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Dissolution and dispersion of CO 2 from a liquid CO 2 pool in the deep ocean
Author(s) -
Shindo Yuji,
Fujioka Yuichi,
Komiyama Hiroshi
Publication year - 1995
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550271106
Subject(s) - dissolution , seawater , chemistry , advection , dispersion (optics) , current (fluid) , diffusion , liquid water , ocean current , oceanography , deep sea , carbon sequestration , carbon dioxide , geology , thermodynamics , earth science , physics , organic chemistry , optics
Liquid CO 2 sequestration in a bathymetric depression at depths greater than 3700 m in the ocean has been proposed as a mitigation strategy for the reduction of atmospheric CO 2 emissions. Kinetic studies on the dissolution of CO 2 from the liquid CO 2 pool, the diffusion in the ocean, and advection of CO 2 by the bottom ocean current are carried out. A thin membrane of CO 2 hydrate on the liquid CO 2 pool controls the CO 2 dissolution into the overlaying seawater, the thickness of a static layer between the surface of liquid CO 2 and the upper bottom ocean current reduces the CO 2 diffusion, and the bottom ocean current dilutes the CO 2 concentration. These effects are explicity formulated in an equation, and it is predicted that ocean CO 2 sequestration at a depth larger than 3700 m will greatly reduce the pH change caused by CO 2 dispersion in the ocean. © 1995 John Wiley & Sons, Inc.