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Dissolution mechanisms of CO_2 hydrate droplets in deep seawaters

机译:CO_2水合物液滴在深海水中的溶解机理

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摘要

Carbon dioxide dissolution at intermediate ocean depths was studied using physical and mass transfer models. Particle density and hydrate layer thickness were determined using existing field data. Pseudo-homogeneous and heterogeneous mass transfer models were proposed to study the dissolution process. Pseudo-homogeneous models do not seem to represent the dissolution process well. Although heterogeneous models interpret the physical behavior better, unresolved issues related to hydrate dissolution still remain. For example, solid hydrate forms on one side of the hydrate film while it dissolves on the other. Dissolution is a complex process that comprises at least two sequential steps. The global process is controlled by mass transfer inside the hydrate layer or by a dissolution reaction at the hydrate-water interface.
机译:使用物理和传质模型研究了海洋中间深度处的二氧化碳溶解。使用现有的现场数据确定颗粒密度和水合物层厚度。提出了伪均质和异质传质模型来研究溶解过程。伪均质模型似乎不能很好地表示溶解过程。尽管异构模型可以更好地解释物理行为,但与水合物溶解有关的未解决问题仍然存在。例如,固体水合物在水合物膜的一侧形成,而在另一侧溶解。溶解是一个复杂的过程,至少包括两个连续步骤。整体过程由水合物层内部的质量转移或水合物-水界面的溶解反应控制。

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