Carbon dioxide capture using phase change ionic liquids

摘要

Disclosed herein are methods for CO₂ capture that use phase change ionic liquids (PCILs) to remove the CO₂ from flue gas or other gas streams containing CO₂. PCILs have high CO₂ uptake and form a liquid PCIL-CO₂ complex when they react with C( )₂. When the liquid PCIL-CO₂ complex is heated to regenerate the solid PCIL material by removing the carbon dioxide, part of the heat needed to release the CO₂ can be supplied by the heat of fusion of the PCIL as it solidifies. Utilization of the heat of fusion of the PCIL to assist in its own regeneration can substantially reduce the parasitic energy loss associated with post-combustion CO₂ capture.