2601 二重管型ノズルを用いた高圧水中でのCO_2スラリー放出実験(S31-1 温室効果ガス排出抑制技術(1),21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

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Ocean storage of carbon dioxide (CO_2) is one of greenhouse gas control technologies, where CO_2 is captured from the flue gas of fossil fuels and stored on deep seafloor below the depth of 3500m. The authors developed a double-tube nozzle for an offshore CO_2 releasing system, where a mixture of liquid CO_2 and dry ice, CO_2 slurry, should be released from the inner tube of the nozzle while liquid CO_2 is released from the outer nozzle. CO_2 slurry releasing experiments using a slurry injection unit were carried out to demonstrate the effectiveness of the double-tube nozzle. CO_2 slurry was prepared by injecting liquid CO_2 into dry ice powders in a chamber of the injection unit, and successfully released into water at 5MPa. Then, the nozzle shape and slurry injection rate were improved to make CO_2 slurry drops. CO_2 slurry drops were formed by extruding slurry column from the nozzle followed by instantaneous stopping of slurry. injection.
社団法人日本機械学会の論文
2008-08-02