Process analysis for the carbon dioxide chemical absorption–regeneration system

Claudio Madeddu, Massimiliano Errico*, Roberto Baratti

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The process analysis for the post-combustion CO2 capture using amine-based solvents is nowadays a fundamental step in its industrial scale design. In this work, the absorption-solvent regeneration system is deeply analyzed for different values of the loading in the solvent entering the absorber. The importance of the temperature and composition column profiles is highlighted for both the columns. In particular, the tight connection between the profiles and the L/G ratio is found to influence the choice of solvent flow rate for what concerns the absorber. On the other hand, an alternative configuration for the stripper is proposed together with a new criterion for the evaluation of the packing height. Finally, it is found that, in order to minimize the energy consumption in the stripper, the rich solvent must be sent at the highest possible temperature, taking into account the limitations imposed by the minimum temperature approach in the cross heat-exchanger and the solvent degradation.

Original languageEnglish
JournalApplied Energy
Volume215
Pages (from-to)532-542
Number of pages11
ISSN0306-2619
DOIs
Publication statusPublished - 1. Apr 2018

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Carbon dioxide
carbon dioxide
Temperature
Heat exchangers
process analysis
chemical
Amines
Energy utilization
regeneration
combustion
temperature
Flow rate
Degradation
degradation
Chemical analysis

Keywords

  • CCS post-combustion
  • CO
  • Energy consumption
  • Process analysis
  • Process design

Cite this

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title = "Process analysis for the carbon dioxide chemical absorption–regeneration system",
abstract = "The process analysis for the post-combustion CO2 capture using amine-based solvents is nowadays a fundamental step in its industrial scale design. In this work, the absorption-solvent regeneration system is deeply analyzed for different values of the loading in the solvent entering the absorber. The importance of the temperature and composition column profiles is highlighted for both the columns. In particular, the tight connection between the profiles and the L/G ratio is found to influence the choice of solvent flow rate for what concerns the absorber. On the other hand, an alternative configuration for the stripper is proposed together with a new criterion for the evaluation of the packing height. Finally, it is found that, in order to minimize the energy consumption in the stripper, the rich solvent must be sent at the highest possible temperature, taking into account the limitations imposed by the minimum temperature approach in the cross heat-exchanger and the solvent degradation.",
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Process analysis for the carbon dioxide chemical absorption–regeneration system. / Madeddu, Claudio; Errico, Massimiliano; Baratti, Roberto.

In: Applied Energy, Vol. 215, 01.04.2018, p. 532-542.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Process analysis for the carbon dioxide chemical absorption–regeneration system

AU - Madeddu, Claudio

AU - Errico, Massimiliano

AU - Baratti, Roberto

PY - 2018/4/1

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N2 - The process analysis for the post-combustion CO2 capture using amine-based solvents is nowadays a fundamental step in its industrial scale design. In this work, the absorption-solvent regeneration system is deeply analyzed for different values of the loading in the solvent entering the absorber. The importance of the temperature and composition column profiles is highlighted for both the columns. In particular, the tight connection between the profiles and the L/G ratio is found to influence the choice of solvent flow rate for what concerns the absorber. On the other hand, an alternative configuration for the stripper is proposed together with a new criterion for the evaluation of the packing height. Finally, it is found that, in order to minimize the energy consumption in the stripper, the rich solvent must be sent at the highest possible temperature, taking into account the limitations imposed by the minimum temperature approach in the cross heat-exchanger and the solvent degradation.

AB - The process analysis for the post-combustion CO2 capture using amine-based solvents is nowadays a fundamental step in its industrial scale design. In this work, the absorption-solvent regeneration system is deeply analyzed for different values of the loading in the solvent entering the absorber. The importance of the temperature and composition column profiles is highlighted for both the columns. In particular, the tight connection between the profiles and the L/G ratio is found to influence the choice of solvent flow rate for what concerns the absorber. On the other hand, an alternative configuration for the stripper is proposed together with a new criterion for the evaluation of the packing height. Finally, it is found that, in order to minimize the energy consumption in the stripper, the rich solvent must be sent at the highest possible temperature, taking into account the limitations imposed by the minimum temperature approach in the cross heat-exchanger and the solvent degradation.

KW - CCS post-combustion

KW - CO

KW - Energy consumption

KW - Process analysis

KW - Process design

KW - CCS post-combustion

KW - CO2

KW - Process analysis

KW - Process design

KW - Energy consumption

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DO - 10.1016/j.apenergy.2018.02.033

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EP - 542

JO - Applied Energy

JF - Applied Energy

SN - 0306-2619

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