CO_(2) Sequestration at Sea by Gas-Lift System of Shallow Injection and Deep Releasing

TAKAYUKI SAITO; TAKEO KAJISHIMA; RYUICHI NAGAOSA

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CO_(2) Sequestration at Sea by Gas-Lift System of Shallow Injection and Deep Releasing

机译：CO_(2) Sequestration at Sea by Gas-Lift System of Shallow Injection and Deep Releasing

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To mitigate global warming, a system dissolving huge amounts of CO_(2) gas captured from fossil fuel fired power plants into the ocean with high acceptance by the ocean environment is indispensable. To this aim, we propose a sequestration system of CO_(2) in the deep ocean. The system is an inverse-J pipeline set in the ocean at a depth of 200-3000 m. In the system, a pumping effect by buoyancy of the dissolving CO_(2) bubbles is used to transport CO_(2)-rich seawater to great depths. In the present paper, we discuss characteristics and performance of our proposal on the basis of experimental and numerical investigation. In a laboratory-scale experiment (pipe diameter of 25 mm and pipe height of 7.69 m), we observed over 98 dissolution of injected CO_(2) gas into tap water. The liquid-phase flow caused by gas-lift effect was strong enough to transport the CO_(2)-rich water including nondissolved tiny bubbles into the deep ocean. Then a numerical simulation based on the experimentally derived models was applied to a system considering 10 MW class power plants. The results showed that our proposal is hopeful for an efficient method of CO_(2) disposal into the deep ocean.

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《Environmental Science & Technology: ES&T》 |2000年第19期|4140-4145|共6页
作者
TAKAYUKI SAITO; TAKEO KAJISHIMA; RYUICHI NAGAOSA;
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作者单位

Faculty of Engineering, Shizuoka University, Johoku 3-5-1, Hamamatsu, Shizuoka 432-8561, Japan;

Faculty of Engineering, Osaka University, Yamadaoka, Suita, Osaka 565-0871, Japan;

National Institute for Resources and Environment, Onogawa 16-3, Tsukuba, Ibaraki 305-8569, Japan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境化学;
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CO_(2) Sequestration at Sea by Gas-Lift System of Shallow Injection and Deep Releasing

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