Volatility of amines for CO2 capture

Yang Du, Ye Yuan, Gary T. Rochelle

Research output: Contribution to journalReview articlepeer-review


Volatility is a critical criterion for amine selection for CO2 capture from low pressure gas streams. The Henry's law constant (Ham) in water of 24 novel amines, including 18 tertiary amines, 3 hindered amines, 2 ether amines, and 1 pyridine derivative was measured at 40 °C using a hot gas FTIR. 14 of them have a Ham less than 2-amino-2-methyl-1-propanol (AMP). A group contribution model that correlates Ham to molecular structure was developed based on the data from this work and data from literature. Non-cyclic groups and cyclic groups have significant effect on the volatility of the amine. The amine partial pressure (Pam) of tertiary and hindered amines was also measured in a blend with PZ at 40 °C and their normal CO2 loading range for flue gas CO2 capture. With increased pKa, the Pam of tertiary and hindered amines becomes a stronger function of CO2 loading. These results at nominal lean loading were correlated with Ham of the amine.

Original languageEnglish (US)
Pages (from-to)1-9
Number of pages9
JournalInternational Journal of Greenhouse Gas Control
StatePublished - Mar 1 2017


  • Amine
  • CO capture
  • Henry's law constant
  • Model
  • Volatility

ASJC Scopus subject areas

  • Pollution
  • General Energy
  • Management, Monitoring, Policy and Law
  • Industrial and Manufacturing Engineering


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