Modeling and Simulation of Gas Separation Membrane Processes Using Modified Operation Line Method

Document Type : Research Article

Authors

1 Faculty of Chemical Engineering, Urmia University of Technology, Urmia, I.R. IRAN

2 Department of Chemical Engineering, Urmia University, Faculty of Engineering, Urmia, I.R. IRAN

Abstract

In this work, the Modified Operation Line Method (MOLM) was used for modeling and simulation of the gas separation membrane process due to its simplicity and well compatibility with exact solution methods. This method reliability was verified by comparing the obtained results with the literature for both organic and inorganic membranes. Then, the verified model was applied to calculate the surface area of the membrane separation process, as a case study, for the separationof butane isomers produced in LPG unit of Tabriz refinery. The results showed that the MOLM method
is not efficient for countercurrent flow pattern. But, this method can predict the required membrane area for cocurrent flow pattern accurately. Modeling results showed that high purity products can't be obtained using a single stage membrane. For this purpose, a processes design was performed to achieve products with a purity higher than 98% of normal and isobutane produced in LPG unit of Tabriz refinery by multistage membrane cascade using MOLM method and required membrane area was calculated to equal to 2910 m2. Also, the effects of the key parameters such as selectivity and ratio of feed pressure to permeate pressure on the membrane surface area were evaluated. and ratio of feed pressure to permeate pressure on the membrane surface area were evaluated.

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Main Subjects

References

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