IRMOF-20: Extending Liquid Hydrogen Storage to 221 Days

Hydrogen Fuel News USA

Overview

A UNIST-led research team has modeled a method to extend liquid hydrogen storage duration from 64 to 221 days using IRMOF-20. By integrating porous metal-organic frameworks into cryogenic tanks, the system retains approximately 97% of volumetric capacity while significantly slowing boil-off.

In Depth

Key Findings

Modeling conducted by a research collaboration led by the Ulsan National Institute of Science and Technology (UNIST) indicates that integrating porous metal-organic frameworks (MOFs) within cryogenic liquid hydrogen tanks can substantially reduce boil-off. Specifically, the use of IRMOF-20 may extend the storage duration of liquid hydrogen to 221 days, compared to 64 days for a conventional vacuum-insulated tank holding neat liquid hydrogen.

Technical Details

The study, referenced in an Institut Laue-Langevin news release, compared two primary configurations:

• A conventional vacuum-insulated tank containing only neat liquid hydrogen.
• A cryogenic volume containing a porous solid phase (IRMOF-20) integrated within the tank.

Under mid-vacuum insulation conditions and the specific parameters set for the simulations, the IRMOF-20 system demonstrated a significant increase in storage longevity while retaining approximately 97% of the volumetric capacity.

Background & Context

The research focuses on the challenge of hydrogen boil-off in cryogenic storage. By utilizing the cryo-adsorption properties of MOFs, the team modeled a way to stabilize the liquid hydrogen phase more effectively than traditional vacuum insulation alone.

Significance & Outlook

The ability to extend storage duration from 64 to 221 days without a significant loss in volumetric capacity suggests a potential improvement in the long-term viability of liquid hydrogen transport and storage. This modeling provides a theoretical basis for integrating porous materials into cryogenic infrastructure to mitigate fuel loss.

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