Performance of a cross-flow rotating packed bed in removing carbon dioxide from gaseous streams by chemical absorption

This work considered the performance of four cross-flow rotating packed beds (RPBs) for removing carbon dioxide (CO₂) by chemical absorption with three absorbents. The removal efficiency of CO₂ in four cross-flow RPBs was determined at various operating variables, which were rotational speed, gas flow rate, and liquid flow rate. The experimental results demonstrated that the removal efficiency of CO₂ increased with an increasing rotational speed and an increasing liquid flow rate, but decreased with an increasing gas flow rate in each cross-flow RPB. Additionally, the axial height of the packed bed affected the dependences of the removal efficiency of CO₂ on the rotational speed, gas flow rate, and liquid flow rate. The obtained results revealed that increasing the axial height of the packed bed increased the removal efficiency of CO₂. Furthermore, the absorbent type gave different dependences of the removal efficiency of CO₂ on the axial height of the packed bed.