To reduce the large amount of C02 emitted to the atmosphere, several options for CO2 removal and deposition are considered. Three promising options are liquid CO2 disposed on the sea floor, liquid CO2 disposed in free water mass and shallow water dissolution. Since Corhydrate is thermodynamically stable at pressure higher than 4.45 MPa and temperatures less than 10.2 °c, it is expected to form naturally at depths larger than about 500 meters provided a source of high concentration C∼ is available. Hydrate formation is therefore expected to have significant influence on all deep ocean CO2 deposition options. In order to more quantitatively predict the influence of CO2 hydrates on various options for carbon dioxide deposition in the ocean, a comprehensive mathematical model for hydrate formation and stability has been developed. The model presented in this paper includes kinetics and thermodynamic phenomena relevant to the system high pressurized water and CO2, The microscale hydrate kinetics model is coupled with macroscale models for ocean disposal options, and simulation giving qualitative and quantitative indications of the effect of hydrate formation ∼n these options is done. Simulations indicate that formation of a thin hydrate film on the interface of liquid C02 and seawater on depths larger than 3500 meters will have a significant inhibiting effect on the spreading of C02 in the ocean, and thus a positive effect on long time storage feasibility. For intermediate depth C02 deposition option, as a descending C02 plume, hydrate formation will have a negative effect, by inhibiting dissolution of CO2 from the plume bubbles into the ambient ocean mass. The third option for ocean deposition, i.e. shallow water injection, will not be influenced by hydrate formation, since CO2 hydrate is not thermodynamically stable at the actual pressure and temperature.
Skip Nav Destination
The Fifth International Offshore and Polar Engineering Conference
June 11–16, 1995
The Hague, The Netherlands
How Does CO2-Hydrate Influence Options For Deep Ocean Carbon Dioxide Deposition?
Per Christer Lund
Per Christer Lund
Institutt for Energiteknikk
Search for other works by this author on:
Paper presented at the The Fifth International Offshore and Polar Engineering Conference, The Hague, The Netherlands, June 1995.
Paper Number: ISOPE-I-95-043
Published: June 11 1995
Lund, Per Christer. "How Does CO2-Hydrate Influence Options For Deep Ocean Carbon Dioxide Deposition?." Paper presented at the The Fifth International Offshore and Polar Engineering Conference, The Hague, The Netherlands, June 1995.
Download citation file:
Don't already have an account? Register
You could not be signed in. Please check your username and password and try again.
Could not validate captcha. Please try again.
Annual Article Package – 25
Annual Article Package – 50
A Model to Predict Gas Hydrate Equilibrium and Gas Hydrate Saturation in Porous Media Including Mixed CO 2 -CH 4 Hydrates