Microfibers with high specific micro-surface can be knitted into two-dimensional structures with large internal porosity. Catalytically active metals can be deposited on the fibers with high dispersion by wet-impregnation, sol-gel or CVD, respectively. These microfiber knits may be used for exhaust gas treatment systems with a triple function: particle filtration, gas conversion and muffling. The total oxidation of propane on Pd and Pt coated fibers has been studied as a test reaction. Conversion temperature could be remarkably reduced compared to cellular structures. For a bimetallic (Pt-Pd) coating, the activity is independent of humidity or oxygen concentration. Thus a catalytic converter based on micro-fiber knits appears feasible. Its high mass and heat transfer prevent hot spots. And it functions as submicron filter for combustion aerosols. Integrated electric heating can also be provided in case of low gas temperatures. First tests on engines show promising results.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Microfiber Knits for Catalytic Converters


    Additional title:

    Sae Technical Papers


    Contributors:
    Buck, A. (author) / Mayer, A. (author) / Gmehling, B. (author) / Wintermantel, E. (author) / Emig, G. (author) / Hölemann, K (author) / Oser, M. (author) / Popovska, N. (author)

    Conference:

    International Congress & Exposition ; 1997



    Publication date :

    1997-02-24




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Microfiber knits for catalytic converters

    Mayer,A. / Buck,A. / Emig,G. et al. | Automotive engineering | 1997





    Carbon- and glas-fiber knits for thermoplastic composites in cars

    Mayer,J. / Ha,S.W. / Ruffieux,K. et al. | Automotive engineering | 1994