Effective Enhancement of CO2 Mass Transfer in an Oscillatory Baffled Column: A Comparative Study

Omer I.  Farhan; Harith N.  Mohammed; Safaa M.R.  Ahmed

doi:10.52716/jprs.v14i4.783

Authors

Omer I. Farhan Petroleum and Gas Refining Engineering Department, College of Petroleum Processes Engineering, Tikrit University, Tikrit, Iraq.
Harith N. Mohammed Chemical Engineering Department, College of Engineering, Tikrit University, Tikrit, Iraq.
Safaa M.R. Ahmed Chemical Engineering Department, College of Engineering, Tikrit University, Tikrit, Iraq.

DOI:

https://doi.org/10.52716/jprs.v14i4.783

Abstract

CO₂-water mass transfer was studied in a multi-orifice oscillatory baffled column (OBC) operated in a semi-batch system (batch liquid phase and continuous gas phase). The effect of column configurations, oscillation conditions and gas flow rates, on CO₂ concentration ratio (C/C_o) in the gas phase, CO₂ concentration in water (g/l) and mass flux (g/m².min) were examined. The experiments were conducted over a wide range of oscillation condition expressed by modified oscillatory Reynolds number ( = 0-1450) and aeration rate, volume of gas per volume of liquid per minute, (vvm = 0-1). The inlet gas stream consists of 15% v/v CO₂ (the rest is N₂) used to simulate the emission of flue gas streams in industries. The results showed that the mass transfer enhancement increased with oscillation (frequency and amplitude) due to the improved mixing in the OBC. The OBC showed a higher enhancement in CO₂-water mass transfer than that obtained with a bubble column (BC) (smooth column without baffles and oscillation), and baffled column (without oscillation). The maximum enhancement of CO₂ mass flux achieved in the OBC was 10-fold over the BC at = 1449 and vvm=0.8.

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