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1,3-dioxolane (DIOX) concentration impacts natural gas hydrate storage. Optimal DIOX-CH4 hydrate storage efficiency occurs at 5.56 mol.% under mild conditions, suggesting practical applications for energy transport.

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Area of Science:

  • Energy Science
  • Materials Science
  • Chemical Engineering

Background:

  • Natural gas hydrates offer a sustainable energy source but face storage and transport challenges.
  • The influence of 1,3-dioxolane (DIOX) concentration on hydrate storage efficiency is under-explored.
  • Understanding these factors is crucial for developing efficient natural gas storage solutions.

Purpose of the Study:

  • To investigate the regulatory mechanism of 1,3-dioxolane (DIOX) concentration on the gas storage efficiency of DIOX-CH4 hydrate.
  • To determine the optimal DIOX concentration for maximizing hydrate storage capacity and growth rate.
  • To evaluate the effects of temperature and pressure on DIOX-CH4 hydrate performance.

Main Methods:

  • Molecular dynamics simulations were used to analyze DIOX-CH4 hydrate formation.
  • The study examined the relationship between DIOX concentration and hydrate growth rate.
  • Gas storage capacity (GSC) was assessed based on cage occupancy, particularly the 512 and 51264 cages.

Main Results:

  • DIOX-CH4 hydrate growth rate initially increased with DIOX concentration, peaking at 5.56 mol.%, then decreased.
  • Gas storage capacity (GSC) decreased with increasing DIOX concentration, primarily influenced by 512 cage occupancy.
  • Optimal storage efficiency was observed at 270 K and 1 MPa for DIOX-CH4 hydrate at 5.56 mol.% DIOX.

Conclusions:

  • DIOX concentration significantly regulates DIOX-CH4 hydrate growth and gas storage capacity.
  • A DIOX concentration of 5.56 mol.% shows promise for efficient natural gas storage and transportation.
  • DIOX-CH4 hydrate offers a viable solution for natural gas storage under mild conditions, indicating potential for practical application.