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Ca-alginate 겔 입자가 첨가된 Airlift 반응기에서 산소의 물질전달에 관한 연구
Oxygen Transfer in the External-loop Airlift Reactors with Ca-alginate Gel Beads
HWAHAK KONGHAK, August 1993, 31(4), 395-402(8), NONE
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Abstract
Ca-alginate 겔 입자가 첨가된 외부순환식 airlift 반응기에서 실험적으로 기체 체류량과 물질전달 계수를 측정하였다. 총괄 기체 체류량과 액상 물질전달 계수는 기체유속이 증가함에 따라 증가하였으며, 입자농도가 증가함에 따라 조금 감소하였다. 기체 체류량과 물질전달 계수는 고체입자 크기에는 별 다른 영향을 받지 않았다. Higbie의 침투이론과 Kolmogoroff의 등방난류이론으로부터 물질전달에 대한 모델을 제안하였으며, 실험결과에 비교적 잘 맞았다.
To investigate the performance of external-loop airlift reactors, the gas holdup and the volumatric mass transfer coefficient were determined experimentally in an airlift reactor with Ca-alginate gel beads. The results show that the overall gas holdup and liquid-phase mass transfer coefficient increased with increasing gas velocity but slightly decreased with increasing particle concentration. The particle size had no clear effect on the variation of gas holdup or oxygen transfer. A mass transfer model was proposed based on Higbie's penetration theory and Kolmogoroff's isotropic turbulence theory, and it compared fairly with experimental data.
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