Injection technology and operations
CO2 lakes must be on the sea floor at a depth below 3000 m 6.5.1 Background (Figures 6.20 and 6.21), because the liquid CO2 must be denser than surrounding sea water (Box 6.2).
These ocean general circulation model calculations did not consider interactions with CaCO sediments or marine biota.
Increased CO2 concentrations in the ocean promote dissolution of CaCO3 sediments, which would tend to increase predicted CO2 retention. This has been modelled for the deep sea with results of greater retention for release in the Atlantic because of high CaCO3 inventory in Atlantic sediments (Archer et al.,
Preliminary numerical simulations of ocean CO2 injection predict increased oceanic retention of injected CO2 with concurrent global warming due to weaker overturning and a more stratified ocean (Jain and Cao, 2005). Some evidence indicates recent increases in stratification in all major ocean basins (e.g., Joos, 2003; McPhaden and Zhang, 2002; Palmer et al., 2004; Stramma et al., 2004).
The amounts of sea water and limestone required to neutralize the acidity of added CO2 indicate that limestone neutralization would be most suitable for CO2 point sources located near both the ocean and large deposits of limestone (Rau and Caldeira,
Was this article helpful?
Your Alternative Fuel Solution for Saving Money, Reducing Oil Dependency, and Helping the Planet. Ethanol is an alternative to gasoline. The use of ethanol has been demonstrated to reduce greenhouse emissions slightly as compared to gasoline. Through this ebook, you are going to learn what you will need to know why choosing an alternative fuel may benefit you and your future.