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Shrinkage of liquid CO 2 droplets in water
Author(s) -
Fujioka Y.,
Takeuchi K.,
Shindo Y.,
Komiyama H.
Publication year - 1994
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4440180807
Subject(s) - shrinkage , dissolution , hydrate , clathrate hydrate , chemistry , seawater , materials science , mineralogy , chemical engineering , composite material , analytical chemistry (journal) , chromatography , geology , organic chemistry , engineering , oceanography
The shrinkage rate of liquid CO 2 droplets in water at 3°C was measured by the use of high‐pressure vessel placed in a constant‐temperature room. The change of the diameter of the droplet was observed at pressures of 28 MPa and 35 MPa using a time‐lapse video camera. Bromocresol green was employed as a pH indicator, and was effective in monitoring the profile of carbonic acid distribution. When a droplet of liquid CO 2 was injected, CO 2 hydrate immediately formed and covered the surface of the droplet. The diameter of the liquid CO 2 droplet reduced gradually at a rate of 5.0 × 10 −7 m/s. It is predicted, from the viewpoint of ocean CO 2 sequestration, that a thin film of hydrate will form at the interface of sea water and liquid CO 2 , and that the hydrate film will greatly control the dissolution of CO 2 into sea water.