Dissolved hydrogen measurement with solid-state sensors in liquids using dynamic drift elimination techniques

V. Lakhotia, A. Nguyen Le, K. Imler, R. Sadeghian

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Specialized techniques such as Dissolved Gas Analysis (DGA) have historically been used to measure gas concentration and successfully indicate faults in equipment such as oil-filled transformers. A palladium based, solid state, on-line hydrogen sensor is presented that can operate immersed directly in various insulating fluids. Its performance is compared with manual sample extraction and offline analysis by laboratory gas chromatographs. Results of lab qualification as well as extended field testing have been utilized to develop algorithms that compensate for sensor drift, temperature-dependent gas solubility changes, and liquid type. The intrinsic sensor drift is eliminated using a reference cycle approach that does not require any external gas application or user intervention. Its efficacy has been tested in sensors operating in both the liquid and gas-phase and can eliminate cross-sensitivity. In particular, the use of palladium alloys for measuring H2 can be confounded by known interference gases and sensor poisons such as O2, CO, and H2S. This paper will highlight the ability of this technique to not only remove intrinsic sensor drift, but also eliminate cross-interference effects from gases such as CO, H2S, etc.

    Original languageEnglish
    Title of host publication58th Analysis Division Symposium 2013
    Subtitle of host publicationAnalytical Solutions in Paradise
    Pages147-159
    Number of pages13
    Publication statusPublished - 2013
    Event58th Analysis Division Symposium 2013: Analytical Solutions in Paradise - Galveston, TX, United States
    Duration: 2013 Apr 142013 Apr 18

    Publication series

    NameProceedings of the Annual ISA Analysis Division Symposium
    Volume494
    ISSN (Print)1050-6527

    Other

    Other58th Analysis Division Symposium 2013: Analytical Solutions in Paradise
    CountryUnited States
    CityGalveston, TX
    Period13/4/1413/4/18

    Keywords

    • Carbon monoxide
    • Dissolved gas analysis
    • Drift
    • Gas chromatography
    • Hydrogen
    • Palladium
    • Reference cycles
    • Sensor poisons
    • Sensors

    ASJC Scopus subject areas

    • Instrumentation

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