Research Highlights

Bubbling a flue gas mixture through an aqueous solution of a simple bis-iminoguanidine (GBIG) leads to CO2 capture as a crystalline bicarbonate salt. The X-ray crystal structure revealed ‘anti-electrostatic’ bicarbonate dimers stabilized by hydrogen bonding from guanidinium cations and water. Mild heating of the crystals releases the CO2 and regenerates the GBIG sorbent quantitatively so it can be recycled.

Hydrogen-Bonded Bicarbonate Dimers Provide Low-Energy Path to CO2 Capture

January 30, 2019

Bubbling a flue gas mixture through an aqueous solution of a simple bis-iminoguanidine (GBIG) leads to CO₂ capture as a crystalline bicarbonate salt.