Storage of cryo-compressed hydrogen in flexible glass capillaries

• Flexible glass capillaries were used for hydrogen storage at pressures above 100 MPa.
• Relatively high gravimetric and volumetric capacities of the capillaries were obtained.
• The developed technology of hydrogen storage can be applied to other gases.
• Capillaries may serve as a pipe for the transportation of gases over long distances.

We present the results of the theoretical calculations and the corresponding experiments with compressed hydrogen storage in flexible glass capillaries both at room and liquid nitrogen temperatures. It was demonstrated that the strength of produced quartz capillaries can be high enough to withstand the internal hydrogen pressure up to 233 MPa and capillary vessels can have relatively high volumetric and gravimetric capacity.