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Distribution of large biomass particles in a sand‐biomass fluidized bed: Experiments and modeling
Author(s) -
Fotovat Farzam,
Chaouki Jamal,
Bergthorson Jeffrey
Publication year - 2014
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.14337
Subject(s) - fluidization , biomass (ecology) , tracer , fluidized bed , pressure drop , particle (ecology) , volume (thermodynamics) , mixing (physics) , fraction (chemistry) , environmental science , mechanics , chemistry , geology , chromatography , thermodynamics , nuclear physics , physics , oceanography , organic chemistry , quantum mechanics
The axial distribution of large biomass particles in bubbling fluidized beds comprised of sand and biomass is investigated in this study. The global and local pressure drop profiles are analyzed in mixtures fluidized at superficial gas velocities ranging from 0.2 to 1 m/s. In addition, the radioactive particle tracking technique is used to track the trajectory of a tracer mimicking the behavior of biomass particles in systems consisting of 2, 8, and 16% of biomass mass ratio. The effects of superficial gas velocity and the mixture composition on the mixing/segregation of the bed components are explored by analyzing the circulatory motion of the active tracer. Contrary to low fluidization velocity (U = 0.36 m/s), biomass circulation and distribution are enhanced at U = 0.64 m/s with increasing the load of biomass particles. The axial profile of volume fraction of biomass along the bed is modeled on the basis of the experimental findings. © 2014 American Institute of Chemical Engineers AIChE J , 60: 869–880, 2014