Amine-Based Ionic Liquid for CO<sub>2</sub> Capture and Electrochemical or Thermal Regeneration
Sahag Voskian, Paul Brown, Cameron Halliday, Krzysztof Rajczykowski, T. Alan Hatton
Abstract
An ethylenediamine-functionalized ionic liquid (IL) was synthesized for CO2 capture from industrial gases, with good CO2 absorption capacity of around 0.95 mmol (42 mg) of CO2/g of IL at 35 °C. In contrast to conventional gas desorption via utilization of an energy intensive thermal swing, CO2 was released on competitive complexation of the amines with cupric ions introduced to the ionic liquid electrolyte by the oxidation of a copper electrode. The electrolyte was regenerated by electrodeposition of cupric ions at the cathode. This work emphasizes the importance of electrodeposition from metal-containing ILs and the potential for new recyclable catalysts.
Topics & Concepts
Ionic liquidElectrolyteElectrochemistryEthylenediamineInorganic chemistryChemistryCopperAmine gas treatingCatalysisIonic bondingDesorptionIonChemical engineeringElectrodeAdsorptionOrganic chemistryPhysical chemistryEngineeringIonic liquids properties and applicationsCO2 Reduction Techniques and CatalystsCatalysis and Oxidation Reactions