Another carbon sequestration project is being undertaken by a team from the University of Leicester in England and the British Geological Society. This project is working on a means of storing CO2 in a solid form as a gas hydrate and also in liquid form as liquid CO2 under a cap of hydrate cemented sediments. To do this, the CO2 and water would be frozen at low temperatures and high pressures to produce a crystaline structure.

The carbon dioxide hydrate could be stored in a stable manner under ocean sediments according to experiments. Being able to capture and store large quantities of CO2 in this way could potentially be very beneficial but it raises several questions. How much energy would be required to freeze and then place the solids in storage? The ocean floor is not necessarily a static place, so what would happen if there is a submarine earthquake, that releases the carbon hydrates? What would be the result of a potential large scale release of the carbon dioxide? Would the pressure at the ocean floor be sufficient to maintain the solid state and prevent a release of CO2? The concept of carbon sequestration holds great potential for reducing the amount of greenhouse gases that human activity puts into the atmosphere. Hopefully, these questions will be answered soon and we can start to move down this path.

[Source: University of Leicester]

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