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Dynamic Simulation of the CO2 Cryogenic Separation Process.

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Title: Dynamic Simulation of the CO2 Cryogenic Separation Process.
Authors: Lin, Mingzhen1,2,3 (AUTHOR) linmz1221@126.com, Wang, Yingwei4 (AUTHOR), Fan, Wenbin1,2,3 (AUTHOR), Wang, Xiaoguang4 (AUTHOR), Chen, Hongfu4 (AUTHOR), Liu, Hegao4 (AUTHOR), Chen, Lintao1 (AUTHOR), Xu, Haoze1 (AUTHOR), Biswas, Arnab (AUTHOR) arnbiswas@wiley.com
Source: International Journal of Chemical Engineering (1687806X). 4/28/2026, Vol. 2026, p1-15. 15p.
Subjects: Dynamic simulation, Separation of gases, Energy consumption, Transient analysis, PID controllers, Process control systems, Sensitivity analysis
Abstract: This study develops steady‐state and dynamic models of a CO2 cryogenic separation process using Aspen HYSYS, focusing on control and operational robustness. The sensitive tray in the purification tower is identified using slope and sensitivity criteria, and PID controllers are applied with parameters tuned by empirical and relay autotuning. A representative steady‐state period shows that key variables, including flow rates, air release, liquefier cold load, reboiler heat load, subcooler cold load, CO2 recovery, and outlet temperatures, remain constant for up to 5 h, confirming stable operation. Dynamic performance is analyzed under typical disturbances, including a 10% increase in feed flow rate, a 2% increase in feed CO2 content, and a 10°C increase in feed temperature. Results indicate that increasing feed flow rate causes the strongest system‐wide transients and the largest impact on energy consumption. A 2% increase in CO2 content has minimal effects, while feed temperature mainly affects condenser/reboiler thermal behavior. This work establishes an integrated framework for steady‐state validation, sensitive‐tray identification, disturbance‐response analysis, and energy sensitivity assessment, providing valuable guidance for CO2 cryogenic separation units. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Chemical Engineering (1687806X) is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
  Group: Ti
  Data: Dynamic Simulation of the CO<subscript>2</subscript> Cryogenic Separation Process.
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  Data: <searchLink fieldCode="AR" term="%22Lin%2C+Mingzhen%22">Lin, Mingzhen</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> linmz1221@126.com</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Yingwei%22">Wang, Yingwei</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fan%2C+Wenbin%22">Fan, Wenbin</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Xiaoguang%22">Wang, Xiaoguang</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Hongfu%22">Chen, Hongfu</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Hegao%22">Liu, Hegao</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Lintao%22">Chen, Lintao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Haoze%22">Xu, Haoze</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Biswas%2C+Arnab%22">Biswas, Arnab</searchLink> (AUTHOR)<i> arnbiswas@wiley.com</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Chemical+Engineering+%281687806X%29%22">International Journal of Chemical Engineering (1687806X)</searchLink>. 4/28/2026, Vol. 2026, p1-15. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Dynamic+simulation%22">Dynamic simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Separation+of+gases%22">Separation of gases</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+consumption%22">Energy consumption</searchLink><br /><searchLink fieldCode="DE" term="%22Transient+analysis%22">Transient analysis</searchLink><br /><searchLink fieldCode="DE" term="%22PID+controllers%22">PID controllers</searchLink><br /><searchLink fieldCode="DE" term="%22Process+control+systems%22">Process control systems</searchLink><br /><searchLink fieldCode="DE" term="%22Sensitivity+analysis%22">Sensitivity analysis</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study develops steady‐state and dynamic models of a CO2 cryogenic separation process using Aspen HYSYS, focusing on control and operational robustness. The sensitive tray in the purification tower is identified using slope and sensitivity criteria, and PID controllers are applied with parameters tuned by empirical and relay autotuning. A representative steady‐state period shows that key variables, including flow rates, air release, liquefier cold load, reboiler heat load, subcooler cold load, CO2 recovery, and outlet temperatures, remain constant for up to 5 h, confirming stable operation. Dynamic performance is analyzed under typical disturbances, including a 10% increase in feed flow rate, a 2% increase in feed CO2 content, and a 10°C increase in feed temperature. Results indicate that increasing feed flow rate causes the strongest system‐wide transients and the largest impact on energy consumption. A 2% increase in CO2 content has minimal effects, while feed temperature mainly affects condenser/reboiler thermal behavior. This work establishes an integrated framework for steady‐state validation, sensitive‐tray identification, disturbance‐response analysis, and energy sensitivity assessment, providing valuable guidance for CO2 cryogenic separation units. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Chemical Engineering (1687806X) is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1155/ijce/5612676
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 15
        StartPage: 1
    Subjects:
      – SubjectFull: Dynamic simulation
        Type: general
      – SubjectFull: Separation of gases
        Type: general
      – SubjectFull: Energy consumption
        Type: general
      – SubjectFull: Transient analysis
        Type: general
      – SubjectFull: PID controllers
        Type: general
      – SubjectFull: Process control systems
        Type: general
      – SubjectFull: Sensitivity analysis
        Type: general
    Titles:
      – TitleFull: Dynamic Simulation of the CO2 Cryogenic Separation Process.
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            NameFull: Lin, Mingzhen
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            – D: 28
              M: 04
              Text: 4/28/2026
              Type: published
              Y: 2026
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