3622 ハイドレート膜に被覆されたCO_2液滴の溶解に対する流れの影響(S51 温室効果ガス排出抑制技術)

概要

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The diameter of dissolving CO_2 drops with CO_2 hydrate films wider conditions with slight water flow was measured and compared with that predicted from a dissolution model including flow effect to investigate the effect of water flow on the dissolution of CO_2 drops stored on the deep sea-floor for ocean storage of CO_2. The dissolution of CO_2 drops was enhanced by water flow. The dissolution rate almost agreed with the model during the period that the amount of dissolved CO_2 was relatively small while an increase in dissolved CO_2 with both of time passing and an increase in flow velocity provided lower dissolution rate than that predicted from the model. The measurement of pH showed the dissolution of CO_2 drops lowered pH near the drops, and the pH lowering was enhanced by an increase in flow velocity. These results suggest that a lowering of the difference of CO_2 concentration between on the surface of the drop and nearby would provide lower dissolution rate than that predicted from the model.
社団法人日本機械学会の論文
2005-09-18