Supported oxorhenate catalysts prepared by thermal spreading of metal Re{sup 0} for methanol conversion to methylal

Journal Article · Sat Oct 15 00:00:00 EDT 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.08.002· OSTI ID:21580042

Secordel, Xavier; Yoboue, Anthony; Cristol, Sylvain; Lancelot, Christine; Capron, Mickael; Paul, Jean-Francois ^[1]; Berrier, Elise ^[1]

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1. Unite de Catalyse et de Chimie du Solide UMR CNRS 8181 Universite Lille 1 Sciences et Technologie, F-59655 Villeneuve d'Ascq Cedex (France)

TiO{sub 2}-anatase and SiO{sub 2} supported oxorhenate catalysts were prepared by an original and simple technique based on the oxidative dispersion of metallic rhenium under dry conditions. The dispersion process of the supported oxorhenate phase as a function of the rhenium coverage and the support properties are discussed on the base of in situ characterization. The structures of the as prepared catalysts were found to be comparable to those of materials prepared using the incipient wetness impregnation technique. The absence of water in the preparation technique has made it possible to highlight the role of the hydration level on the rhenium oxide volatilization. The as-prepared Re/TiO{sub 2} catalysts were found to be effective for the direct conversion of methanol to methylal. - Graphical Abstract: Evolution of the 900-1000 cm{sup -1} region of the Raman spectrum of a mixture of metal rhenium with anatase TiO{sub 2} K03 upon heating in pure O{sub 2}. Highlights: > Supported rhenium catalysts can be easily prepared from metal Re. > This dry process is mainly a CVD immediately followed by rhenium deposition. > Hydration of the oxorhenate phase is dependent on the support.

• OSTI ID: 21580042
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 10; Other Information: DOI: 10.1016/j.jssc.2011.08.002; PII: S0022-4596(11)00427-0; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CATALYSTS
CHEMICAL VAPOR DEPOSITION
EVAPORATION
HYDRATION
METHANOL
METHYLAL
MIXTURES
OXIDATION
RAMAN SPECTRA
RHENIUM
RHENIUM OXIDES
SILICA
SILICON OXIDES
TITANIUM OXIDES
ALCOHOLS
CHALCOGENIDES
CHEMICAL COATING
CHEMICAL REACTIONS
DEPOSITION
DISPERSIONS
ELEMENTS
ETHERS
HYDROXY COMPOUNDS
METALS
MINERALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
REFRACTORY METAL COMPOUNDS
REFRACTORY METALS
RHENIUM COMPOUNDS
SILICON COMPOUNDS
SOLVATION
SPECTRA
SURFACE COATING
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS