碩士 / 國立交通大學 / 環境工程所 / 88 / The greenhouse effect is a serious problem that leads worldwide concerns, and the carbon dioxide is the major source that causes the global warming. The carbon dioxide removal techniques from flue gas streams are mature so that they can be applied anytime upon requested. However, the removed carbon dioxide still required further disposal. The ocean is a major sink of carbon dioxide in the carbon balance cycle. The carbon dioxide in the deep ocean remains unsaturated therefore ocean could be a good disposal site for the collected carbon dioxide.
The focus of this study is on the evaluation of possibility for releasing liquid carbon dioxide at intermediate ocean depth. In order to understand the phenomenon of dissolution in deeper ocean, mass transfer correlation approach is employed. The results show that shrinkage rate (-dr/dt) of CO2 droplets considering the effect of hydrate film is about 4.56 ×10-7 ~ 1.27 ×10-6 m/s, and it decreases with the increasing injection depth or with larger the droplet radii of liquid CO2 .
The effects of initial drop radii and initial releasing position of liquid CO2 are evaluated. When a CO2 droplet is released to the deeper depth at a constant size, the dissolving distance of the CO2 droplet becomes shorter and its dissolving becomes longer. Additionally, the maximum initial droplet radii and the distance of dissolution of carbon dioxide are calculated. The maximum allowable injection radius of the CO2 droplet is 0.72 cm at the depth of 1500m, and 0.48cm at the depth of 1000m. The results of this study can provide the decision makers as a reference on marine disposal carbon dioxide
Identifer | oai:union.ndltd.org:TW/088NCTU0515010 |
Date | January 2000 |
Creators | Yuhor Kang, 康育豪 |
Contributors | 白曛綾 |
Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
Language | zh-TW |
Detected Language | English |
Type | 學位論文 ; thesis |
Format | 113 |
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