Performance of superheater materials in simulated oxy-fuel combustion conditions at 650°C

Dorota Bankiewicz, Satu Tuurna, Patrik Yrjas, Pekka Pohjanne

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    1 Citation (Scopus)

    Abstract

    The corrosion performance of three different superheater austenitic steels (TP347HFG, HR3C and Sanicro 25) has been determined in laboratory tests under simulated oxy-fuel conditions (60 CO2 - 4 O2 - bal N2/Ar vol%) with three levels of H2O (0, 10 and 30 vol%), with and without a synthetic carbonate based deposit (85 CaCO3 - 15 CaSO4 wt%) at 650ºC for 168, 500 and 1000 hours. The results obtained from oxy-fuel conditions are compared with corresponding tests simulating conventional air-combustion and co-combustion in air (with and without the 85CaO-14CaSO4-1KCl synthetic deposit). The results from the 168 h tests in a moist and a high CO2 atmosphere showed clear corrosion of TP347HFG. In addition, carburisation was observed already in the 168 h tests with the CaCO3-CaSO4 deposits. The HR3C and Sanicro 25 performed better than TP347HFG. However, growing oxide nodules could be observed already after 168 h in some cases with HR3C and Sanicro 25. A clear oxide layer was observed on all materials after 168 h exposures in air, while oxy-fuel conditions with water vapor caused significant corrosion only to the TP347HFG.
    Original languageEnglish
    Title of host publicationEuropean Corrosion Congress, EUROCORR 2011
    Place of PublicationStockholm
    PublisherEuropean Federation of Corrosion EFC
    Pages1052-1061
    Volume2
    ISBN (Print)978-1-61839-412-5
    Publication statusPublished - 2011
    MoE publication typeA4 Article in a conference publication
    EventEuropean Corrosion Congress, EUROCORR 2011 - Stockholm, Sweden
    Duration: 4 Sep 20118 Sep 2011

    Conference

    ConferenceEuropean Corrosion Congress, EUROCORR 2011
    Abbreviated titleEUROCORR 2011
    CountrySweden
    CityStockholm
    Period4/09/118/09/11

    Keywords

    • material performance
    • oxyfuel combustion

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