통합 VOCs 정제시스템을 구성하는 투과증발 및 증기투과 공정의 탈수 성능에 관한 연구

Abstract

An integrated VOCs purification system consisting of vapor permeation and pervaporation processes was proposed in this study. The performance evaluation of each process for dehydration of the IPA-water mixture was conducted experimentally and theoretically. Different types of hollow-fiber membranes were applied to each process, namely a NaA zeolite membrane for the pervaporation and a polyimide membrane for the vapor permeation. The two hollow-fiber modules were evaluated in different operating modes with a concurrent-flow: a lumen-side feed for vapor permeation and a shell-side feed for pervaporation. Parametric investigation was carried out to assess the effect of operating conditions on each performance. In addition, detailed theoretical models have been developed to predict the transmembrane flux in both dehydration processes. The model predictions were verified by comparing with measured data, where good agreement between the prediction results and experimental data was obtained.