Why are volumetric capacity FOMS important?

Volumetric capacity FOMs are also crucial and are becoming increasingly emphasized for vehicular applications due to the importance of keeping hydrogen storage compact and maintaining the current features that petroleum-based vehicles allow for, such as passenger and cargo-space requirements.

What does volumetric capacity mean?

The quantity determined in Equation (3) is referred to herein as the “stored amount” or the “volumetric capacity” and represents the ultimate amount of H 2 contained within the confines of a pressure vessel containing adsorbent (for direct comparison to the pure compression density of H 2 ).

How does pressure affect storage capacity?

At high enough pressures, the net capacity will always reach neg-ative values. For storage, this is offset by the counter concerns of the weight and volume of the vessel as the pressure requirement is increased, as well as the energy and cost required to compress the gas.

How can volumetric capacity be increased?

The volumetric capacity of a material can be increased by improving its volumetric surface area, which is defined as the surface area per unit volume, for example, in units of m 2 cm −3 or m 2 mL −1. The dependence of absolute volumetric H 2 uptake on volumetric surface area, for various MOFs, is shown in Fig. 2. Fig. 2.

What is a volumetric capacity determination?

Volumetric capacity determinations ultimately involve an accounting of hydrogen in a storage material, vessel or system and a separate quantification of the volume of said material, vessel or system then dividing the former by the latter:

What is the difference between gravity and volumetric capacity?

Gravimetric capacity determines the weight of a storage tank required to store a given amount of H 2. Volumetric capacity, on the other hand, determines the volume of the tank and it is defined, for adsorbents, as the amount of H 2 adsorbed per unit volume, for example, as g H 2 L −1.