Isopropanol Decomposition
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Síntese e caracterização de catalisadores VOx/Nb2O5/Al2O3 para a reação de desidrogenação oxidativa de parafinas lineares / Synthesis and characterization of VOx/Nb2O5/Al2O3 catalysts for oxidative dehydrogenation reaction of linear paraffins
The use of niobium oxide as a promoter and as a support has been investigated in various catalyst applications, such as selective oxidation, hydrocarbonate conversion, polymerization, elimination of (NOx) pollutants, dehydrogenation, etc. It is known that adding niobium to γ-Al2O3 improves acidity, selectivity and thermal stability and consequently the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/03/2009
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2. Síntese, caracterização e avaliação catalítica de Vo x/Mg yAlo x na reação de decomposição do isopropanol
Vanadium oxide supported on hydrotalcite-type precursors was studied in the decomposition of isopropanol. Hydrotalcite-type compounds with different y = Mg+2/Al+3 ratios were synthesized by the method of coprecipitating nitrates of Mg+2 and Al+3 cations with K2CO3 as precipitant. The X-ray diffraction patterns of Al-rich hydrotalcite precursors showed the pr
Química Nova. Publicado em: 2008
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3. SÃntese, caracterizaÃÃo e aplicaÃÃo de catalisadores heterogÃneos para a produÃÃo de biocombustÃveis / Synthesis,characterization and applications of heterogeneos catalysers for the biodiesel productions
Biodiesel is industrially produced by homogeneous transesterification of vegetable oils in the presence of basic species. However, removal of the base after reaction is a major problem, since purification of the ester phase is needed. In this study, different heterogeneous catalysts, based on calcium oxide (4-20%) supported on mesoporous SBA- 15 silica, and
Publicado em: 2008
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4. Preparation, characterization and aplication of anodes of nominal composition Ti/RuyTi(1-y-x)SnxO2 in the degradation electrochemical of chlorophenols / Preparação, caracterização e aplicação de ânodos de composição nominal Ti/RuyTi(1-y-x)SnxO2 na degradação eletroquímica de clorofenóis
In this work oxides electrodes of nominal composition Ti/RuyTi(1-y-x)SnxO2 were prepared by thermal decomposition (400 °C) by three different routes: Traditional Method using inorganic precursors dissolved in either Isopropanol (MT/ISO) or a solution of HCl 1:1 (v/v) (MT/HCl) and the Polymeric Precursors Method (MPP).Oxides coatings were characterized by Sc
Publicado em: 2007
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5. Characterization and catalytic behavior of MoO3/V2O5/Nb2 O5 systems in isopropanol decomposition
The influence of molybdenum oxide as a promoter on the V2O5/Nb2O5 system was investigated. A series of MoO3/V2O5/Nb2 O5 catalysts, with MoO3 loading ranging from 1 to 3 wt% MoO3 and fixed V2O5 content (21 wt%), were prepared by impregnation of the Nb2O5 support with an aqueous solution of ammonium metavanadate and ammonium molybdate. The acid-base properties
Brazilian Journal of Chemical Engineering. Publicado em: 2006-12
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6. Vanadium oxides supported on hydrotalcite-type precursors: the effect of acid-base properties on the oxidation of isopropanol
Vanadium oxide supported on hydrotalcite-type precursors was studied in the oxidation of isopropanol. Hydrotalcites with different y = Mg/Al ratios were synthesized by the method of coprecipitation nitrates of Mg and Al cations with K2CO3 as precipitant. The decomposition of these hydrotalcite precursors at 450°C yielded homogeneous MgyAlOx mixed oxides tha
Brazilian Journal of Chemical Engineering. Publicado em: 2006-09
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7. Estudo da atividade do sistema binário RuO2-Ta2O5 preparado por dois métodos de decomposição térmica na oxidação do Etanol / Study of the activity of the binary RuO2-Ta2O5 system prepared for two methods of thermal decomposition in the oxidation of the Ethanol
Neste trabalho investigou-se a influência do método de preparação nas propriedades estruturais e eletrocatalíticas do sistema RuO2/Ta2O5. Durante a investigação sistemática, as propriedades mecânicas e morfológicas dos eletrodos foram determinadas usando ânodos de composição nominal Ti/RuO2-Ta2O5 (Ru:Ta - 10 % - 90 % Ru variando em passos de 10
Publicado em: 2006
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8. Ethanol Electrooxidation with dimensionally stable anodes, DSA®, in NaCl medium / Eletrooxidação do etanol na presença de cloreto de sódio em eletrodos de óxidos de rutênio e irídio
In this work, it was investigated the electrocatalytic properties of oxides electrodes denominated dimensionally stable anodes, DSA®, in NaCl medium, applying them for ethanol oxidation. For this propose, many experimental parameters nave been investigated: the modulator oxide, changes in the preparation method of the electrode and pH changes of the solutio
Publicado em: 2005
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9. On the acidity and/or basicity of USY zeolites after basic and acid treatment
The isopropanol decomposition reaction was used to evaluate the catalytic activity of ultrastable (USY) zeolites with different degrees of dealumination, treated in strongly alkaline medium at various temperatures and contact times. This treatment resulted in the reinsertion of non-framework aluminium, a result of the ultrastabilization process. The samples
Brazilian Journal of Chemical Engineering. Publicado em: 2000-03
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10. Spectrofluorescent detection of in vivo red cell lipid peroxidation in patients treated with diaminodiphenylsulfone.
In the absence of vitamin E deficiency, red cell lipid peroxidation has not been clearly demonstrated in freshly drawn blood obtained from patients with various hemolytic anemias despite indirect evidence that oxidative decomposition of cell membrane unsaturated fatty acids occurs in these particular hemolytic states. Recent studies have indicated that malon