Carbon Dioxide Capture by Absorption with Potassium Carbonate
Project No.: FC26-02NT41440

  Pilot Plant at the University of Texas
Pilot Plant at the University of Texas

The University of Texas at Austin investigated an improved process for CO2 capture by alkanolamine absorption that uses an alternative solvent, aqueous potassium carbonate (K2CO3) promoted by piperazine (PZ). If successful, this process would use less energy for CO2 capture than the conventional monoethanolamine (MEA) scrubbing process. An improved capture system would mean a relative improvement in overall power plant efficiency.

The project developed models to predict the performance of absorption/stripping of CO2 using the improved solvent and perform a pilot plant study to validate the process models and define the range of feasible process operations. See photograph of the pilot plant located at the University of Texas. As part of the pilot plant study, a test with MEA was conducted as a baseline to compare CO2 absorption and stripping performance with tests using the K2CO3/PZ solvent. Researchers also investigated key issues such as solvent degradation, solvent reclamation, corrosion, and alternative stripper configurations.

Related Papers and Publications:


  • For further information on this project, contact the NETL Project Manager, David A. Lang.