Selectivities in methanol oxidation over silica supported molybdena
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چکیده
منابع مشابه
Partial Oxidation of Methanol over Highly Dispersed Vanadia Supported on Silica SBA-15
The partial oxidation of methanol to formaldehyde was studied over highly dispersed vanadia supported on mesoporous silica SBA-15 (VOx/SBA-15). VOx/SBA-15 catalysts were prepared by a novel grafting/ion-exchange method and characterized using UV-VISand Raman spectroscopy. The resulting surface vanadium oxide species (0 – 2.3 V/nm), grafted on the inner pores of the SBA-15 silica matrix, consist...
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We find that nearly monodisperse copper oxide nanoparticles prepared via the thermal decomposition of a Cu(I) precursor exhibit exceptional activity toward CO oxidation in CO/O2/N2 mixtures. Greater than 99.5% conversion of CO to CO2 could be achieved at temperatures less than 250 degrees C for over 12 h. In addition, the phase diagram and pathway for CO oxidation on Cu2O (100) is computed by a...
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A theoretical analysis was carried out of the mechanism and kinetics of methane oxidation to formaldehyde occurring on isolated molybdate species supported on silica. Both mono-oxo and di-oxo molybdate structures were used to represent the active centers. The energetics for each elementary reaction was determined from density functional theory calculations, and the entropy changes were determin...
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Vanadium supported on highly ordered nanoporous silica (VOx-LUS-1) was synthesized and characterized by XRD, Nitrogen adsorption‑desorption isotherms and UV-visible spectrophotometer. Direct oxidation of benzene to phenol in liquid phase by H2O2 peroxide were examined by using various solvents (methanol, acetone, acetic acid, acetonitryl). The maximum yield (25%) and selectivity (73%) of the ph...
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Metathesis of propene to ethene and 2-butenes was studied over a series of MoOx/SBA-15 catalysts (molybdenum oxide supported on mesoporous silica SBA-15; Mo loading 2.1~13.3 wt%, apparent Mo surface density 0.2~2.5 nm). The catalysts have been prepared by an ion exchange technique. Nitrogen adsorption, HMAS-NMR, Raman, and FTIR spectroscopies were applied to characterize the catalysts. Adsorpti...
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ژورنال
عنوان ژورنال: Catalysis Letters
سال: 1996
ISSN: 1011-372X,1572-879X
DOI: 10.1007/bf00806913