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

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

25/03/2009

RESUMO

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 catalyst activity of these materials. The catalyst activity of systems containing supported niobium is due to the different redox species of niobium oxide present on the solid surface. This study aims to evaluate the influence of the niobium and vanadium content in the V2O5/Nb2O5-Al2O3 catalyst system in the propane oxidative dehydrogenation reaction. Aiming the target of this study, the following characterization techniques were used: N2 volumetry (specific area and pore volume), temperature-programmed reduction, X-ray diffractometry (DRX), and Raman spectroscopy. The acid-base properties of the supports and catalysts were studied through isopropanol decomposition reaction.

ASSUNTO(S)

catalisadores v2o5/nb2o5-al2o3 decomposição do isopropanol desidrogenação oxidativa do propano drx drx espectroscopia raman isopropanol decomposition propane oxidative dehydrogenation raman spectroscopy rtp rtp v2o5/nb2o5-al2o3 catalysts

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