Optimal design of membrane separation process for capturing CO2 from flue gas of coal-fired power plant

被引：0

作者：

Li G. ^{[1
,2
]}

Wang K. ^{[1
,2
]}

Wang J. ^{[1
,2
]}

Meng W. ^{[1
,2
]}

Li J. ^{[1
,2
]}

Yang Y. ^{[1
,2
]}

Fan Z. ^{[1
,2
]}

Wang D. ^{[1
,2
]}

Zhou H. ^{[1
,2
]}

机构：

[1] School of Petrochemical Engineering, Lanzhou University of Technology, Gansu, Lanzhou

[2] Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Gansu, Lanzhou

来源：

Huagong Xuebao/CIESC Journal | 2022年 / 73卷 / 11期

关键词：

carbon reduction; CO[!sub]2[!/sub] capture; membrane separation; numerical simulation; optimal design;

D O I：

10.11949/0438-1157.20221035

中图分类号：

学科分类号：

摘要：

Global CO2 emissions continue to rise, leading to frequent climate problems. With the goal of “carbon peak and carbon neutralization”, it has become an urgent issue to capture CO2 from the flue gas of coal-fired power plants in an efficient and cost-effective way. The development of traditional chemical absorption method is seriously restricted by its high energy consumption, high cost and volatile solvent. The membrane carbon capture is considered as the most promising capture method because of its advantages such as simple operation, low energy consumption and small environmental pollution. Membrane-based carbon capture is considered as the most promising capture method because of its low capture cost and environment-friendly features. In this paper, a gas separation membrane model is established and solved with PI hollow fiber membrane as the separation membrane. And with the target of carbon dioxide capture in flue gas of coal-fired power plants, the membrane separation processes with different configurations of carbon dioxide capture are solved by multi-island genetic algorithm, and the key parameters (membrane area, operating pressure) in the separation process are optimized. The results show that in the two stage-one step membrane separation process, when the operating pressure of the first stage membrane and the second stage membrane are 5.8 bar and 7.1 bar, respectively, and the area of the first stage membrane and the second stage membrane is 448000 m2 and 180000 m2, the unit capture cost is 27.36 USD/t CO2. Compared with two stage-two step membrane separation and several other traditional CO2 capture methods (MEA method and phase change absorption method), the capture cost and energy consumption of CO2 by two stage-one step membrane separation is the lowest. This study will provide a basis for achieving low energy consumption and low cost for CO2 capture. © 2022 Chemical Industry Press. All rights reserved.

引用

页码：5065 / 5077

页数：12

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