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  • 1
    Electronic Resource
    Electronic Resource
    Characterization of surface species on V/SiO2 and V,Na/SiO2 and their role in the partial oxidation of methane to formaldehyde (1996)
    Springer
    Catalysis letters 40 (1996), S. 9-16 
    Details
    ISSN: 1572-879X
    Keywords: vanadium surface species ; silica-supported catalysts ; methane partial oxidation ; sodium poison ; V=O sites
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Silica-supported vanadium (1–8 wt%) and vanadium (5 wt%)-sodium (0.4 wt%) catalysts have been characterized by laser Raman spectroscopy, temperature-programmed reduction, X-ray photoelectron spectroscopy, NO + NH3 rectangular pulses and oxygen chemisorption. The presence of different vanadium species was correlated with activity and selectivity during the methane partial oxidation reaction. The pre-impregnation of the silica support with sodium favors vanadium dispersion, but strongly diminishes V=O concentration due to the formation of orthovanadate-like compounds. As a result of these modifications, methane conversion is strongly inhibited while formaldehyde decomposition is favored.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00807449
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of NO and solids on the oxidation of methane to formaldehyde (1994)
    Springer
    Catalysis letters 29 (1994), S. 339-348 
    Details
    ISSN: 1572-879X
    Keywords: formaldehyde ; gas-phase reactions ; methane partial oxidation ; oxide catalysts ; nitric oxide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The selective oxidation of methane has been studied both in the presence and absence of solids (inert or catalysts) with and without NO added, at 1 bar of total pressure. NO enhances the yield to formaldehyde, while the solids favor its decomposition. These results, together with abundant literature data, show a maximum for formaldehyde yield of about 4.0%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00807113
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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