Wetting of Polypropylene Membranes by Aqueous Solutions in CO2 Absorbing Devices

Aldo Bottino, Antonio Comite, Camilla Costa, Renzo Di Felice, Elisa Varosio

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


A polypropylene hollow fiber membrane contactor was utilized to absorb CO2 from a gas stream into an aqueous solution. Three reagents were studied: monoethanolamine, piperazine, and potassium carbonate. Attention was focused on the possible intrusion of absorbent in the membrane pores, which reduces the solute mass-transfer rate. Membrane/liquid interface was thoroughly characterized. The removal efficiency of the reagents contacted with a CO2/N2 stream was assessed. It is shown that potassium carbonate and piperazine could be considered interesting candidates for applications in membrane contactors, as they appear more successful than monoethanolamine in ensuring proper and stable conditions at the membrane/liquid/gas interface.

Original languageEnglish
Pages (from-to)1860-1869
Number of pages10
JournalSeparation Science and Technology (Philadelphia)
Issue number12
Publication statusPublished - Aug 13 2015


  • CO absorption
  • contact angle
  • membrane contactor
  • piperazine
  • potassium carbonate
  • wettability

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Process Chemistry and Technology
  • Filtration and Separation

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