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  • VOC combustion  (1)
  • vanadium surface species  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Development and application of perovskite‐based catalytic membrane reactors (1998)
    Springer
    Catalysis letters 54 (1998), S. 69-78 
    Details
    ISSN: 1572-879X
    Keywords: catalytic membranes ; perovskites ; VOC combustion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The preparation and characterization of catalytic membranes containing La‐based perovskites are reported. The membranes were prepared by in situ crystallization of different perovskites inside a porous α‐alumina matrix. Preponderance of the Knudsen‐diffusion regime during membrane operation was obtained with perovskite loads of 2 wt% and higher. The catalytic membranes obtained were used as combustors of VOCs (toluene and methyl ethyl ketone) contained in air streams, at concentrations between 875 and 3450 ppmV, and space velocities of up to 27200 h-1. The membranes were operated in the flow‐through mode, which resulted in total VOC combustion at moderate temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019003216521
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    Paper (German National Licenses)
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  • 2
    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
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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