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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received March 16, 2016
Accepted April 1, 2016

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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전해질용액 기포탑에서 기포특성

Bubble Properties in Bubble Columns with Electrolyte Solutions

유동준 임대호 전종설 양시우 강용^†

D. J. Yoo D. H. Lim J. S. Jeon S. W. Yang Y. Kang^†

충남대학교 응용화학공학과, 34134 대전시 유성구 대학로 99

Department of Chemical Engineering & Applied Chemistry, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea

Korean Chemical Engineering Research, August 2016, 54(4), 543-547(5), 10.9713/kcer.2016.54.4.543 Epub 2 August 2016

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Abstract

직경 0.152 m이고 높이 2.5 m인 전해질용액 기포탑에서 기포의 크기(chord length)와 상승속도 등 기포의 물성에 대해 고찰하였다. 기포의 크기와 상승속도는 이중저항탐침법을 사용하여 측정하였다. 기체와 액체의 유속 그리고 액상의 이온강도가 기포의 크기와 상승속도에 미치는 영향을 결정하였다. 기포의 크기는 기체의 유속이 증가함에 따라 증가하였으나 액체의 유속과 액상의 이온강도가 증가함에 따라서는 감소하였다. 기포의 상승속도는 기체의 유속이 증가함에 따라 증가하고 액상의 이온강도가 증가함에 따라 감소하였으나 액체유속의 변화에 따라서는 약한 최대값을 나타내었다. 기포의 크기와 상승속도는 운전변수들의 상관식으로 잘 나타낼 수 있었다.

Bubble prope rties such as size (chord length) and rising velocity were investigated in a bubble column with electrolyte solutions, of which diameter was 0.152m and 2.5m in height, respectively. The size and rising velocity of bubbles were measured by using the dual electrical resistivity probe method. Effects of gas and liquid velocities and ionic strength of liquid phase on the size and rising velocity of bubbles were determined. The bubble size increased with increasing gas velocity but decreased with increasing liquid velocity or ionic strength of liquid phase. The rising velocity of bubbles increased with increasing gas velocity and decreased with increasing ionic strength of liquid phase, however, it showed a slight maximum value with varying liquid velocity. The size and rising velocity of bubbles were well correlated with operating variables.

Keywords

Bubble column Electrolyte solution Ionic strength Bubble size Rising velocity

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