Adsorption hydrogen storage at cryogenic temperature – Material properties and hydrogen ortho-para conversion matters

摘要: Abstract A complete set of thermo-physical properties a metal-organic framework (MOF) at close to working conditions cryogenic adsorption hydrogen storage (cAH 2 -storage) was measured and is presented in this study. Measured particle bulk material specific heat capacities thermal conductivities showed significant dependencies on the conditions. The temperature-dependent conversion between H isomers enhanced by catalytic activity cAH -storage material. Hydrogen ortho- para-isomer related were considered as important. an excess density bulk-level, exceeding that MOF-5 powder beds. novel thermal-hydraulic model developed, including: adsorption; real gas behavior; compression effects; isomer concentration time-dependent boundary Additional ortho-para inlet region implemented. To knowledge authors, first time all these effects have been simultaneously compared against measurements including charging, discharging dormancy results indicate nearly instantaneous takes place region. Moreover, total stored undergoes conversion. It concluded -storages containing materials, such MOFs activated carbon, has impact energy balance must be analyses.