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Amine gas plant at a natural gas field. Amine gas treating, also known as amine scrubbing, gas sweetening and acid gas removal, refers to a group of processes that use aqueous solutions of various alkylamines (commonly referred to simply as amines) to remove hydrogen sulfide (H 2 S) and carbon dioxide (CO 2) from gases.
A carbon dioxide scrubber is a piece of equipment that absorbs carbon dioxide (CO 2). It is used to treat exhaust gases from industrial plants or from exhaled air in life support systems such as rebreathers or in spacecraft, submersible craft or airtight chambers. Carbon dioxide scrubbers are also used in controlled atmosphere (CA) storage and ...
At low temperatures, CO 2 is preferentially absorbed by the amines and at high temperatures CO 2 is desorbed. While liquid amine solutions have been used industrially to remove acid gases for nearly a century, amine scrubber technology is still under development at the scale required for carbon capture. [14]
MEA carbon dioxide scrubbing is also used to regenerate the air on submarines. Solutions of MEA in water are used as a gas stream scrubbing liquid in amine treaters. [21] For example, aqueous MEA is used to remove carbon dioxide (CO 2) and hydrogen sulfide (H 2 S) from various gas streams; e.g., flue gas and sour natural gas. [22]
The Saskatchewan Government's Boundary Dam Integrated Carbon Capture and Sequestration Demonstration Project will use post-combustion, amine-based scrubber technology to capture 90% of the CO 2 emitted by Unit 3 of the power plant; this CO 2 will be pipelined to and utilized for enhanced oil recovery in the Weyburn oil fields. [14]
A typical amine gas treating process flow diagram. Ionic liquids for use in CO 2 capture by absorption could follow a similar process.. A typical CO 2 absorption process consists of a feed gas, an absorption column, a stripper column, and output streams of CO 2-rich gas to be sequestered, and CO 2-poor gas to be released to the atmosphere.
Typically polymeric membranes, either glassy or rubbery, are used for direct air capture. Glassy membranes typically exhibit high selectivity with respect to Carbon Dioxide; however, they also have low permeabilities. Membrane capture of carbon dioxide is still in development and needs further research before it can be implemented on a larger ...
Drilling of the Sleipner Oil and Gas Field initiated a project in 1996 to remove the carbon dioxide from the gas it was acquiring from the gas field some 800 metres (2,600 ft) below the sea level. [31] It was rated with around 9% CO 2, which needed to be reduced significantly if the gas was to be commercially acceptable. [32]