Study on dissolution process of liquid CO2 into water under high pressure condition for CCS
Study on dissolution process of liquid CO2 into water under high pressure condition for CCS
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CCS高压条件下液态CO2溶解于水中的过程研究
DOI：
10.1016/j.egypro.2017.03.1687
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Chikahisa Murakami
中科院分区：
文献类型：
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作者：
Xiao Ma;Yutaka Abe;Akiko Kaneko;Shuhei Fujimoto;Chikahisa Murakami
本研究的目的是阐明深海高压下液态CO2的溶解现象，以及CO2水合物形成时水-液界面附近的CO2浓度分布。首先，构建了可以从各个角度观察的可视化单元。其次，利用图像处理技术计算了气态CO2、液态CO2和溶解水的体积变化，计算了CO2的传质系数和溶解度随时间的变化规律。结果表明，CO2的传质系数随时间的延长而减小，CO2的溶解度随时间的延长而增加。最后，将本研究计算的CO2溶解度与前人的研究结果进行了比较，结果表明与前人提出的温度低于10℃的水合物生成条件值吻合较好。
The objective of the present study is set as to clarify the dissolution phenomena of liquid CO2in the high pressure corresponding to deep-ocean, and CO2concentration profile near the water-liquid CO2interface when CO2hydrate formation. First of all, visualization unit is constructed which can be observed from all angles. Second, mass transfer coefficient and the solubility of CO2with time were calculated via volume change of gas CO2, liquid CO2and dissolution water by using image processing. As a result, CO2mass transfer coefficient decreased with time, and solubility of CO2increased with time. Finally, CO2solubility calculated by the present study was compared to a previous study, and its indicated good agreement with the previous value of hydrate formation condition which the temperature under 10 °C.