Abstract
This work examined pressure drop and mass transfer of the cross-flow rotating packed bed (RPB) using absorption of carbon dioxide (CO 2) from gas. As to pressure drop, the gas flow rate was observed to be a more important factor than the rotor speed and the liquid flow rate due to less liquid holdup in the cross-flow RPB. The overall volumetric gas-phase mass transfer coefficients ( K G a) were determined as a function of the rotor speed, the gas flow rate and the liquid flow rate. The dependences of K G a on the gas flow rate and the liquid flow rate indicated that the resistance to mass transfer in the liquid phase for CO 2 absorption was higher than that in the gas phase in the cross-flow RPB. Moreover, the obtained results demonstrated that the K G a values of the cross-flow RPB were comparable to those of the countercurrent-flow RPB, suggesting a great potential of the cross-flow RPB applied to the removal of CO 2 from gaseous streams.
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