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  • 1
    Electronic Resource
    Electronic Resource
    The measurement of small amounts of coke by a sensitive TGA/FTIR technique (1998)
    Springer
    Catalysis letters 54 (1998), S. 5-8 
    Details
    ISSN: 1572-879X
    Keywords: carbon measurements ; coke ; FTIR ; TGA ; sulfated zirconia ; isomerization ; n‐butane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A useful, high‐sensitivity method for quantifying small amounts of coke on a catalyst was developed. A TGA/FTIR technique was used. Gases evolved from the sample during the thermogravimetric analysis were transferred from the furnace by a purge gas to the flow cell of an FTIR. The intensity of the infrared spectra of evolved gases, such as CO2, was measured as a function of time and displayed as a chromatogram. Integration of the chromatograms was compared to that of a standard sample and gave the amount of coke deposited on the catalyst. The carbon deposition on sulfated sol–gel zirconia in the isomerization of n‐butane at 200°C was measured. The carbon content was 0.013 wt% following deactivation for 15 min and 0.06 wt% after 180 min.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019055200591
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Activity and selectivity of a $${\text{Pd/}}\gamma {\text{ - Al}}_{\text{2}} {\text{O}}_{\text{3}}$$ catalytic membrane in the partial hydrogenation reactions of acetylene and 1,3-butadiene (1999)
    Springer
    Catalysis letters 57 (1999), S. 1-7 
    Details
    ISSN: 1572-879X
    Keywords: $${\text{Pd/}}\gamma {\text{ - Al}}_{\text{2}} {\text{O}}_{\text{3}}$$ ; inorganic membrane ; catalytic membrane reactor ; acetylene hydrogenation catalyst ; 1,3-butadiene hydrogenation catalyst
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A $${\text{Pd/}}\gamma {\text{ - Al}}_{\text{2}} {\text{O}}_{\text{3}}$$ membrane supported on a macroporous $$\alpha {\text{ - Al}}_{\text{2}} {\text{O}}_{\text{3}}$$ tube was prepared by sol–gel processing and used in the partial hydrogenation of acetylene and 1,3-butadiene. The average pore diameter of the $${\text{Pd/}}\gamma {\text{ - Al}}_{\text{2}} {\text{O}}_{\text{3}}$$ membrane was 3.6 nm. The gases were separated by Knudsen diffusion. The activity and selectivity of the $${\text{Pd/}}\gamma {\text{ - Al}}_{\text{2}} {\text{O}}_{\text{3}}$$ membrane was compared to that of $${\text{Pd/}}\gamma {\text{ - Al}}_{\text{2}} {\text{O}}_{\text{3}}$$ catalysts used in a conventional packed bed reactor. The highest selectivity to the partially hydrogenated products occurred when the reactant was premixed with H2 and was passed through the membrane wall.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019027027792
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Book Review (1999)
    Springer
    Journal of nanoparticle research 1 (1999), S. 515-515 
    Details
    ISSN: 1572-896X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics , Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010022818665
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    Paper (German National Licenses)
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