Deposits and emissions during the co-combustion of biodiesel residue with coal and biomass in a CFB pilot

Heidi Nevalainen, Timo Leino, Antti Tourunen, Matti Hiltunen, Edgardo Coda Zabetta

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

3 Citations (Scopus)

Abstract

The emissions, bed material behaviour and the formation of deposits in the co-combustion of granular rapeseed expeller - a residue from biodiesel production - both with bituminous coal and wood chips was studied at VTT’s 50kW CFB pilot reactor. The NO and SO2 emissions increased while the ratio of granular rapeseed expeller was increased in the fuel mixture. The deposition rate with fuel mixtures containing coal was lower than with wood chips-expeller mixtures. Potassium and phosphorous content in deposit increased consistently with the ratio of expeller in the biomass co-firing cases. A large ratio of expeller in the mixture with wood created slag on the riser over the secondary air feed. The expeller was found to have a clear agglomeration effect over the bed material when fired alone or co-fired with wood. On the contrary, co-combustion with coal resulted in no problems to the pilot furnace or its operation.
Original languageEnglish
Title of host publicationCirculating Fluidized Bed Technology IX
Subtitle of host publicationProceedings of the 9th International Conference on Circulating Fluidized Beds, CFB-9
EditorsJoachim Werther
Place of PublicationHamburg
Pages1-14
Publication statusPublished - 2008
MoE publication typeA4 Article in a conference publication
Event9th International Conference on Circulating Fluidized Beds, CFB9 - Hamburg, Germany
Duration: 13 May 200816 May 2008

Conference

Conference9th International Conference on Circulating Fluidized Beds, CFB9
Abbreviated titleCFB9
CountryGermany
CityHamburg
Period13/05/0816/05/08

Keywords

  • rapeseed expeller
  • CFB
  • co-combustion

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    Nevalainen, H., Leino, T., Tourunen, A., Hiltunen, M., & Coda Zabetta, E. (2008). Deposits and emissions during the co-combustion of biodiesel residue with coal and biomass in a CFB pilot. In J. Werther (Ed.), Circulating Fluidized Bed Technology IX: Proceedings of the 9th International Conference on Circulating Fluidized Beds, CFB-9 (pp. 1-14).