A new relevant membrane application: CO2 direct air capture (DAC)

Roberto Castro-Muñoz*, Mohd Zamidi Ahmad*, Magdalena Malankowska*, Joaquín Coronas*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Since carbon dioxide (CO2) is the primary greenhouse gas emitted due to human activities into the atmosphere, strong research efforts have been developed towards capturing and decreasing its production. Unfortunately, specific processes and activities make it impossible to avoid CO2 emissions. Among the different strategies scientists propose for CO2 reduction, direct CO2 capture from the atmosphere, also known as direct air capture (DAC), represents a promising alternative in which sorbents have been mainly used. Recently, gas separation membranes have also been speculated to carry out such a separation, thanks to their smaller footprint and simpler setup and operation; however, their application remains a proposition in the field. This paper gives a perspective of the ongoing research and attempts of DAC applications via membrane separation and introduces the main membrane materials and types used for CO2 separation. Finally, the process considerations for DAC using membranes are stated to guide the new researchers in the field.
Original languageEnglish
Article number137047
JournalChemical Engineering Journal
Volume446
Number of pages13
ISSN1385-8947
DOIs
Publication statusPublished - 2022

Keywords

  • Carbon dioxide
  • Direct air capture
  • Gas separation
  • Membrane
  • Polymer

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