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Study on char fragmentation during biomass gasification in bubbling fluidized bed
Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för byggd miljö och energiteknik (BET). (Bioenergy Technology)
Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för byggd miljö och energiteknik (BET). (Bioenergy Technology)ORCID-id: 0000-0002-8086-1518
Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för byggd miljö och energiteknik (BET).
2015 (engelsk)Inngår i: 23rd European Biomass Conference and Exhibition, 1-4 June 2015, Vienna, Austria, ETA-Florence Renewable Energies , 2015, s. 652-655Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

In this work a bench scale bubbling fluidized bed gasifier was built to work with an aerosol sampling and measuring system in order to study char fragmentation phenomenon during biomass gasification process. Both barbeque char and wood pellets were gasified in CO2 (20 vol.%) -N2 mixture and steam (30 vol.%)-N2 mixture, respectively. An aerodynamic particle sizer (APS) was used to measure fragmented char particles during the whole gasification process. For the wood pellet gasification case, major fragmentation was observed during the devolatilization stage, which should be attributed to the combined effect of primary fragmentation and attrition. The aerodynamic diameter of those elutriable particles which can be measured by the current system was in the range of 0.5-8 µm. During the char gasification stage, a distinct mode of char fragments was produced in the size range of 1-7 µm in either case. The total mass concentration of elutriable particles gradually increased when gasification of char started, and then decreased while the reaction approached completion.

sted, utgiver, år, opplag, sider
ETA-Florence Renewable Energies , 2015. s. 652-655
Emneord [en]
biomass, gasification, char, fluidized bed, aerosol, fragmentation
HSV kategori
Forskningsprogram
Teknik, Bioenergiteknik/Energi- och Miljöteknik
Identifikatorer
URN: urn:nbn:se:lnu:diva-45714DOI: 10.5071/23rdEUBCE2015-2DO.5.2ISBN: 978-88-89407-516 (tryckt)OAI: oai:DiVA.org:lnu-45714DiVA, id: diva2:846479
Konferanse
23rd European Biomass Conference and Exhibition
Forskningsfinansiär
Swedish Energy AgencyTilgjengelig fra: 2015-08-17 Laget: 2015-08-17 Sist oppdatert: 2019-02-22bibliografisk kontrollert

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