors and fragrances ...homogeneous catalysts, which results in serious technological and environmental ...acid catalysts for the conversion of terpenes can contribute significantly ...
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Síntese catalisadores heterogêneos utilizando como matéria-prima o rejeito do beneficiamento mineral visando a produção de biodiesel / Synthesis heterogeneous catalysts using the reject of mineral benefit as a raw material for biodiesel production
... Heterogeneous catalysts have significant advantages in the production of biodiesel, such as; less contamination of products; ease of separating the catalyst from the reaction medium; possibility of reusing the ...
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SYNTHESIS OF ZEOLITE SOCONY MOBIL FROM BLUE SILICA GEL AND RICE HUSK ASH AS CATALYSTS FOR HYDROTHERMAL LIQUEFACTION
... Catalysts are often used to increase the production of biofuels from the HTL process. These are generally either alkaline catalysts [20], such as KOH, NaOH, LiOH, and CsOH, or acid catalysts. Acidic ...
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Fischer-Tropsch Synthesis on Multicomponent Catalysts: What Can We Learn from Computer Simulations?
... Abstract: In this concise review paper, we will address recent studies based on the generalized-gradient approximation (GGA) of the density functional theory (DFT) and on the periodic slab approach devoted to the ...
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Hydrothermal synthesis of iron oxide photo-fenton catalysts: the effect of parameters on morphology, particle size and catalytic efficiency
... hydrothermal synthesis (Tadic et ...as catalysts in water clean-up based on hydrogen peroxide advanced oxidation processes (AOPs) has attracted increasing attention due to their high activity, surface area, ...
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Synthesis, characterization and photocatalytic activity of nanostructured TiO2 catalysts doped with metals.
... 2 CATALYSTS DOPED WITH METALS. Titanium dioxide nanostructured catalysts (nanotubes) doped with different metals (silver, gold, copper, palladium and zinc) were synthesized by the hydrothermal method in ...
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Biodiesel Synthesis: Influence of Alkaline Catalysts in Methanol-Oil Dispersion
... total synthesis time and was poorly favored compared to methanolysis due to the increase in ...The catalysts decreased the dispersion time, although most of them increased the methanol-oil interfacial ...
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Biodiesel synthesis: influence of alkaline catalysts in methanol-oil dispersion
... total synthesis time and was poorly favored compared to methanolysis due to the increase in ...The catalysts decreased the dispersion time, although most of them increased the methanol-oil interfacial ...
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Synthesis of Ziegler-Natta catalysts: some routes and their difficulties.
... SYNTHESIS OF ZIEGLER-NATTA CATALYSTS: SOME ROUTES AND THEIR DIFFICULTIES. The Ziegler-Natta catalyst and the polymerization thereof are systems which require careful han- dling and special treatment of ...
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Síntese de carbonato de dietila a partir de etanol e CO2 em catalisadores de zircônia = Synthesis of diethyl carbonate from ethanol and CO2 over zirconia catalysts
... Estudar a reação catalítica de produção de dietil carbonato a partir de etanol e CO 2 utilizando catalisadores heterogêneos a base de zircônia.. Estudar as caracteristícas[r] ...
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UNIVERSIDADE FEDERAL DE SÃO CARLOS CENTRO DE CIÊNCIAS EXATAS E DE TECNOLOGIA DEPARTAMENTO DE QUÍMICA PROGRAMA DE PÓS-GRADUAÇÃO EM QUÍMICA “NANOESTRUCTURED CATALYSTS FOR ORGANIC REACTIONS: DESIGN, SYNTHESIS AND APPLICATIONS”
... One the most famous mesoporous materials till date is MCM-41 (Mobil Composition of Matter No. 41), a type of silica with highly ordered hexagonal pores with a very narrow pore size distribution. This material was ...
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Isomerization of a-pinene oxide over cerium and tin catalysts : selective synthesis of trans-carveol and trans-sobrerol.
... A remarkable effect of the solvent nature on the acid catalyzed transformation of ␣-pinene oxide allowed direction of the reaction to either trans-carveol or trans-sobrerol. Each of these highly valuable com- pounds was ...
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Impeded solid state reactions and transformations in ceramic catalysts supports and catalysts
... allowing synthesis of new solid materials with desired structures and properties ...metal catalysts re- duction of the active surface area is caused by ...
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p-cymene based ruthenium complexes as catalysts
... (acetonitrile/methanol solvent system) was followed but instead of using dppf, DPEPhos was used as the phosphine ligand. Instead of obtaining the monomer, a trichloro-bridged dimer containing two DPEPhos and two ...
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SBA-15 as a support for nickel-based catalysts for polymerization reactions
... for spherical and traditional fiber-shaped SBA-15 samples are similar. However, the pore diameter of spherical SBA-15 is 1.7 nm smaller than for traditional fiber-shaped SBA-15. We attributed this to the increase in ...
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Advanced heterogeneous porous catalysts for desulfurization of diesel
... Through the past of more than two decades, POMs, especially heteropolyanions, have received great attention in the area of catalysis due to their unique molecular properties. POM chemical properties such as acid/base ...
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Study of catalysts for the hydrodeoxygenation reaction of phenol
... ceria–zirconia catalysts without fully reduced metal particles are active for the studied reaction and phenol and catechol are formed as the primary ...the synthesis of the catalysts and results in ...
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MATERIALS AND METHODS Catalysts preparation
... of catalysts closely related with the preparation conditions, such as calcinations ...hydrothermal synthesis method, and the influence of calcination temperature on the microstructures and selective ...
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Heterogeneous catalysts for biodiesel production.
... HETEROGENEOUS CATALYSTS FOR BIODIESEL ...heterogeneous catalysts that would be eficient and highly amenable to ...properties, synthesis and performance of compounds that are catalytic active in both ...
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