CAJ | 학술논문

变压吸附是利用分子筛筛分机理的特性来实现气体分离的。由于分子运动自由程的不同,气体分子通过分子筛的孔向孔内扩散时所受阻力不同,导致在孔内扩散速率不同,宏观上这种分离体现为气体被固定于分子筛的孔内部被＂吸附＂。实际操作时,不断采取＂加压吸附-减压脱附＂循环方式,因此被形象地称为＂变压吸附＂,其实质是基于分子筛孔本身的筛分机理,并非吸附机理。通过变压吸附的机理分析,我们确定了分子筛孔径的选择方法,同时分析了变压吸附过程的影响因素。
변압흡부시이용분자사사분궤리적특성래실현기체분리적。유우분자운동자유정적불동,기체분자통과분자사적공향공내확산시소수조력불동,도치재공내확산속솔불동,굉관상저충분리체현위기체피고정우분자사적공내부피＂흡부＂。실제조작시,불단채취＂가압흡부-감압탈부＂순배방식,인차피형상지칭위＂변압흡부＂,기실질시기우분자사공본신적사분궤리,병비흡부궤리。통과변압흡부적궤리분석,아문학정료분자사공경적선택방법,동시분석료변압흡부과정적영향인소。
Pressure Swing Adsorption（PSA）is a gas separation process of using micro porous screening mechanism of molecular sieve. As the free path of molecular motion is different, the pore diffusion resist- ance of gas molecules through the zeolite pore is different, resulting in the pore diffusion rate different. In this paper, the essence of PSA separation mechanism is analyzed. Then a method of determining pore size of molecular sieve is given. And the factors of effecting on PSA process are discussed.