ガスハイドレートを利用した海底下二酸化炭素貯留の経済性評価

DOI NDLデジタルコレクション Web Site Web Site 被引用文献2件 参考文献33件
  • 乾 正幸
    東京大学新領域創成科学研究科環境システム学専攻
  • 佐藤 徹
    東京大学新領域創成科学研究科環境システム学専攻

書誌事項

タイトル別名
  • Economical feasibility study on CO<SUB>2</SUB> sequestration in the form of gas hydrate under seafloor
  • ガスハイドレート オ リヨウ シタ カイテイ カ 2サンカタンソ チョリュウ ノ ケイザイセイ ヒョウカ

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抄録

A new concept for CO2 geological sequestration is proposed as one of promising countermeasures against the global warming. For general geological sequestration technologies, there are still some issues we need to tackle, such as the shortage of possible sites to sequestrate, environmental risks due to leakage, and costs. In order to solve these problems, we propose a system to sequestrate a large amount of CO2 in the form of gas hydrate under the seafloor safely. In this system, we capture a mixture of CO2 and N2 from the flue gas exhausted from a coal-fired power plant and inject the mixture into marine sediments, where pressure is high enough and temperature is low enough to form hydrates. Besides, by using the CO2 + N2 mixture gas, we can reduce the cost and avoid the blockage by the hydrates in marine sediments. In this work, we assessed the potential amount of sequestrated CO2 and the cost of this system. From the results, the amount of CO2 that can be sequestrated offshore Japan by this system was estimated to be twice and the sequestration cost was reduced by 15%, compared with those of CO2 aquifer storage.

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