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    Study of the impact of porosity on coking sensor performance, A

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    REMRSEC-REU-2013-Poster-GARBIS ...
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    A study of the impact of porosity ...
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    Author
    Garbiso, Markus A.
    Wheeler, Jeffey L.
    Porter, Jason M.
    Date
    2013-08
    Keywords
    REMRSEC
    
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    URI
    https://hdl.handle.net/11124/325; http://dx.doi.org/10.25676/11124/325
    Abstract
    Fuel reforming systems transform hydrocarbon fuels (e.g. gasoline and methane) into synthesis gas (CO and O2). One problem in fuel reforming systems is if the concentration of carbon is too high, solid carbon starts to coat (coking) and damage the catalyst. A solution to prevent coking is a Wheatstone bridge circuit printed onto a ceramic wafer. When coke starts to deposit on Ni/YSZ, a measurable change in voltage occurs. When coking starts to form on a nickel catalyst, carbon nanofibers start to bridge nickel particles. The sensor is tested in an environmental cell with a methane and carbon dioxide atmosphere. Increasing the porosity of the sensor catalyst caused: monotonic sensor response, improved repeatability, and slower sensor response. Future work might be to investigate why nanofibers didn't form, but still worked.
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