Aqueous piperazine/N-(2-aminoethyl) piperazine for CO2 capture

Yang Du, Le Li, Omkar Namjoshi, Alexander K. Voice, Nathan A. Fine, Gary T. Rochelle

Research output: Contribution to journalConference articlepeer-review


A novel blend of piperazine (PZ) with N-(2-aminoethyl) piperazine (AEP) has been proposed as a superior solvent for CO2 capture from coal-fired flue gas. Blending PZ with AEP can remediate the precipitation issue of concentrated PZ while maintaining its high CO2 absorption rate, and high resistance to degradation. Although PZ/AEP has a lower CO2 capacity than concentrated piperazine, its higher heat of absorption may offset the negative effect on energy consumption. PZ/AEP also shows a milder nitrosamine issue than concentrated piperazine. A novel method for synthesizing AEP using PZ and monoethanolamine (MEA) was also developed to lower the solvent cost in industry application.

Original languageEnglish (US)
Pages (from-to)1621-1638
Number of pages18
JournalEnergy Procedia
StatePublished - 2013
Externally publishedYes
Event11th International Conference on Greenhouse Gas Control Technologies, GHGT 2012 - Kyoto, Japan
Duration: Nov 18 2012Nov 22 2012


  • Aminoethylpiperazine
  • Degradation
  • Nitrosamine
  • Piperazine
  • Solvent blend

ASJC Scopus subject areas

  • General Energy


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