Abstract
The present study presents systematic experimental data on the fluidization of zeolite particles in water-solid fluidized beds. Four particle size groups, 90-180 μm, 180-250 μm, 250-315 μm and 315-500 μm and 22 different volumetric flow rates were used, corresponding to Rep of 0.012 to 1.452. All particle sizes showed smooth flow rate vs expanded bed height curves. As is proven, the Ergun equation is useful for determining the minimum fluidization velocity for the large particle sizes by using a fixed sphericity value of 0.354. For the fluidized bed regime (us>umf), the Ergun equation fails to represent the data as it results in fluctuating particle sphericity values, while the Richardson-Zaki model seems to correlate the data for the large particle sizes only. A new correlation is presented, connecting bed voidage to Rep for all particle sizes with an average relative error of 2.38±2.49% and the range is 0.02-9%.
| Original language | English |
|---|---|
| Article number | A126 |
| Journal | International Journal of Chemical Reactor Engineering |
| Volume | 8 |
| Publication status | Published - 2010 |
| Externally published | Yes |
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Keywords
- fluidized bed
- richardson-Zaki equation
- sphericity
- zeolites
ASJC Scopus subject areas
- Chemical Engineering(all)
Cite this
Hydrodynamic studies on zeolite fluidized beds. / Inglezakis, Vassilis J.; Stylianou, Marinos; Loizidou, Maria.
In: International Journal of Chemical Reactor Engineering, Vol. 8, A126, 2010.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hydrodynamic studies on zeolite fluidized beds
AU - Inglezakis, Vassilis J.
AU - Stylianou, Marinos
AU - Loizidou, Maria
PY - 2010
Y1 - 2010
N2 - The present study presents systematic experimental data on the fluidization of zeolite particles in water-solid fluidized beds. Four particle size groups, 90-180 μm, 180-250 μm, 250-315 μm and 315-500 μm and 22 different volumetric flow rates were used, corresponding to Rep of 0.012 to 1.452. All particle sizes showed smooth flow rate vs expanded bed height curves. As is proven, the Ergun equation is useful for determining the minimum fluidization velocity for the large particle sizes by using a fixed sphericity value of 0.354. For the fluidized bed regime (us>umf), the Ergun equation fails to represent the data as it results in fluctuating particle sphericity values, while the Richardson-Zaki model seems to correlate the data for the large particle sizes only. A new correlation is presented, connecting bed voidage to Rep for all particle sizes with an average relative error of 2.38±2.49% and the range is 0.02-9%.
AB - The present study presents systematic experimental data on the fluidization of zeolite particles in water-solid fluidized beds. Four particle size groups, 90-180 μm, 180-250 μm, 250-315 μm and 315-500 μm and 22 different volumetric flow rates were used, corresponding to Rep of 0.012 to 1.452. All particle sizes showed smooth flow rate vs expanded bed height curves. As is proven, the Ergun equation is useful for determining the minimum fluidization velocity for the large particle sizes by using a fixed sphericity value of 0.354. For the fluidized bed regime (us>umf), the Ergun equation fails to represent the data as it results in fluctuating particle sphericity values, while the Richardson-Zaki model seems to correlate the data for the large particle sizes only. A new correlation is presented, connecting bed voidage to Rep for all particle sizes with an average relative error of 2.38±2.49% and the range is 0.02-9%.
KW - fluidized bed
KW - richardson-Zaki equation
KW - sphericity
KW - zeolites
UR - http://www.scopus.com/inward/record.url?scp=77955402741&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77955402741&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:77955402741
VL - 8
JO - International Journal of Chemical Reactor Engineering
JF - International Journal of Chemical Reactor Engineering
SN - 1542-6580
M1 - A126
ER -