Cryogenic techniques

	Cryogenic techniques use low temperatures to cool, condense and purify carbon dioxide from gas streams. They have been applied to moderately concentrated carbon-dioxide streams.

Low temperature — cryogenics: flue gas under high pressure is cooled to sub-zero temperatures so only CO2 condenses and is then separated.

Low temperature — hydrates: chilled water is passed through cooling flue gas. Given the right temperature and pressure, CO2 and water freeze together to form ice-like crystals with the CO2 trapped inside (hydrates). The hydrates are removed and the CO2 released.

Learn about other capture technologies
Learn about the application of capture technologies
Learn about CO2CRC capture research
Learn about CO2CRC demonstration projects