Sulphur poisoning of nickel catalysts in catalytic hot gas cleaning conditions of biomass gasification

Jouko Hepola, Pekka Simell, Esa Kurkela, Pekka Ståhlberg

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

    13 Citations (Scopus)

    Abstract

    Biomass-derived gasification gas contains tar that can plug the particulate filters, and ammonia that forms nitrogen oxides when burned. The use of a catalytic gas purification unit before particulate filters to decompose tar and ammonia is a promising method to solve these problems.

    Sulphur poisoning studies of nickel catalyst were performed in fixed-bed reactors at 800-950°C under 1-20 bar pressure with real and simulated gasification gas mixtures containing various amounts of H2S. The results indicated that the operation temperature had a great influence on the poisoning effect of sulphur. The higher the temperature the more sulphur the gas may contain without Catalyst Deactivation. The ammonia-decomposing activity declined due to sulphur more than the tar-decomposing activity. The catalyst was regenerated by removing H2S from the gas and the regeneration was enhanced by increasing the steam content of the gas.
    Original languageEnglish
    Title of host publicationCatalyst Deactivation 1994
    Subtitle of host publicationProceedings of the 6th International Symposium
    EditorsB. Delmon, G.F. Froment
    Place of PublicationAmsterdam
    PublisherElsevier
    Pages499-506
    ISBN (Print)978-0-444-81682-5
    DOIs
    Publication statusPublished - 1994
    MoE publication typeA4 Article in a conference publication
    Event6th International Symposium on Catalyst Deactivation - Ostend, Belgium
    Duration: 3 Oct 19945 Oct 1994

    Publication series

    SeriesStudies in Surface Science and Catalysis
    Volume88
    ISSN0167-2991

    Conference

    Conference6th International Symposium on Catalyst Deactivation
    Country/TerritoryBelgium
    CityOstend
    Period3/10/945/10/94

    Keywords

    • gasification

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