Catalyst Co Nb2o5
Mostrando 1-7 de 7 artigos, teses e dissertações.
-
1. Metal-Supported Niobium Catalysts Investigation for Conversion of Bio-Renewable Glycerol to Organic Compounds
The glycerol oxidative dehydration to organic compounds, especially acrolein and acrylic acid, was studied over vanadium, molybdenum, and cobalt oxides supported on niobium oxide and niobium phosphate catalysts. At 300 °C, the glycerol conversion was 100% over all catalysts tested, and acrolein was the main product observed, without significant deactivation
Journal of the Brazilian Chemical Society. Publicado em: 2022
-
2. Platinum and nioubium based catalysts for the anode of polymer electrolyte membrane fuel cells fed with low molecular weight alcohols / Catalisadores a base de platina e nióbio para o ânodo da célula a combustível de membrana trocadora de prótons alimentada com alcoóis de baixa massa molecular
In this work, the methanol and ethanol electrochemical oxidation reactions are studied on platinum (Pt) and niobium (Nb) catalysts supported on high surface area carbon. The selected materials were PtNb/C, Pt-Nb2O5(amorphous) /C e Pt-Nb2O5(crystalline) /C, using as reference for comparison purposes the commercial catalyst 20% Pt-C E-TEK. The catalysts were p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/01/2012
-
3. Avaliação da influencia do suporte na hidrogenação do adipato de dimetila por catalisadores RunSn / Evaluation of support in the hydrogenation of dimethyl adipate by RuSn catalysts
Este trabalho tem por objetivo avaliar a influência dos suportes La2O3, TiO2, SiO2 e Nb2O5 na hidrogenação do adipato de dimetila (ADM) para obtenção do 1,6-hexanodiol por catalisadores a base de rutênio na presença do promotor estanho. Reações de hidrogenação de ácidos e ésteres dicarboxílicos são tidas como complexas devido à possibilidade
Publicado em: 2009
-
4. Avaliação de catalisadores de Co/Nb2O5 na Síntese de Fischer-Tropsch em reator de leito de lama agitado
Motivado pela busca de fontes alternativas de produção de combustíveis, a presente dissertação teve o objetivo de estudar a atividade e a seletividade de catalisadores de cobalto suportados em nióbia (Co/Nb2O5) na reação de síntese de Fischer-Tropsch em reator leito de lama agitado. Foram avaliados o efeito do teor de cobalto no catalisador, o efeit
Publicado em: 2006
-
5. Estudo da Adição do Promotor Cu aos Catalisadores Pt/Al2O3 e Pt/Nb2O5 para a Oxidação Seletiva de CO / Study of the Addition of Cu Promoter to the Pt/Al2O3 and Pt/Nb2O5 catalysts for the Selective Oxidation of CO
The fuel cells are an alternative to generate energy without polluting the environment. They produce electric energy through the reaction of hydrogen with the oxygen from air. The product of the reaction is water. It is an interesting form of generation energy because its a clean technology. The hydrogen used as combustible for the fuel cells is proceeding f
Publicado em: 2005
-
6. 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
-
7. Study of catalytics Pt-In/Nb2O5 in the hydrocarbons conversion / Estudo de catalisadores Pt-In/Nb2O5 na conversão de hidrocarbonetos
Hydrocarbon dehydrogenation is an important industrial process, due to the high demand of unsatured hydrocarbons for industrial processes and products. Unsatured hydrocarbons are used in the manufacture of several products, such as detergents, high octanage gasoline, pharmaceutical products and synthetic rubber. The commercial catalysts employed in the hydro
Publicado em: 2003