Effect of contaminants on the behavior of CO2 droplets in deep sea.

Thao Nguyen, Jin Hwan Hwang

Wednesday 1 july 2015

12:54 - 12:57h at Asia (level 0)

Themes: (T) Hydro-environment, (ST) Impacts of pollutants on the water environment, Poster pitches

Parallel session: Poster pitches: 9G. Environment - Impact

Carbon Capture and Storage with ocean sequestration is being considered as one of the most effective option for reducing the CO2 net flux from atmosphere nowadays. But it is still possible for CO2 substance to leaks out from transport pipeline or from the under seabed storage sites and causing damage to ambient environment. The behavior of liquid CO2 under droplet shape would be strongly affected by the presence of other contaminants such as SOx, NOx, etc. This presentation shows the behavior in the sea water of pure liquid CO2 droplets as well as droplets that consist of other substances. The study uses computational fluid dynamic models in comparison with experimental data from other previous researchers. Droplet of liquid CO2 is assumed to be released at several depths in deep ocean, with other environmental conditions are set up respectively. All calculations are conducted with many different drop sizes to provide fundamental data of those particles rising characteristics. The effect of contaminants on the behavior of CO2 droplets would be clearly shown through the results of particle deformation, terminal rising velocity happen due to buoyancy force driving from the difference in density of CO2 substance and ocean water around, as well as data of time for each CO2 droplet to reach the sea surface or being completely dissolved, the results of CO2 concentration dispersion and ambient pH change.