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Updated: Jun 20, 2026
08:46
Methane Hydrate Crystallization on Sessile Water Droplets
Published on: May 26, 2021
Molecular dynamics study of thermal-driven methane hydrate dissociation
Niall J English1, Gráinne M Phelan
1The SEC Strategic Research Cluster and the Centre for Synthesis and Chemical Biology, School of Chemical and Bioprocess Engineering, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland. niall.english@ucd.ie
The Journal of Chemical Physics
|August 28, 2009
Summary
This study used molecular dynamics to simulate methane hydrate breakup. Dissociation rates depend on temperature, size, and methane concentration, with methane diffusion being a key limiting factor.
Area of Science:
- Physical Chemistry
- Materials Science
- Computational Science
Background:
- Methane hydrates are crystalline solids crucial for energy storage and geological processes.
- Understanding hydrate dissociation is vital for safety and resource management.
Purpose of the Study:
- Investigate thermal-driven breakup of methane hydrate nanocrystallites and interfaces.
- Determine factors influencing hydrate dissociation rates.
Main Methods:
- Employed nonequilibrium molecular dynamics simulations.
- Simulated spherical nanocrystallites (18-21 Å radii) and planar interfaces in liquid water (280-340 K).
- Estimated melting temperatures and analyzed dissociation kinetics.
Main Results:
- Dissociation rate strongly correlates with temperature and overtemperature relative to melting.
- Breakup is size-dependent for nanocrystals.
- Methane diffusion into surrounding water limits the overall breakup rate.
- Planar hydrate dissociation shows slight differences based on methane composition.
Conclusions:
- Developed a coupled mass and heat transfer model explaining observed dissociation behaviors.
- Model distinguishes thermal driving force and methane diffusion as key rate-controlling factors.
- Provides insights into methane hydrate stability and dissociation mechanisms.
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