CO 2 Capture from Flue Gas of a Coal-Fired Power Plant Using Three-Bed PSA Process

Chu-Yun Cheng, Chia-Chen Kuo, Ming-Wei Yang, Zong-Yu Zhuang, Po-Wei Lin, Yi-Fang Chen, Hong-Sung Yang and Cheng-Tung Chou
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Chu-Yun Cheng: Department of Chemical and Materials Engineering, National Central University, Zhongli District, Taoyuan City 320, Taiwan
Chia-Chen Kuo: Department of Chemical and Materials Engineering, National Central University, Zhongli District, Taoyuan City 320, Taiwan
Ming-Wei Yang: Chemistry and Environment Laboratory, Taiwan Power Research Institute, Shulin District, New Taipei 23847, Taiwan
Zong-Yu Zhuang: Chemistry and Environment Laboratory, Taiwan Power Research Institute, Shulin District, New Taipei 23847, Taiwan
Po-Wei Lin: Department of Chemical and Materials Engineering, National Central University, Zhongli District, Taoyuan City 320, Taiwan
Yi-Fang Chen: Department of Chemical and Materials Engineering, National Central University, Zhongli District, Taoyuan City 320, Taiwan
Hong-Sung Yang: Department of Chemical and Materials Engineering, National Central University, Zhongli District, Taoyuan City 320, Taiwan
Cheng-Tung Chou: Department of Chemical and Materials Engineering, National Central University, Zhongli District, Taoyuan City 320, Taiwan

Energies, 2021, vol. 14, issue 12, 1-15

Abstract: The pressure swing adsorption (PSA) process was used to capture carbon dioxide (CO 2 ) from the flue gas of a coal-fired power plant to reduce CO 2 emissions. Herein, CO 2 was captured from flue gas using the PSA process for at least 85 vol% CO 2 purity and with the other exit stream from the process of more than 90 vol% N 2 purity. The extended Langmuir–Freundlich isotherm was used for calculating the equilibrium adsorption capacity, and the linear driving force model was used to describe the gas adsorption kinetics. We compared the results of breakthrough curves obtained through experiments and simulations to verify the accuracy of the mass transfer coefficient. The flue gas obtained after desulphurization and water removal (13.5 vol% CO 2 and 86.5 vol% N 2 ) from a subcritical 1-kW coal-fired power plant served as the feed for the designed three-bed, nine-step PSA process. To determine optimal operating conditions for the process, the central composite design (CCD) was used. After CCD analysis, optimal operating conditions with a feed pressure of 3.66 atm and a vacuum pressure of 0.05 atm were obtained to produce a bottom product with a CO 2 purity of 89.20 vol% and a recovery of 88.20%, and a top product with a N 2 purity of 98.49 vol% and a recovery of 93.56%. The mechanical energy consumption was estimated to be 1.17 GJ/t-CO 2 .

Keywords: pressure swing adsorption; flue gas; carbon capture; breakthrough curve; zeolite 13X (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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