Solution and Diffusion Process of Carbon Dioxide in Seawater
Solution and diffusion process of carbon dioxide (CO2) in seawater is important in the research and development of CO2 ocean sequestration technology to mitigate global warming. In the present study, solution processes of CO2 gas in seawater and synthetic seawater were experimentally and theoretically studied under various pressures and temperatures to evaluate the transport process of CO2 in seawater. It was obtained that the solubilities of CO2 increase with an increase in pressure, but decrease with an increase in temperature. The solubility of CO2 in synthetic seawater decreases with an increase in salt concentration. An empirical correlation for solubility of CO2 in seawater at various temperatures and pressures was obtained based on the experimental data. It can express the experimental data within 刡 6％, and express the data by Stewart and Munjal within 刡 15％ . In the theoretical analysis for the solution of single CO2 bubble in seawater, it was concluded that the rate of solution of bubble in liquid is affected strongly by various parameters, such as solubility, diffusion coefficient, bubble radius, and temperature. The bubble solution process is enhanced by lowering the temperature: the total solution time at 280 K is 20％ shorter than that at 293 K under the pressure of 4 MPa.
Solution process Seawater Solubility Henryˇs law constant Diffusion coefficient Bubble Solution time
Qiusheng Liu Katsuya Fukuda Daoxing Zhu
Department of Marine Engineering, Kobe University, Kobe 658-0022, Japan School of Maritime Sciences, Kobe University, Kobe 658-0022, Japan
国际会议
4th International Symposium on Heat Transfer and Energy Conservation(第四届传热与节能国际研讨会 ISHTEC2012)
广州
英文
1-5
2012-01-06（万方平台首次上网日期，不代表论文的发表时间）