Phase Ethanol Oxidation
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. A Novel Synthesis Route of Mesoporous γ-Alumina from Polyoxohydroxide Aluminum
Mesoporous gamma-aluminas (γ-Al2O3) were synthesized starting from an unusual precursor of polyoxohydroxide aluminum (POHA). This precursor was obtained from aluminum oxidation in alkaline water-ethanol solvent in the presence of d-glucose that induces the formation of a gel, which leads to the POAH powder after ethanolic treatment. Precipitated POHAs were
Mat. Res.. Publicado em: 22/01/2018
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2. EFEITOS ANTINOCICEPTIVO, ANTI-INFLAMATÓRIO E ANTIOXIDANTE DA ENTRECASCA DA MAYTENUS RIGIDA MART. (CELASTRACEAE). / ANTINOCICEPTIVE, ANTI-INFLAMMATORY, AND E ANTIOXIDANT EFFECTS OF THE INNER BARK OF MAYTENUS RIGIDA MART. (CELASTRACEAE).
Maytenus rigida Mart., populary known as bom-nome, cabelo de negro, casca grossa, and pau de colher is a species of Celastracae family that is widely distributed in the northeast. In folk medicine, it is indicated for the treatment of inflammation, pain, and infections such as in the urinary tract. This study aimed to contribute to the knowledge of the antin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/04/2010
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3. Comparative study of catalytic oxidation of ethanol to acetaldehyde using Fe(III) dispersed on Sb2O5 grafted on SiO2 and on untreated SiO2 surfaces
O Fe(III) foi suportado sobre o óxido de Sb(V) enxertado na superfície de sílica gel e diretamente sobre a superfície da sílica gel, respectivamente por um processo de troca iônica e de impregnação. A conversão catalítica do etanol a acetaldeído foi muito mais eficiente usando Fe/Sb/SiO2 do que Fe/SiO2, como catalisador. Esta maior eficiência do
Publicado em: 2010
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4. ANTINOCICEPTIVE, ANTI-INFLAMMATORY, AND E ANTIOXIDANT EFFECTS OF THE INNER BARK OF MAYTENUS RIGIDA MART. (CELASTRACEAE). / EFEITOS ANTINOCICEPTIVO, ANTI-INFLAMATÓRIO E ANTIOXIDANTE DA ENTRECASCA DA MAYTENUS RIGIDA MART. (CELASTRACEAE).
Maytenus rigida Mart., populary known as bom-nome, cabelo de negro, casca grossa, and pau de colher is a species of Celastracae family that is widely distributed in the northeast. In folk medicine, it is indicated for the treatment of inflammation, pain, and infections such as in the urinary tract. This study aimed to contribute to the knowledge of the antin
Publicado em: 2010
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5. Biorreciclagem de hexano e estudo de reações de óxido-redução usando plantas comestíveis / Biorecycling of hexane and study of oxido-reduction reactions using edible plants
The present work had as main goals the use of enzymatic reactions to degrade laboratory residues and to synthesize chiral alcohols. In the first part, it was carried out a screening of microorganisms and hydrolytic enzymes aiming the biorecycling of hexane from laboratory residues (a mixture of hexane-ethyl acetate). This misture is widely employed to purify
Publicado em: 2008
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6. Study of nickel catalysts supported on modified ZrO2 applied in reforming reactions / Estudo de catalisadores de níquel suportados em ZrO2 modificados aplicados em reações de reforma
Zirconium dioxide is a material with physics and chemical characteristics that can be applied in many fields, as academic as industrial. In the catalysis, the interest in systems based on zirconia (ZrO2) are growing- up quickly, as a catalyst as a support, considering that ZrO2 properties can be changed by the addition of different cations. The objective of
Publicado em: 2008
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7. Estudo do Catalisador (10%Ni-1%Cu) suportado na oxidação parcial indireta do Etanol
In the present work, the reaction of indirect partial oxidation of the ethanol for production of H2 for fuel cells was studied in catalysts 10%Ni-1%Cu (% mass) on different supports (Al2O3, SiO2-50, SiO2-200, Nb2O5 and CeZrO2). The catalysts were prepared by coimpregnation, leaving from aqueous solution of the respective nitrates, dry and calcined. The oxide
Publicado em: 2004
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8. Equilibrio de fases em sistemas compostos por triacilglicerois / acidos graxos / etanol hidratado
Vegetable oils contain some components that must be removed during the refining process such as: free fatty acids, phosphatides and metal traces. Free fatty acids are removed by chemical refining or physical refining. The first process is very versatile and applicable for ali raw materiais, but for high acidic oils, great loss of neutral oil may occur. In su
Publicado em: 2002
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9. Desacidificação de oleos vegetais por extração liquido-liquido : equilibrio de fases e simulação do processo
Vegetable oils can be deacidified by conventional process such as aIkaline and physical refining. AIkaline refining is applicable for all raw materiaIs, however, it can result in great losses of neutral oil. For high acidity oils, physical refining is aIso a possibility, but can cause undesirable alterations in color and reduction of stability to oxidation.
Publicado em: 2002
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10. Estudo do melhoramento do sabor de cacau (Theobroma cacao L.) atraves de ação enzimatica durante a fermentação
The fermentation of cocoa beans is an indispensable activity for the development of the precursors of chocolate flavor. During this stage the pulp that surrounds the beans is metabolized by microrganisms, producing, mainly, ethanol and acetic acid which are absorbed by the cotyledons resulting in the death of the seed, with several physical-chemical changes
Publicado em: 2001
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11. Estudo da transferencia de massa num reator trifasico de leito fluidizado circulante na oxidação do etanol e acido acetico com celulas imobilizadas de Acetobacter S.P
The objective of this work is the study of the kinetic and oxygen transfer in the oxidation of ethanol to acetic acid by immobilized cells, in a circulating three phase fluidized bed bioreactor. In this context experiences with Acetobacter cells, free and immobilized by entrapment in sodium aginate were done. In the first phase of the study, a strain at Acet
Publicado em: 1992
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12. Antimonio (V) disperso na superficie de silica gel : sintese, caracterização e propriedades
The antimony (V) oxide was obtained in highly dispersed form on a silica gel surface (Sb/SiO2), at a concentration of 0.65 atoms.nm, by grafting synthesis, and was reproducible for several preparations. After carrying out the XPS analysis, only Sb(V) ions in the Sb/SiO2 material were observed, which unlike the unsupported form, did not suffer any reduction b
Publicado em: 1992