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Interfacial equilibrium and mass transfer from liquid CO_2 disks through hydrate films

机译：液态CO_2盘通过水合物膜的界面平衡和传质

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摘要

Dissolution behavior of CO_2 in water is a key factor in the ocean sequestration of CO_2 in deep sea. Studies have been reported on the mass transfer of CO_2 into water through interfacial hydrate layer in convective conditions. Coupled with convective flows, such studies provide limited information on the mass transfer resistance at the interface. In the present study, liquid CO_2 was injected into stagnant water to form disks at the center of a disk-like void in a deep sea condition (278 K, 20.0 MPa) and the decreasing radii of disks were photographed with a digital camera. The radius change of the CO_2 disk was compared with moving boundary numerical solutions for diffusive dissolutions. The water side of the interfacial hydrate layer was found in equilibrium with aqueous phase and the slower dissolution in hydrate forming conditions is due to the decreased solubility. These findings are in accordance with previous studies in convective conditions.
机译：CO_2在水中的溶解行为是深海中CO_2螯合海洋的关键因素。关于在对流条件下通过界面水合物层将CO_2传质到水中的研究已有报道。结合对流流动，此类研究提供了关于界面传质阻力的有限信息。在本研究中，在深海条件下（278 K，20.0 MPa），将液态的CO_2注入停滞的水中以在圆盘状空隙的中心形成圆盘，并用数码相机拍摄圆盘减小的半径。将CO_2圆盘的半径变化与扩散扩散的移动边界数值解进行了比较。发现界面水合物层的水侧与水相平衡，并且在水合物形成条件下较慢的溶解是由于溶解度降低。这些发现与以前在对流条件下的研究一致。

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  • 来源
    《Energy Conversion & Management》 |2010年第4期|P.710-713|共4页
  • 作者

    Myoung Do Seo; Sang Ho Seo; Jeong Won Kang; Chul Soo Lee;

  • 作者单位

    Department of Chemical & Biological Engineering, Korea University, Seoul, Republic of Korea;

    Department of Chemical & Biological Engineering, Korea University, Seoul, Republic of Korea;

    Department of Chemical & Biological Engineering, Korea University, Seoul, Republic of Korea;

    Department of Chemical & Biological Engineering, Korea University, Seoul, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    hydrate film; mass transfer; solubility; liquid CO_2;

    机译：水合膜传质溶解度液态CO_2;

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