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Low-temperature regeneration through chemically triggered physical CO2 absorption.

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Title: Low-temperature regeneration through chemically triggered physical CO2 absorption.
Authors: Yin, Shuai1,2 (AUTHOR), Jiang, Bin1 (AUTHOR), Meng, Haoyu1 (AUTHOR), Ma, Zishuo1 (AUTHOR), Zhang, Feng1,2 (AUTHOR) zf@nju.edu.cn, Geng, Jiao1 (AUTHOR) gengjiao@nju.edu.cn
Source: Chemical Engineering Journal. Aug2026, Vol. 542, pN.PAG-N.PAG. 1p.
Subjects: Absorption, Tertiary amines, Carbon dioxide, Carbon sequestration, Ethylene glycol, Energy consumption
Abstract: Reducing the regeneration temperature is an effective way to decrease the energy consumption in carbon dioxide capture. The anhydrous absorbent prepared by blending tertiary amines with ethylene glycol (EG) can form an unstable chemical structure with CO 2 , constituting a quasi- physical absorption system that can be efficiently regenerated below 60 °C or under light conditions. Experimental results and theoretical analysis reveal that glycolate (EGCOO−), which is produced through tertiary-amine catalysis, can boost additional CO 2 uptake physical absorption Since EGCOO− is inherently unstable and the physically absorbed CO 2 is easily released, N , N , N ′, N ′-tetramethyl-1,6-hexanediamine (TMHDA)-EG system maintains effective absorption/desorption cycling within 30 °C–55 °C, making it well-suited for CO 2 capture and release under conditions with pronounced diurnal temperature fluctuations. The absorbent could be regenerated with a solar simulator, showing excellent energy adaptability in industries. Such absorbents may serve as CO 2 carriers for greenhouse agriculture on Earth or for future extraterrestrial bases, enabling regulation of CO 2 concentrations to promote indoor agricultural productivity. [Display omitted] • Anhydrous TMHDA-EG enables tertiary-amine-catalyzed CO 2 absorption and regeneration at 55 °C. • Alcohol-CO 2 reactions create new oxygen sites that promote quasi-physical CO 2 uptake. • Demonstrated stable cyclic regeneration of the absorbent under low-grade heat and light irradiation. [ABSTRACT FROM AUTHOR]
Copyright of Chemical Engineering Journal is the property of Elsevier B.V. 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.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 194700120
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: Low-temperature regeneration through chemically triggered physical CO2 absorption.
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  Data: <searchLink fieldCode="AR" term="%22Yin%2C+Shuai%22">Yin, Shuai</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jiang%2C+Bin%22">Jiang, Bin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Meng%2C+Haoyu%22">Meng, Haoyu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ma%2C+Zishuo%22">Ma, Zishuo</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Feng%22">Zhang, Feng</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> zf@nju.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Geng%2C+Jiao%22">Geng, Jiao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> gengjiao@nju.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Chemical+Engineering+Journal%22">Chemical Engineering Journal</searchLink>. Aug2026, Vol. 542, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Absorption%22">Absorption</searchLink><br /><searchLink fieldCode="DE" term="%22Tertiary+amines%22">Tertiary amines</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+dioxide%22">Carbon dioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+sequestration%22">Carbon sequestration</searchLink><br /><searchLink fieldCode="DE" term="%22Ethylene+glycol%22">Ethylene glycol</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+consumption%22">Energy consumption</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Reducing the regeneration temperature is an effective way to decrease the energy consumption in carbon dioxide capture. The anhydrous absorbent prepared by blending tertiary amines with ethylene glycol (EG) can form an unstable chemical structure with CO 2 , constituting a quasi- physical absorption system that can be efficiently regenerated below 60 °C or under light conditions. Experimental results and theoretical analysis reveal that glycolate (EGCOO−), which is produced through tertiary-amine catalysis, can boost additional CO 2 uptake physical absorption Since EGCOO− is inherently unstable and the physically absorbed CO 2 is easily released, N , N , N ′, N ′-tetramethyl-1,6-hexanediamine (TMHDA)-EG system maintains effective absorption/desorption cycling within 30 °C–55 °C, making it well-suited for CO 2 capture and release under conditions with pronounced diurnal temperature fluctuations. The absorbent could be regenerated with a solar simulator, showing excellent energy adaptability in industries. Such absorbents may serve as CO 2 carriers for greenhouse agriculture on Earth or for future extraterrestrial bases, enabling regulation of CO 2 concentrations to promote indoor agricultural productivity. [Display omitted] • Anhydrous TMHDA-EG enables tertiary-amine-catalyzed CO 2 absorption and regeneration at 55 °C. • Alcohol-CO 2 reactions create new oxygen sites that promote quasi-physical CO 2 uptake. • Demonstrated stable cyclic regeneration of the absorbent under low-grade heat and light irradiation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Chemical Engineering Journal is the property of Elsevier B.V. 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: 10.1016/j.cej.2026.177820
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
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      – SubjectFull: Absorption
        Type: general
      – SubjectFull: Tertiary amines
        Type: general
      – SubjectFull: Carbon dioxide
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      – SubjectFull: Carbon sequestration
        Type: general
      – SubjectFull: Ethylene glycol
        Type: general
      – SubjectFull: Energy consumption
        Type: general
    Titles:
      – TitleFull: Low-temperature regeneration through chemically triggered physical CO2 absorption.
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            NameFull: Yin, Shuai
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            NameFull: Jiang, Bin
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            NameFull: Meng, Haoyu
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            NameFull: Ma, Zishuo
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            NameFull: Zhang, Feng
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              M: 08
              Text: Aug2026
              Type: published
              Y: 2026
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              Value: 542
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            – TitleFull: Chemical Engineering Journal
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