CO2 sequestration

From Wikipedia, the free encyclopedia

CO2 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) [1] [2]
• Mineral storage

Calcium oxide: Carbon Dioxide reacts with quicklime (calcium oxide), to form limestone (calcium carbonate). [3]

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

Ovivine: [4] [5]

• Molecular Sieve
• Polymer membrane gas separators [6] [7]
• 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. [8]

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