Characterization and Performance of Direct Air Capture Sorbent

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

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)


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
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed


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

Fingerprint Dive into the research topics of 'Characterization and Performance of Direct Air Capture Sorbent'. Together they form a unique fingerprint.

Cite this