Post-Combustion

Research and Education of CO2 Separation from Coal Combustion Flue Gases with Regenerable Magnesium Solutions
Project No.: DE-FE0001834

DOE is partnering with the University of Cincinnati to conduct research and training on separating CO2 from post-combustion coal-fired power plant flue gases using regenerable magnesium hydroxide (Mg(OH)2) slurry, followed by a regeneration step (separating CO2 from solvent). Mg(OH)2 is readily available commercially and/or may be easily and economically reclaimed from power plants using lime-based flue gas desulfurization systems. The proposed research is to effectively and reliably separate CO2 from flue gases for potential storage or utilization purposes by using the magnesium hydroxide slurry to achieve 95% CO2 purity.

The goal of this project is to integrate ongoing research on CO2 separation from flue gasses using regenerable magnesium solutions with engineering education in the field of carbon capture, utilization and storage (Figure 1). Regenerable magnesium solutions have the potential to contribute to the effort to capture CO2 while minimizing the overall cost of capture. The research objective is to determine the proof-of-concept of the proposed technology by conducting additional investigations.

Block and Process Flow Diagrams of proposed University of Cincinnati concept of CO2 separation from coal combustion flue gases using regenerable magnesium solutions.
Figure 1: Block and Process Flow Diagrams of proposed University of Cincinnati concept of CO2 separation from coal combustion flue gases using regenerable magnesium solutions. The proposed research will separate CO2 from flue gases by means of CO2 absorption using a Mg(OH)2 slurry, followed by a regeneration step. (click to enlarge)

Related Papers and Publications:

Contacts:

  • For further information on this project, contact the NETL Project Manager, Elaine Everitt
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