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Updated: Mar 27, 2026
08:46
Methane Hydrate Crystallization on Sessile Water Droplets
Published on: May 26, 2021
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Carbon dioxide induced bubble formation in a CH4-CO2-H2O ternary system: a molecular dynamics simulation study
K S Sujith1, C N Ramachandran1
1Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667 India. ramcnfcy@iitr.ac.in.
Physical Chemistry Chemical Physics : PCCP
|January 15, 2016
Summary
Carbon dioxide aids methane hydrate extraction by promoting methane bubble formation. Higher CO2 concentrations enhance this process, reducing methane accumulation in the liquid phase during hydrate decomposition.
Area of Science:
- Geochemistry
- Materials Science
- Chemical Engineering
Background:
- Methane hydrate extraction often involves replacing methane with carbon dioxide, forming a complex ternary solution.
- Understanding the behavior of dissolved gases in these solutions is crucial for optimizing extraction efficiency.
Purpose of the Study:
- To investigate the role of carbon dioxide (CO2) in the nucleation and evolution of methane (CH4) bubbles during hydrate decomposition.
- To analyze the molecular interactions and structural changes within a CH4-CO2-H2O ternary system at varying CO2 concentrations.
Main Methods:
- Classical molecular dynamics simulations were employed to model the ternary solution.
- Analysis included bubble nucleation, composition, interfacial structure, and surface tension effects.
Main Results:
- Carbon dioxide accelerates methane bubble nucleation and formation.
- In high CO2 concentration solutions, mixed CH4-CO2 gas bubbles are formed.
- CO2 accumulates at the bubble-water interface, reducing surface tension and increasing bubble stability.
- Increased CO2 concentration facilitates methane removal from the liquid phase.
Conclusions:
- CO2 plays a significant role in enhancing methane release from hydrates by promoting bubble formation and stability.
- The findings suggest that optimizing CO2 concentration can improve the efficiency of methane hydrate extraction processes.
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