An Improved CO2 Separation and Purification System Based on Cryogenic Separation and Distillation Theory

In this study, an improved CO2 separation and purification system is proposed based on in-depth analyses of cryogenic separation and distillation theory as well as the phase transition characteristics of gas mixtures containing CO2. Multi-stage compression, refrigeration, and separation are adopted...

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Main Authors: Gang Xu, Feifei Liang, Yongping Yang, Yue Hu, Kai Zhang, Wenyi Liu
Format: Article
Language:English
Published: MDPI AG 2014-05-01
Series:Energies
Subjects:
Online Access:http://www.mdpi.com/1996-1073/7/5/3484
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author Gang Xu
Feifei Liang
Yongping Yang
Yue Hu
Kai Zhang
Wenyi Liu
author_facet Gang Xu
Feifei Liang
Yongping Yang
Yue Hu
Kai Zhang
Wenyi Liu
author_sort Gang Xu
collection DOAJ
description In this study, an improved CO2 separation and purification system is proposed based on in-depth analyses of cryogenic separation and distillation theory as well as the phase transition characteristics of gas mixtures containing CO2. Multi-stage compression, refrigeration, and separation are adopted to separate the majority of the CO2 from the gas mixture with relatively low energy penalty and high purity. Subsequently, the separated crude liquid CO2 is distilled under high pressure and near ambient temperature conditions so that low energy penalty purification is achieved. Simulation results indicate that the specific energy consumption for CO2 capture is only 0.425 MJ/kgCO2 with 99.9% CO2 purity for the product. Techno-economic analysis shows that the total plant investment is relatively low. Given its technical maturity and great potential in large-scale production, compared to conventional MEA and SelexolTM absorption methods, the cost of CO2 capture of the proposed system is reduced by 57.2% and 45.9%, respectively. The result of this study can serve as a novel approach to recovering CO2 from high CO2 concentration gas mixtures.
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spelling doaj.art-f6a52dea53f447e5ae14808b4b0728de2022-12-22T02:57:28ZengMDPI AGEnergies1996-10732014-05-01753484350210.3390/en7053484en7053484An Improved CO2 Separation and Purification System Based on Cryogenic Separation and Distillation TheoryGang Xu0Feifei Liang1Yongping Yang2Yue Hu3Kai Zhang4Wenyi Liu5Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, School of Energy Power & Mechanical Engineering, North China Electric Power University, Beijing 102206, ChinaBeijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, School of Energy Power & Mechanical Engineering, North China Electric Power University, Beijing 102206, ChinaBeijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, School of Energy Power & Mechanical Engineering, North China Electric Power University, Beijing 102206, ChinaBeijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, School of Energy Power & Mechanical Engineering, North China Electric Power University, Beijing 102206, ChinaBeijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, School of Energy Power & Mechanical Engineering, North China Electric Power University, Beijing 102206, ChinaBeijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, School of Energy Power & Mechanical Engineering, North China Electric Power University, Beijing 102206, ChinaIn this study, an improved CO2 separation and purification system is proposed based on in-depth analyses of cryogenic separation and distillation theory as well as the phase transition characteristics of gas mixtures containing CO2. Multi-stage compression, refrigeration, and separation are adopted to separate the majority of the CO2 from the gas mixture with relatively low energy penalty and high purity. Subsequently, the separated crude liquid CO2 is distilled under high pressure and near ambient temperature conditions so that low energy penalty purification is achieved. Simulation results indicate that the specific energy consumption for CO2 capture is only 0.425 MJ/kgCO2 with 99.9% CO2 purity for the product. Techno-economic analysis shows that the total plant investment is relatively low. Given its technical maturity and great potential in large-scale production, compared to conventional MEA and SelexolTM absorption methods, the cost of CO2 capture of the proposed system is reduced by 57.2% and 45.9%, respectively. The result of this study can serve as a novel approach to recovering CO2 from high CO2 concentration gas mixtures.http://www.mdpi.com/1996-1073/7/5/3484CO2 recoverycryogenic separationconventional distillationtechno-economic analysisoxy-fuel combustion
spellingShingle Gang Xu
Feifei Liang
Yongping Yang
Yue Hu
Kai Zhang
Wenyi Liu
An Improved CO2 Separation and Purification System Based on Cryogenic Separation and Distillation Theory
Energies
CO2 recovery
cryogenic separation
conventional distillation
techno-economic analysis
oxy-fuel combustion
title An Improved CO2 Separation and Purification System Based on Cryogenic Separation and Distillation Theory
title_full An Improved CO2 Separation and Purification System Based on Cryogenic Separation and Distillation Theory
title_fullStr An Improved CO2 Separation and Purification System Based on Cryogenic Separation and Distillation Theory
title_full_unstemmed An Improved CO2 Separation and Purification System Based on Cryogenic Separation and Distillation Theory
title_short An Improved CO2 Separation and Purification System Based on Cryogenic Separation and Distillation Theory
title_sort improved co2 separation and purification system based on cryogenic separation and distillation theory
topic CO2 recovery
cryogenic separation
conventional distillation
techno-economic analysis
oxy-fuel combustion
url http://www.mdpi.com/1996-1073/7/5/3484
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