Oxygen transfer in an airlift reactor with multiple net draft tubes |
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Authors: | W -T Wu D -Y Hsiun |
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Institution: | (1) Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan, R.O.C. |
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Abstract: | A pilot scale airlift reactor with multiple net draft tubes was developed to improve oxygen transfer in the reactor. The reactor was 0.29 m in diameter and 2 m height. A steadystate sulfite oxidation method was applied to determine an overall volumetric mass transfer coefficient. Oxygen transfer of the proposed airlift reactor can be 60–100% higher than that of bubble columns under the same operating conditions.List of Symbols
C
* mol·dm–3
saturated concentration of dissolved oxygen
-
C
L
mol·dm–3
bulk concentration of dissolved oxygen
-
G mol/min
nitrogen flow rate
-
k
L
a hr–1
the volumetric gas-liquid mass transfer coefficient
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Mo
2
g/mol
molecular weight of oxygen
- OTR g/min
the oxygen transfer rate
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U
g
cm/s
superficial air velocity
-
V
L
dm3
volume of the liquid phase
- in
oxygen mole ratio in the inlet gas
- out
oxygen mole ratio in the outlet gas |
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Keywords: | |
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