Methane storage in dry water gas hydrates

Area of Science:

• Materials Science
• Chemical Engineering
• Energy Storage

Background:

• Methane storage is critical for natural gas applications.
• Existing storage methods face challenges in volumetric density and efficiency.
• Developing novel materials for efficient methane storage is an ongoing research area.

Purpose of the Study:

• To evaluate dry water as a material for methane storage.
• To determine the methane storage capacity and uptake rate of dry water.
• To assess the potential of dry water in meeting energy storage targets.

Main Methods:

• Utilizing silica-stabilized dry water, a powder composed of 95% water by weight.
• Investigating methane storage in hydrate form under specific pressure and temperature conditions (2.7 MPa and 273.2 K).
• Measuring methane uptake kinetics and final storage capacity.

Main Results:

• Dry water achieved a methane storage capacity of 175 volumes of standard temperature and pressure (STP) methane per volume.
• This capacity is comparable to the Department of Energy's volumetric target for methane storage.
• Fast methane uptake was observed, reaching 90% saturation in 160 minutes without mixing.

Conclusions:

• Dry water demonstrates significant potential as a high-capacity methane storage material.
• The material's properties, including its high surface-to-volume ratio, facilitate rapid gas adsorption.
• Dry water offers a promising avenue for advancing methane storage technologies.