화학공학소재연구정보센터
Journal of Industrial and Engineering Chemistry, Vol.13, No.1, 71-78, January, 2007
Mass Transfer Characteristics of a High-voidage Rotating Packed Bed
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This study investigated the mass transfer of a rotating packed bed (RPB) equipped with a high-voidage packing for the stripping of oxygen from water and the absorption of carbon dioxide from gas. The overall volumetric mass transfer coefficients (KLa and KGa) were determined observed as a function of the rotor speed, gas flow rate, and liquid flow rate. For stripping of oxygen from water, KLa increased with the rotor speed and liquid flow rate, but was independent of the gas flow rate. For absorption of carbon dioxide from gas, KGa remained relatively constant when the rotor speed exceeded the critical rate. Also, KGa increased with the liquid flow rate and gas flow rate. The HTU values of ca. 1.9∼2.3 cm for the stripping of oxygen from water and ca. 1.9∼4.0 cm for the absorption of carbon dioxide from gas were obtained in a high-voidage RPB, suggesting that such a system could provide a more efficient mass transfer relative to that of a conventional packed bed. Furthermore, the HTU values of a high-voidage RPB were comparable to that of a low-voidage RPB, implying the high feasibility of applying a high-voidage RPB to gas-liquid separation processes.
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