Experimental study of porosity and effective thermal conductivity in packed bed of nano-structured FeTi for usage in hydrogen storage tanks

Scaling up Metal Hydrides for Real-Scale Applications: Achievements, Challenges and Outlook

“…This indicates that the porous baffle helped hydrogen to reach a much more significant fraction of the material. Other examples of self-densification are shown in systems such as the mentioned La 0.9 Ce 0.1 Ni 5 [26,60] and FeTi [61]. Self-densification can lead to significant forces being applied to the tank, as found by Nachev et al [62], which showed that tangential stresses on the cylinder could be as high as 90 MPa.…”

Measurement and the improvement of effective thermal conductivity for a metal hydride bed – a review

“…When the hydrogen capacity was from 0 to saturation, the effective thermal conductivity increased from 0.61 to 1.56 W (m −1 K −1 ). Matsushita et al 38 determined that the effective thermal conductivity of the nano-FeTi packed bed after 25–26 cycles of hydrogen absorption and desorption increased from 0.4 to 1.1 W (m −1 K −1 ) with the increasing hydrogen capacity. Bird et al 39 measured the effective thermal conductivity of Mg 2 FeH 6 + 10 wt% Fe pellet at room temperature, which was 1.72 W (m −1 K −1 ), but the effective thermal conductivity of its fully dehydrogenated state of 2Mg + Fe increased to 2.20 W (m −1 K −1 ).…”