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Estimation of wood char size at the end of devolatilization in a bubbling fluidized bed combustor

M Sreekanth ; R Renu Kumar ; Ajit Kumar Kolar ; Bo Leckner (Institutionen för energi och miljö, Energiteknik)
Fuel Vol. 87 (2008), 15-16, p. 3393-3402.
[Artikel, refereegranskad vetenskaplig]

Two processes, namely shrinkage and primary fragmentation are known to be the major causes of size reduction of wood during its devolatilization in a fluidized bed combustor. A simple phenomenological model incorporating these effects to compute the average char size at the end of devolatilization is proposed. Experiments are conducted in a bubbling fluidized bed combustor using wood having three different shapes namely, cylinder, cuboid and sphere, to measure the average char size at the end of devolatilization. The model prediction of average char size agrees with the measured values within a deviation of 15%. An experimental correlation is derived to determine the number of fragments and is used to estimate the mean char size. © 2008 Elsevier Ltd. All rights reserved.

Nyckelord: Wood; Char size; Shrinkage; Primary fragmentation; Fluidized bed



Denna post skapades 2008-10-08. Senast ändrad 2016-08-15.
CPL Pubid: 74970

 

Institutioner (Chalmers)

Institutionen för energi och miljö, Energiteknik

Ämnesområden

Miljöteknik

Chalmers infrastruktur