Development of phase separation solvent for CO2 capture by aqueous (amine + ether) solution

Hiroshi Machida, Kazuki Oba, Takashi Tomikawa, Takehiro Esaki, Tsuyoshi Yamaguchi, Hirotoshi Horizoe

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


Phase separation solvents for CO2 absorption have been designed which transform into two liquid phases after CO2 absorption. We studied seven types of amines and one type of ether-mixed solvents and observed that there are three types of phase phenomena, namely, no phase separation, phase separation with CO2 scrubbing, and initially immiscible. We also observed that these types can be classified using the hydrophobicity of the amine. The solubility of CO2 was measured in the phase separation solvent. In the lower-pressure region, the solvent formed a single liquid phase. When the amount of CO2 in solution reached a separation point, the solvent separated into two liquid phases.

Original languageEnglish
Pages (from-to)64-70
Number of pages7
JournalJournal of Chemical Thermodynamics
Publication statusPublished - 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Physical and Theoretical Chemistry


Dive into the research topics of 'Development of phase separation solvent for CO2 capture by aqueous (amine + ether) solution'. Together they form a unique fingerprint.

Cite this