Improvement of hydrogen storage by adsorption using 2‐D modeling of heat effects

Hydrogen storage systems using modified sorbents for application in automobile manufacturing

“…10and 11 also show that the greatest increase was at the center of the tank T 1 , followed by that of half the wall T 2 , at the bottom T 3 and at the end near the wall T 4 . The temperature profile of the reservoir shows the maximum of the temperature in the center [14,25]. The same results were observed with the other modified samples (AC35 þ Ni, i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 3 7 ( 2 0 1 2 ) 1 0 1 7 2 e1 0 1 8 1 AC35 þ Ni þ MM), but here are applied only these of AC35 þ Ni þ La, because they most clearly demonstrate the differences in the two mechanisms of hydrogen storage.…”

“…The target of the American Department of Energy (DOE) for the year 2015 is a refueling time of less than 5 min [13]. The studies of Lamari and Delahaye showed that the released heat has a high impact on the filling time, when large amounts of material are tested under engineering conditions [14,25].…”

CFD simulation for charge–discharge cycle of cryo-adsorptive hydrogen storage on activated carbon

“…Delahaye et al [19] considered that the effective thermal conductivity was composed of a stagnant term and a dynamic term, and the axial and the radial thermal conductivities were taken into consideration respectively. Furthermore, we should consider the contribution of the adsorbed hydrogen to the effective thermal conductivity in the future model.…”

On the effect of process temperature on the performance of activated carbon bed hydrogen storage tank

“…We showed that although the absolute performance of packed bed storage tanks are improved at low temperature, the limitation in tank capacity due to the heating effect is enhanced and should be taken into account in tank design if cryogenic charging conditions are adopted. We also show that for the investigated AC material, the limitation in the tank capacity is mainly due to the decrease of the amount of hydrogen stored in gaseous form and not to the decrease of the adsorption capacity as was suggested by some authors [33,34]. As a matter of fact, under liquid nitrogen temperature conditions, the adsorbed quantity becomes quite small with respect to the amount of hydrogen in the feed gas and the variation of adsorption capacity with the temperature remains quite moderate.…”