Genetic-neural Network Based Optimization of Gas Separation Process Using Modified Polymeric Membrane

Document Type : Research Paper

Authors

1 Department of Chemical Engineering, Faculty of Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran

2 Petroleum Laboratory, School of Petroleum and Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

Abstract

Addition of nanoparticles to a polymeric matrix leads to enhance the performance of membrane gas separation. In this study, the aim is to find the optimum operative point of polymeric membrane modified by adding nanoparticles in gas separation. The assessed factors are type of nanoparticle, percentage of added nanoparticle, and cross membrane pressure.  Nanoparticles of AL2O3, ZnO, and TiO2 were used. Further, the ranges of nanoparticle concentration and operative cross membrane pressure were 2.5 to 15% and 2 to 25 bar respectively. To optimize a process, developing a robust model is necessary. Therefore, first, a powerful model based on artificial neural network was developed, which it was able to predict the values of permeability of oxygen, nitrogen, methane, and carbon dioxide. Neural network models were developed that had R2 greater than 0.9. Next, the optimum operative conditions for assessed gases were found using methodology based on genetic algorithm and considering four strategies. The results of optimization show that the maximum values of permeability for oxygen, nitrogen, methane, and carbon dioxide are 334.7, 779.9, 902.7, and 270.4 respectively.
 

Keywords


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