CO2 sequestration

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C02 sequestration is the capture, extraction, separation, collection, etc, of carbon dioxide and a means for its storage or use.

Methods of CO2 sequestration include:

Adsorption

[www.netl.doe.gov] (PDF file)

Amine extraction
Metal-organic frameworks (MOF's) [link] [link]
Mineral storage

Calcium oxide: Carbon Dioxide reacts with quicklime (calcium oxide), to form limestone (calcium carbonate). [link]

Serpentine: The metamorphic mineral serpentine (magnesium silicate hydroxide), is composed of magnesium, silicon and oxygen.

Ovivine: [link] [link]

Molecular Sieve
Polymer membrane gas separators [link] [link]
Porous carbon
Reversing heat exchangers

Regenerative Carbon Dioxide Removal System (RCRS)

The RCRS on the space shuttle Orbiter uses a two-bed system that provides continuous removal of CO2 without expendable products. Regenerable systems allow a shuttle mission a longer stay in space without having to replenish its sorbent canisters. Older lithium hydroxide (LiOH)-based systems, which are non-regenerable, are being replaced by regenerable metal-oxide-based systems. A metal-oxide-based system primarily consists of a metal oxide sorbent canister and a regenerator assembly. This system works by removing carbon dioxide using a sorbent material and then regenerating the sorbent material. The metal-oxide sorbent is regenerated by pumping air heated to around 400º F at 7.5 scfm through its canister for 10 hours. [link]

[www.osti.gov] the capture, utilization and disposal of carbon dioxide from fossil fuel-fired power plants(pdf)

news on co2 sequestration

[Sieves put a lid on greenhouse gas]

[Japan to capture CO2 at Australian power plant]

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