Defluidisation of fluidised beds during gasification of biomass
2011 (English)In: Biomass and Bioenergy, ISSN 0961-9534, Vol. 35, no SUPPL. 1, S63-S70 p.Article in journal (Refereed) Published
Defluidisation and agglomeration during fluidised bed gasification of biomass is analysed and discussed. It is argued that the agglomeration and defluidisation processes, in principle, closely resemble those that determine the behaviour of glass during glass processing. Crucial properties for working with glass melts are the viscosity, stickiness, surface tension, etc. It is, however, (very) difficult to theoretically quantify these properties through thermodynamics or other theoretical means. Hence it will be problematic to theoretically predict agglomeration and defluidisation. Models for predicting defluidisation must therefore probably be of an empirical nature. As a consequence of this, a number of fluidised bed gasification tests were empirically analysed with respect to defluidisation. In total 145 tests were evaluated; of these 51 defluidised or exhibited some kind of bed disturbance. A number of fuels and bed materials were included in the analysis using a multivariate statistical approach.Based on the analysis an empirical regression equation for predicting the defluidisation temperature during fluidised bed gasification is suggested.
Place, publisher, year, edition, pages
2011. Vol. 35, no SUPPL. 1, S63-S70 p.
Biomass, Defluidisation, Fluidised bed gasification, Multivariate analysis, Prediction
Energy Systems Chemical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-48152DOI: 10.1016/j.biombioe.2011.05.006ISI: 000297610300008ScopusID: 2-s2.0-80054839207OAI: oai:DiVA.org:kth-48152DiVA: diva2:456884
FunderEU, European Research Council, SES6-CT-2004-502587
QC 201111162011-11-162011-11-162012-01-02Bibliographically approved