Abstract
Captured CO2 could be deliberately injected into the ocean at great depth, where most of it would remain isolated from the atmosphere for centuries. CO2 can be transported via pipeline or ship for release in the ocean or on the sea floor. In Taiwan, CO2 release is preliminarily projected from 2010 to 2030 in an average amount of 6.957 Gt within this duration. If deep sea sequestration for CO2 can be the possible option in Taiwan, it seems to exists possible potential area delimited between 122.0°E to 122.5°E and 21.8°N to 22.3°N for CO2 sequestration on account of its isolated and flat topography. Apparently, the area to the southeast of Taiwan is found to reach a depth deeper than −3,000 m and can be taken as a testing area for pilot studies. This study searches the area using the contours from the depth of −4,554 to −5,500 m with 1-m interval; the area, topographic volume, maximum mean height (volume/area), and ocean volume are reported. If the emission rate is kept constantly, for 20-year storage it needs 3 m of thickness reaching the sea ridge at the depth −4,554 m using top-down style; for 100 years of storage it needs 12 m. On the other hand, if it accounts for the bottom the sea floor is taken as the reference and the accumulated CO2 is stored from the depth at −4,900 m using bottom-up style, it requires about 37 m for the 20-year storage and 61 m for one decade.
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Acknowledgments
The authors thank the Department of Geosciences, National Taiwan University, Taiwan, for providing useful tool and related map source of this study. The support from Institute of Nuclear Energy Research, Taiwan is also greatly appreciated.
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An erratum to this article is available at http://dx.doi.org/10.1007/s00477-015-1188-0.
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Shih, D.CF., Wu, YM. & Hu, JC. Potential volume for CO2 deep ocean sequestration: an assessment of the area located on western Pacific Ocean. Stoch Environ Res Risk Assess 24, 705–711 (2010). https://doi.org/10.1007/s00477-009-0357-4
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DOI: https://doi.org/10.1007/s00477-009-0357-4