In this study $CO_2$-loaded absorbent was regenerated by reducing pressure in hydrophobic microporous polypropylene hollow fiber membrane. An aqueous solution of 2-amino-2-methyl-1-propanol(AMP) was used as a model solution of $CO_2$-loaded absorbent. The feed solution introduced into the lumen side of fibers and the shell side was evacuated.
Desorption experiments were carried out at various temperatures, pressures, concentrations of AMP solution and $CO_2$ loadings. The effects of these operating conditions on desorption rate were investigated. The rate of $CO_2$ desorption increased with increasing $CO_2$ loading, temperature, concentration of AMP solution and with decreasing operating pressure. These results were explained in terms of driving force and overall mass transfer coefficient.
본 연구에서 $CO_2$가 흡수된 흡수제를 미세다공질의 폴리프로필렌 중공사막을 이용하여 감압 재생하였다. 모델 흡수제로는 2-아미노-2-메틸-1-프로판올(AMP) 수용액이 사용되었다. 흡수제는 중공사막의 내부로 도입되었고 중공사막의 외부에 진공이 유지되었다. 여러 가지 온도, 압력, AMP 농도, $CO_2$ loading의 범위에서 탈거실험이 수행되었다. 이 조업조건들이 탈거속도에 미치는 영향을 고찰하였으며 온도가 증가할수록, 압력이 낮아질수록, AMP농도가 증가할수록, $CO_2$ loading이 증가할수록 탈거속도는 증가하였다. 이러한 경향성이 추진력과 총괄물질전달 계수로서 설명되었다.
