Amine Scrubbing for CO 2 Capture

Abstract

Amine scrubbing has been used to separate carbon dioxide (CO₂) from natural gas and hydrogen since 1930. It is a robust technology and is ready to be tested and used on a larger scale for CO₂ capture from coal-fired power plants. The minimum work requirement to separate CO₂ from coal-fired flue gas and compress CO₂ to 150 bar is 0.11 megawatt-hours per metric ton of CO₂. Process and solvent improvements should reduce the energy consumption to 0.2 megawatt-hour per ton of CO₂. Other advanced technologies will not provide energy-efficient or timely solutions to CO₂ emission from conventional coal-fired power plants.