CARBON CAPTURE

Working: 

• While most methods of removing carbon dioxide from a stream of gas required higher concentrations such as those found in the flue emissions from fossil fuel-based power plants, the new method could take out the gas even when it was present in very low concentrations.
  
  
• The device is a large, specialized battery with a stack of electrodes that absorbs carbon dioxide from the air passing over its surface as it was being charged up, and then released the gas as it was being discharged.
  
  
• A chemical reaction takes place at the surface of each of a stack of electrodes as the battery charges. Electrodes are coated with a compound called polyanthraquinone compounded with carbon nanotubes.
  
  
• The electrodes have a natural affinity for carbon dioxide and readily reacted with its molecules in the airstream or feed gas. The device operates at room temperature and normal air pressure.