Abstract
Interfacial area in cocurrent gas-liquid downflow through packed beds is correlated taking into consideration the physical properties of the fluids and the power dissipation in the system. The correlation is tested with the experimental data covering a wide range in system variables including low and high porosity packings, the flow rates of the phases and their physical properties.
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Abbreviations
- a m2/m3 :
-
effective interfacial area
- a t m2/m3 :
-
specific area of packing
- D m:
-
column diameter
- d m:
-
equivalent diameter of packing
- d p m:
-
nominal packing size
- f :
-
friction factor
- G kg/(m2s):
-
gas mass flow rate
- g m/s2 :
-
acceleration due to gravity
- L kg/(m2s):
-
liquid mass flow rate
- Mo :
-
Morton number
- P N/m3 :
-
pressure drop per unit bed height
- Re :
-
Reynolds number
- u m/s:
-
velocity of phase
- α :
-
ad p/(1−β)
- β :
-
total liquid holdup
- δ mH2O/m:
-
frictional pressure drop
- ε :
-
bed porosity
- η :
-
(1−1)2/ε3
- μ kg/(ms):
-
viscosity
- ρ kg/m3 :
-
density
- σ N/m:
-
surface tension
- σ :
-
RMS deviation
- φ :
-
shape factor
- g :
-
gas
- l :
-
liquid
- lg :
-
two phase
- w :
-
water
- cal:
-
calculated
- cat:
-
catalyst
- Cer:
-
ceramic
- CHA:
-
cyclohexylamine
- DEA:
-
diethanolamine
- ETG:
-
ethyleneglycol
- ETH:
-
ethanol
- exp:
-
experimental
- GB:
-
glass beads
- IS:
-
Intalox saddles
- MEA:
-
monoethanolamine
- NaOH:
-
sodium hydroxide
- PP:
-
polypropylene
- PR:
-
Pall rings
- RR:
-
Raschig rings
- Sph:
-
spheres
- TOL:
-
toluene
References
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Venkata Ratnam, G.S., Narasaiah, D.V. & Varma, Y.B.G. A correlation for interfacial area in co-current gas-liquid downflow through packed beds. Bioprocess Engineering 10, 53–59 (1994). https://doi.org/10.1007/BF00393387
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DOI: https://doi.org/10.1007/BF00393387