Thermal degradation of piperazine blends with diamines

Omkar Namjoshi, Le Li, Yang Du, Gary Rochellea

Research output: Contribution to journalConference articlepeer-review


Concentrated, aqueous piperazine (PZ) has been developed as an attractive solvent for use in CO2 capture for coalfired power plants because of its low degradation rate, high CO2 capacity, and high CO2 absorption rate, but its use may be limited by precipitation of solids at low and high CO2 loading. In this work we examine the effects of blending diamines, such as hexamethylenediamine (HMDA), 1,4-diaminobutane (DAB), or bis(aminoethyl)ether (BAE), with PZ on thermal degradation of the amine. The presence of the diamine does not catalyze the thermal degradation of piperazine and appears to degrade independently of piperazine; in particular, HMDA and BAE appear to have thermal degradation rates that are competitive with piperazine.

Original languageEnglish (US)
Pages (from-to)1904-1911
Number of pages8
JournalEnergy Procedia
StatePublished - 2013
Externally publishedYes
Event11th International Conference on Greenhouse Gas Control Technologies, GHGT 2012 - Kyoto, Japan
Duration: Nov 18 2012Nov 22 2012


  • Diamines
  • Piperazine
  • Solvent management
  • Thermal degradation

ASJC Scopus subject areas

  • General Energy


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