Characterization and Performance of Direct Air Capture Sorbent

Jere Elfving (Corresponding Author), Cyril Bajamundi, Juho Kauppinen

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

In this paper, a proprietary CO2 sorbent is characterized and its sorption capacity determined. FTIR-ATR spectroscopy suggests that the sorbent is composed of polystyrene functionalized with primary amine. The Toth isotherm is found to best fit to laboratory-scale CO2 sorption data in partial pressure range of 0.1-5 mbar. Chemisorption dominates at and below atmospheric CO2 partial pressure, especially in humid conditions. Humidity promotes total CO2 capacity by 20-34%. Temperature-dependent Toth model is used to estimate working capacity in different regeneration conditions. Temperature swing adsorption or temperature-vacuum swing adsorption can be utilized in direct air capture conditions, depending on the application.
Original languageEnglish
Pages (from-to)6087-6101
Number of pages15
JournalEnergy Procedia
Volume114
DOIs
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed

Fingerprint

Sorbents
Partial pressure
Sorption
Air
Adsorption
Chemisorption
Temperature
Atmospheric pressure
Isotherms
Amines
Polystyrenes
Atmospheric humidity
Spectroscopy
Vacuum

Keywords

  • CO2
  • direct air capture
  • adsorbent
  • Toth isotherm
  • working capacity

Cite this

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Characterization and Performance of Direct Air Capture Sorbent. / Elfving, Jere (Corresponding Author); Bajamundi, Cyril; Kauppinen, Juho.

In: Energy Procedia, Vol. 114, 2017, p. 6087-6101.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Characterization and Performance of Direct Air Capture Sorbent

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AU - Bajamundi, Cyril

AU - Kauppinen, Juho

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AB - In this paper, a proprietary CO2 sorbent is characterized and its sorption capacity determined. FTIR-ATR spectroscopy suggests that the sorbent is composed of polystyrene functionalized with primary amine. The Toth isotherm is found to best fit to laboratory-scale CO2 sorption data in partial pressure range of 0.1-5 mbar. Chemisorption dominates at and below atmospheric CO2 partial pressure, especially in humid conditions. Humidity promotes total CO2 capacity by 20-34%. Temperature-dependent Toth model is used to estimate working capacity in different regeneration conditions. Temperature swing adsorption or temperature-vacuum swing adsorption can be utilized in direct air capture conditions, depending on the application.

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KW - direct air capture

KW - adsorbent

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