Resuable Carbon Capture System

Feb-02-19 A new, reusable carbon capture system can trap carbon from coal-fired power plants more efficiently than current options.

The new system, from a team at Oak Ridge National Laboratory, relies on a class of organic compounds called bis-iminoguanidines (BIGs), which bind to specific negatively charged ions (anions). Realizing this binding ability can also be applied to bicarbonate anions, the team created an aqueous BIG solution that will capture CO2 molecules as flue gas moves through it. The captured CO2 will crystalize the BIG into bicarbonate salt, which can be collected so the CO2 can be extracted and captured, while the solidified BIG can be dissolved in water and reused indefinitely.

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