In order to predict the performance of a packed column and the effect of the shape of various packing materials on the performance, a reaction system, where carbon dioxide is absorbed chemically into the $K_2CO_3-KHCO_3$ buffer solution containing NaOCl as catalyst, was employed for the study.
In this experiment, $\frac{1}{4}^{11}$, $\frac{3}{8}^{11}$, $\frac{1}{2}^{11}$ -half Raschig ring and -half square made of polypropylene were used as packing materials and counter current flow system was adopted to contact the gas with the liquid.
$k_L$ a and $k_L$ a were determined from experimental data by Danckwerts - Plot method.
The empirical and semi-empirical equations for the fractional rate of surface renewal, height of transfer unit and effective mass transfer area were obtained as :
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Where $^jp$ is defined as
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These equations were examined with the data from other investigators as well as this work and found good agreements between them.
충진탑 내의 performance 와 shape에 대한 영향을 규명하기 위하여 $K_2CO_3-KHCO_3$ buffer solution 에 NaOCl 을 촉매로 사용하여 $CO_2$ 를 흡수시키는 pseudo-1st order reaction이 이용되었다.
실험에 사용된 충진물로는 poly propylene 으로 제작된 1/4", 3/8", 1/2" 의 half Raschig ring과 half square가 이용되었으며 gas와 liquid를 counter-current flow로 접촉시키는 방법이 채택되었다.
Liquid film mass transfer coefficient, $k_L$, 와 effective mass transfer area, a, 및 volumetric mass transfer coefficient, $k_La$를 구하기 위하여 Danckwerts-plot method를 이용 했으며, surface renewal rate, S,와 height of transfer unit $H_L$, 및 effective mass transfer area, a,에 대하여 아래와 같은 empirical 및 semi-empirical equation을 얻었다.
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여기서 $J_p$는 아래와 같이 정의된 factor 이다.
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위의 식들은 다른 문헌의 data들과 비교 검토되었고 비교적 잘 일치 됨을 알 수 있었다.
