Removal of ozone from air by absorption in a rotating packed bed

This work investigated the feasibility of ozone (O(3)) absorption by H(2)O(2) solution in a rotating packed bed (RPB). The overall volumetric gas-phase mass transfer coefficients (K(G)a) were determined as functions of pH of H(2)O(2) solution, O(3) concentration, H(2)O(2) concentration, RPB speed, gas flow rate, liquid flow rate, and RPB type. The K(G)a values were highly dependent on the pH of H(2)O(2) solution. Also, the K(G)a values increased with O(3) concentration and H(2)O(2) concentration. As expected, the RPB speed positively affected the K(G)a values for all RPBs. Furthermore, the obtained results indicated that the K(G)a values increased as the inner radius of the bed was increased and the outer radius of the bed was decreased. Moreover, the K(G)a values increased with an increasing liquid flow rate and an increasing gas flow rate for all RPBs. 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 gas-phase for O(3) absorption was higher than that in the liquid phase in the RPB. (C) 2010 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.