Proton exchange membrane fuel cells (PEMFC) have the potential to meet the requirements for automotive applications due to their high power density and low operating temperature. On-board fuel processors will require a CO clean-up train to reduce the concentration to permissible levels for the fuel cell, usually below 10 ppm. Towards this goal, a highly active and selective reactor needs to be developed for the preferential oxidation of CO (PROX or SOX). The durability of the PROX catalyst has been tested for 500 hours to allow reasonable extrapolation of long term (5000 hr) operation and to investigate possible deactivation mechanisms. No decrease in the catalyst activity in terms of CO/CO2 conversion and selectivity was observed after 510 hours of testing. Results from these reactors demonstrate that the performance of the short contact time based Microlith catalytic reactors is beneficial for PROX reactor integrated within a fuel reforming system and clearly exceeds DOE (Department of Energy) size, volume and transient response targets with the potential of meeting startup and durability targets.


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    Title :

    Compact, lightweight preferential CO oxidation (PROX) reactor development and design for PEM automotive fuel cell applications


    Additional title:

    Entwicklung eines kompakten, leichten Reaktors (PROX) für die selektive CO-Oxidation und Design für Protonenaustauschmembran-Brennstoffzellen in Kraftfahrzeugen


    Contributors:


    Publication date :

    2003


    Size :

    17 Seiten, 8 Bilder, 3 Tabellen, 18 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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