CO2 Sequestration at Sea by Gas-Lift System of Shallow Injection and Deep Releasing
CO2 Sequestration at Sea by Gas-Lift System of Shallow Injection and Deep Releasing
复制标题
浅注深放气举系统海上封存二氧化碳
DOI：
10.1021/es990155a
复制
发表时间：
2000
影响因子：
11.4
通讯作者：
R. Nagaosa
中科院分区：
文献类型：
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作者：
T. Saito;T. Kajishima;R. Nagaosa
为了缓解全球变暖，一个能够将化石燃料发电厂捕获的大量二氧化碳气体溶解到海洋中并被海洋环境高度接受的系统是必不可少的。为此，我们提出了在深海建立二氧化碳封存系统。该系统是一条逆J型管道，设置在200−3000 m深度的海洋中。在该系统中，溶解二氧化碳气泡的浮力产生的泵送效应用于将富含二氧化碳的海水输送到很深的地方。在本文中，我们在实验和数值研究的基础上讨论了我们建议的特征和性能。在实验室规模的实验中（管道直径为 25 mm，管道高度为 7.69 m），我们观察到注入的 CO2 气体有 98% 以上溶解到自来水中。气升效应引起的液相流足够强大，可以将富含二氧化碳的水（包括不溶解的微小气泡）输送到深海。然后，基于实验得出的模型的数值模拟被应用于系统......
To mitigate global warming, a system dissolving huge amounts of CO2 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 CO2 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 CO2 bubbles is used to transport CO2-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 CO2 gas into tap water. The liquid-phase flow caused by gas-lift effect was strong enough to transport the CO2-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...