Similar to flue gas, other gases in the atmosphere are N₂, O₂, and H₂O. This method allows for N₂, O₂, and H₂O to enter the atmosphere and for CO₂ to be separated so it can be compressed and sent to storage or to be utilized.ĬDR can be used to separate CO₂ from other gases in the atmosphere. Once the CO₂ has bound to the amines dissolved in water, the solution is heated up so the CO₂ can be captured in a pure stream and the amine solution can be used again.
The CO₂ binds to the amines and the other gases pass through unaffected and are vented to the atmosphere.
To isolate the CO₂ from these other gases, the flue gas is bubbled through special chemicals called amines that are dissolved in water. The CO₂ often makes up 4-30% of the gas mixture in flue gases. For example, flue gas that comes from a natural gas power plant will also have gases such as nitrogen (N₂), oxygen (O₂), and water vapor (H₂O). How does it work? ĬCS can be used to separate the CO₂ from other gases that are emitted from point-sources. There are many pathways to achieve CDR, such as planting trees and engineered direct air capture (DAC). Carbon dioxide removal (CDR) is a specific subset of CCS that results in the net-removal of CO₂ from the atmosphere. This can be applied to CO₂ emitters, or point-sources, specifically electricity generation from natural gas and industrial operations such as cement production, as well as to the ambient atmosphere. CCS What is it?Ĭarbon capture and storage (CCS) is the capture of carbon dioxide (CO₂). Carbon Dioxide Removal (CDR) vs Carbon Capture and Storage (CCS) Topic: CDR vs.
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