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Experimental investigation and modeling on the dissociation conditions of methane hydrate in clayey silt cores
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  • Changhong Yu,
  • Baojiang Sun,
  • Tangyang Yang,
  • zhiyuan wang,
  • Yonghai Gao,
  • Litao Chen
Changhong Yu
China University of Petroleum Huadong

Corresponding Author:[email protected]

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Baojiang Sun
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Tangyang Yang
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zhiyuan wang
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Yonghai Gao
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Litao Chen
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The dissociation conditions of hydrate in clayey silts are of great significance for its efficient production. In this work, the dissociation conditions of methane hydrate in clayey silt cores were experimentally measured by step-heating method. Various cores including quartz powder, montmorillonite and South China Sea sediments were used for investigation. The results showed that the dissociation temperatures of methane hydrate in clayey silt cores depressed compared to bulk hydrate. In comparison to grain size, salinity and lithology had a more significant influence on the equilibrium temperature depression. A water activity meter was used to measure the water activity in clayey silt cores. The influence of salt and minerals on water activity was investigated. By combining the measured water activity data with the Chen-Guo model, a novel water activity measurement method (WAM) for the hydrate dissociation conditions prediction was proposed. The predicted results are in good agreement with the experimental data.
18 Nov 2021Submitted to AIChE Journal
19 Nov 2021Submission Checks Completed
19 Nov 2021Assigned to Editor
17 Dec 2021Reviewer(s) Assigned
30 Mar 2022Editorial Decision: Revise Minor
23 Apr 20221st Revision Received
24 Apr 2022Submission Checks Completed
24 Apr 2022Assigned to Editor
16 May 2022Editorial Decision: Accept
Sep 2022Published in AIChE Journal volume 68 issue 9. 10.1002/aic.17778