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

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) Vol. 16; no. 1; pp. 140 - 146
• Main Authors: Lin, Chia-Chang, Chao, Cheng-Yu, Liu, Mei-Yun
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2010; 한국공업화학회
• Subjects: Absorption; High gravity; Mass transfer; Ozone; Rotating packing bed; 화학공학; Ozone; Absorption; High gravity; Rotating packing bed; Mass transfer
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2010.01.005

This work investigated the feasibility of ozone (O 3) absorption by H 2O 2 solution in a rotating packed bed (RPB). The overall volumetric gas-phase mass transfer coefficients ( K Ga) were determined as functions of pH of H 2O 2 solution, O 3 concentration, H 2O 2 concentration, RPB speed, gas flow rate, liquid flow rate, and RPB type. The K Ga values were highly dependent on the pH of H 2O 2 solution. Also, the K Ga values increased with O 3 concentration and H 2O 2 concentration. As expected, the RPB speed positively affected the K Ga values for all RPBs. Furthermore, the obtained results indicated that the K Ga values increased as the inner radius of the bed was increased and the outer radius of the bed was decreased. Moreover, the K Ga values increased with an increasing liquid flow rate and an increasing gas flow rate for all RPBs. The dependences of K Ga 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.