271074 Aqueous Morpholine As a Potential Post-Combustion CO2 Absorption Solution

Thursday, November 1, 2012: 4:35 PM
301 (Convention Center )
Krishna Mohan Jinka, Taylor Kuhn, Joseph E. Remias, James K. Neathery and Kunlei Liu, Center for Applied Energy Research, University of Kentucky, Lexington, KY

Due primarily to high cyclic capacity and high absorption rates compared to other methods, aqueous amine based CO2 capture has gained great interest for application to post-combustion CO2 capture. While aqueous amines have a long history for acid gas removal, challenges remain for the commercial application to power plant post-combustion CO2 capture due to the high gas volume and low CO2 gas pressure. These challenges require a solvent able to simultaneously deliver high mass transfer rate, high thermal and oxidative stability, low corrosion, and low energy of solvent regeneration to effectively reduce the cost of post-combustion CO2 capture.  Morpholine was identified to potentially meet the above needs. The absorption of carbon dioxide into aqueous morpholine solutions (35-53 wt%) using a wetted wall column were performed using simulated flue gas at atmospheric pressure and with 3-14 vol% of CO2 to obtain the overall mass transfer coefficient. Temperatures between 30-40 °C were tested as a believed reasonable compromise between acceptable absorber tower temperatures and morpholine volatility.

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