Volume 35 Issue 3
Jun 2021
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CAO Xuewen, YANG Kairan, YANG Jian, TANG Guoxiang, BIAN Jiang. Experiment and Simulation of Carbon Dioxide Hydrate Formation Mechanism under High Pressure[J]. Chinese Journal of High Pressure Physics, 2021, 35(3): 035301. doi: 10.11858/gywlxb.20200632
Citation: CAO Xuewen, YANG Kairan, YANG Jian, TANG Guoxiang, BIAN Jiang. Experiment and Simulation of Carbon Dioxide Hydrate Formation Mechanism under High Pressure[J]. Chinese Journal of High Pressure Physics, 2021, 35(3): 035301. doi: 10.11858/gywlxb.20200632

Experiment and Simulation of Carbon Dioxide Hydrate Formation Mechanism under High Pressure

doi: 10.11858/gywlxb.20200632
  • Received Date: 04 Nov 2020
  • Rev Recd Date: 13 Nov 2020
  • Publish Date: 25 Dec 2020
  • The capturing and storage of green-house gas carbon dioxide are greatly significant to alleviation of green-house effect. The storage method producing carbon dioxide hydrate has advantages of high efficiency, large amount of storage, and easily transporting, etc. In order to provide suggestions for producing CO2 hydrate, experimental and modelling study of CO2 hydrate formation mechanism were initiated in this study. Hydrate formation thermodynamic model was established to give a prediction of temperature and pressure conditions for CO2 hydrate formation and made verification through the experimental data obtained by high-pressure constant reactor system. Hydrate formation kinetic model was built on the assumption that the chemical potential difference serves as the formation drive force. Compared with the experimental results, the model predicted results are agreed in tolerant discrepancy. Moreover, the pressure influence of reactor on CO2 hydrate formation rate was also analyzed. It is indicated that the escalation of pressure can stimulate the formation drive force under lower equilibrium temperature, prompting the gas-liquid mass transferring and production efficiency. Based on the change of electrical resistance ratio obtained from experimental record, CO2 hydrates firstly nucleate and agglomerate at top area of the reactor, additionally close to the wall.

     

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