Experimental Study of Dissolution Rate of a CO2 Droplet and CO2 Solubility in High Pressure and Low Temperature Seawater With Hydrate Free

Yongchen Song, Baixin Chen, Masahiro Nishio, Makato Akai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Against the background of carbon dioxide (CO2) ocean sequestration technology, we investigated the solubility of CO2 in seawater at a thermodynamic state similar to that at an ocean depth of 1000 m. The experiment was performed in two steps. In the first step, we reexamined and modified the fundamental relationship between Sherwood (Sh) number and Rayleigh (Ra) number in a natural convective flow over an up-down CO2 droplet. We derived a new expression of the Grashof number for CO2 dissolution in water and seawater with the aid of the relation between the density of CO2 solution and CO2 concentration. In the second step, this new expression was applied to the estimation of solubility of CO2 from experiments examining the dissolution of an individual CO2 droplet in seawater at hydrate-formable pressure and temperature states. We found from our experiments: that (1) at hydrate-formable conditions (step two), no hydrate appeared at interface between liquid CO2 and seawater throughout the experiments within 5 hours, which suggested that a thermodynamic state (pressure and temperature) is indispensable but not a complete condition for hydrate formation; and (2) associated with this dual nature, the data of CO2 solubility estimated from this experiment are much larger than those obtained by Kimuro et al [1] from experiments of hydrate coexistence. Our data ranged from 0.052 to 0.062 in mass fraction.

Original languageEnglish
Title of host publicationASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering
PublisherAmerican Society of Mechanical Engineers
Pages301-307
Number of pages7
Volume3
ISBN (Electronic)0791837386
ISBN (Print)0791837459
DOIs
Publication statusPublished - 2004
Event23rd International Conference on Offshore Mechanics and Arctic Engineering 2004 - Vancouver, BC, Canada
Duration: 20 Jun 200425 Jun 2004

Conference

Conference23rd International Conference on Offshore Mechanics and Arctic Engineering 2004
CountryCanada
CityVancouver, BC
Period20/06/0425/06/04

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

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    Song, Y., Chen, B., Nishio, M., & Akai, M. (2004). Experimental Study of Dissolution Rate of a CO2 Droplet and CO2 Solubility in High Pressure and Low Temperature Seawater With Hydrate Free. In ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering (Vol. 3, pp. 301-307). American Society of Mechanical Engineers. https://doi.org/10.1115/OMAE2004-51133