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)


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
ISBN (Print)978-0-444-81682-5
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


Conference6th International Symposium on Catalyst Deactivation


  • gasification

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