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Insights into Redox Dynamics of Vanadium Species Impregnated in Layered Siliceous Zeolitic Structures during Methanol Oxidation Reactions
(2020-01-08)
Supported transition metal catalysts have been extensively applied to oxidative and reductive processes. The understanding of surface speciation and active site-support interactions in these materials play a substantial ...
Mesoporous Silicates with Spherical Morphology Modified with Vanadium Highly Active in Oxidation of Cyclohexene with H2O2
(Springer/plenum Publishers, 2011-02)
Vanadium-containing mesoporous molecular sieves have been prepared by hydrothermal treatment at 373 K. These materials showed spherical morphology with a narrow particle size distribution between 2 and 4 lm. The techniques ...
Studies on dispersion and reactivity of vanadium oxides deposited on lamellar ferrierite zeolites for condensation of glycerol into bulky products
(2018-10-01)
The acetalization of acetone with glycerol was investigated using vanadium-impregnated catalysts. The siliceous supports FER, a purely microporous material, and ITQ-6, a micro/mesoporous material, were obtained from a ...
Sol-gel synthesis of V2O5-SiO2 catalyst in the oxidative dehydrogenation of n-butane
(Elsevier Science, 2006-09)
The sol-gel method was used to prepare V-SiO2 catalyst by hydrolysis of vanadium acetylacetonate and silicon alkoxide. Structural changes in the vanadium species upon heat treatment at various temperatures were studied by ...
Nature of active vanadium nanospecies in MCM-41 type catalysts for olefins oxidation
(Elsevier Science Sa, 2016-03)
A multi-technique physicochemical investigation including UV–Vis-DRS, Raman spectroscopy, XPS, ESR and FTIRS with pyridine adsorption was performed to analyze the nature of different vanadium nanospecies present on MCM-41 ...
Evaluation of Decomposition Procedure to Determine Ba, Co, Cr, Cu, Ni, Mn, V, and Zn Total Content in Soil Samples
(Taylor & Francis Inc, 2014-10-28)
Different procedures have been proposed to decompose soil samples. Most of them regard determination with fertility aims. In this case, the contents available to the plants are considered. On the other hand, there are ...
Sínteses e caracterização de novos catalisadores zeolíticos e sua como suportes inorgânicos para imobilização de lipase produzida por Rhizomucor miehei e seu estudo catalítico na reação de transesterificação do óleo de soja para produção de biodiesel
(Universidade Estadual Paulista (Unesp), 2010-11-08)
Os principais objetivos do presente trabalho de pesquisa são a síntese de novos catalisadores zeolíticos, a avaliação de seus usos como possíveis matrizes para imobilização enzimática, e o uso desse complexo zeólita/enzima ...
Evaluation of Decomposition Procedure to Determine Ba, Co, Cr, Cu, Ni, Mn, V, and Zn Total Content in Soil Samples
(Taylor & Francis Inc, 2015)
Selective oxidation of ethanol on V-MCM-41 catalysts
(Elsevier Science, 2019-10-19)
Catalysts V-MCM-41 with different V contents (0.09-0.90 wt.%), synthesized by the template ion-exchange (TIE) method, have been investigated for acetaldehyde production by selective oxidation of ethanol, studying the effects ...