Replacing V p in Equation 1 with the unit cell volume of the MOF/COF, denoted as V U.C. , yields the net uptake, n net . A positive net uptake indicates an improvement in gaseous loading when the adsorbent is added to a storage vessel. Nevertheless, net, absolute, and excess uptakes do not consider the kinetics of the adsorption and desorption processes. An adsorbent with high uptakes may not be practical if it cannot release hydrogen quickly and inexpensively. To address this, usable working capacity (WC ) quantifies the amount of gas that can be withdrawn from the adsorbent in a reasonable time frame. Specifically, WC can be calculated by subtracting the absolute uptake at 5 bar, n abs.