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CO2 Separation by Using a Three-stage Membrane Process

Category: Control Techniques and Strategy

Volume: 9 | Issue: 12 | Pages: 2917-2928
DOI: 10.4209/aaqr.2019.10.0519
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Bingcheng Liu1, Xuan Yang 1, Ting Wang1, Mengmeng Zhang1, Pen-Chi Chiang2

  • 1 Qingdao University of Science and Technology, Qingdao 266061, China
  • 2 Carbon Cycle Research Center, National Taiwan University, Taipei 10672, Taiwan

Highlights

  • A new membrane process of CO2 capture from CO2-EOR extraction gas was displayed.
  • Matlab software used to simulate the new membrane process.
  • The important parameters of the system are obtained.

Abstract

This work proposed and optimized a three-stage membrane process for CO2 separation. The results of this study revealed that the membrane technology is a suitable process for the CO2 separation in a higher concentration. In addition, the MATLAB was used to simulate and obtain the optimal operational parameters for a three-stage membrane process. This work established a partial cycle and recovered the CO2 from the permeation side of second-stage membrane that enhance a higher purity CO2 gas stream. The results of this study indicated that when the CO2 concentration was higher than 50% and at a flow rate of 100000 Nm3 d–1, the CO2 separation could be achieved at the optimal operation condition. Under the conditions that the membrane areas were 2400, 3800, and 1800 m2 for the first-, second-, and third-stage membrane, respectively and the operational pressure at first- and third stage membrane were 3.0 and 2.5 MPa, respectively, the CO2 separation fraction was higher than 90% and CH4 loss rate was lower than 5%. The results of this study have a high potential for the practical application.

Keywords

Optimal design CO2-EOR extraction gas CO2 capture Multi-stage membrane separator


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