Yeom Choongkyun, Kim Jiwon, Park Heeyoung, Lee Jiwoong, Park Seong Eun, Gu Boram
SepraTek Inc., 730 Gyejok-ro, Daedeok-gu, Daejeon 34396, Korea.
Envioneer Co., Ltd., 85 Hanbang-expo-ro, Jecheon 27116, Korea.
Membranes (Basel). 2022 Jan 28;12(2):158. doi: 10.3390/membranes12020158.
The purpose of this study is to establish a practical simulation model based on mass balance, mass transport equations and equilibrium equation between gas and liquid phases across a porous membrane in membrane contactor process in order to predict the separation behavior by the gassing process of gas mixture in membrane contactor. The established simulation model was verified by comparison between the simulated values and real process values in the separation of CH/CO mixture, showing an excellent agreement between them. The parameter R-value in the model, which is a kind of the permeability of permeant across porous membrane, has been determined by fitting a numerical solution of the model equation to the experimental data to obtain a practical value of the parameter. A parametric study on the gassing process of N/CO mixture in membrane contactor was made with the help of the practical simulation model to investigate the effects of operation parameters on separation performance and to characterize the separation behavior of membrane contactor process. A series of simulations of the separation of N/CO mixture in membrane contactor were conducted, and the optimization on the membrane process was discussed to maximize the separation performance in terms of N recovery percent in retentate and CO permeation rate. It was observed from the analysis of the result of the simulation that liquid flow rate has a negative effect on N recovery percent in retentate but a positive effect on the separation of CO, while R-value affects the separation performance in the other way. It is confirmed in this study that the developed simulation can be used as a tool to optimize the parameters, i.e., feed gas pressure, liquid flow rate and R-value to maximize the separation performance.
本研究的目的是基于质量平衡、传质方程以及膜接触器过程中多孔膜气液相间的平衡方程，建立一个实用的模拟模型，以预测膜接触器中混合气体通气过程的分离行为。通过比较模拟值与CH/CO混合物分离实际过程值，对所建立的模拟模型进行了验证，结果表明二者吻合度极高。模型中的参数R值，即透过物在多孔膜中的渗透率，通过将模型方程的数值解与实验数据拟合来确定该参数的实际值。借助该实用模拟模型，对膜接触器中N/CO混合物的通气过程进行了参数研究，以考察操作参数对分离性能的影响，并表征膜接触器过程的分离行为。对膜接触器中N/CO混合物的分离进行了一系列模拟，并讨论了膜过程的优化，以在截留物中N的回收率和CO渗透速率方面最大化分离性能。从模拟结果分析可知，液体流速对截留物中N的回收率有负面影响，但对CO的分离有正面影响，而R值对分离性能的影响则相反。本研究证实，所开发的模拟可作为一种工具，用于优化进料气体压力、液体流速和R值等参数，以最大化分离性能。
