Advantages and disadvantages of hydrate formation in ocean deposition of CO{sub 2}
- Institutt for Energiteknikk, Halden (Norway). OECD Halden Reactor Program (Norway)
Anthropogenic activity since the industrial revolution has led to an increase of the atmospheric concentration of CO{sub 2}. To reduce the large amount of CO{sub 2} emitted to the atmosphere, a substantial research activity focusing on concepts for CO{sub 2} removal and depositions is being done. The work described in this paper is focusing on ocean deposition concepts. CO{sub 2}-hydrate is thermodynamically stable and expected to form naturally at depths larger than about 450 meters provided a source of high concentration CO{sub 2} is available. Hydrate formation is expected to have influence on most ocean CO{sub 2} deposition concepts proposed. A mathematical model for hydrate formation and stability has been developed to predict the influence of CO{sub 2} hydrates on various concepts for CO{sub 2} deposition in the ocean. The model presented in this paper includes kinetic and thermodynamic phenomena relevant to the system CO{sub 2}-seawater system. The micro-scale thermodynamic hydrate model has been integrated with a macro-scale diffusion and convection model for ocean CO{sub 2} spreading. The paper gives a qualitative discussion of various concepts for CO{sub 2} deposition at the three depth domains in the ocean. It concludes with an analysis of the impact of hydrate formation on these concepts.
- OSTI ID:
- 379666
- Journal Information:
- World Resource Review, Vol. 8, Issue 3; Other Information: PBD: Sep 1996
- Country of Publication:
- United States
- Language:
- English
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