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젖은 벽탑의 액-액 층류막에서의 물질전달
Mass Transfer in a Wetted-wall Column with Liquid-Liquid Laminar Flow
HWAHAK KONGHAK, December 1989, 27(6), 744-750(7), NONE
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Abstract
액-액계면을 통한 용질의 물질전달기구를 규명하기 위해서 말단효과를 보정한 젖은 벽탑을 사용하여 25℃에서 n-butanol, ethyl acetate 및 cyclohexanone이 물에 용해될 경우 분산성에서의 용질의 물질전달계수를 측정하여 이론치와 비교하였으며, I2가 용해도 n-hexane 및 cyclohexane 용액과 Na2SO4 수용액과의 접촉을 통하여 연속상에서의 I2의 물질전달계수를 측정하여 이론치와 비교하였다. 액-액계면을 통한 용질의 물질전달기구를 침투설에 의하여 설명하였으며, 용질의 전달속도와 농도의 관계를 나타내는 대류-확산방정식의 수치처리 방법을 실험변수와 물질전달계수가 포함된 무차원군의 극한치들로부터 이루어진 Beek-Bakker 모델로 해석할 수 있었다.
Film- and continuous-phase mass transfer in liquid-liquid system was studied using a cocurrent laminar wetted-wall column of a modified form. The film-phase mass transfer coefficients were measured by dissolution of n-butanol, ethyl acetate and cyclohexanone in water, and the continuous-phase mass transfer coefficients measured by the transfer of I2 disappeared by the instantaneous irreversible reaction with Na2S2O3 in the aqueous film-phase. These coefficients could be analyzed by the penetration theory and were in good agreement with Beek-Bakker model.