Finite element model for charge and discharge cycle of activated carbon hydrogen storage

摘要: Abstract One of the main challenges to introduce hydrogen on energy market is improve on-board storage and develop more efficient distribution technologies increase amount stored gas while lowering pressure. The physisorption activated carbons (AC) being investigated as a possible route for storage. objective this work study performance adsorption-based units from "systems" point view. A realistic two-dimensional axisymmetric geometric model which couples mass, momentum balances established based thermodynamic conservation laws using finite element method implemented in COMSOL Multiphysics™. We consider charging discharging unit at rated pressure 9 MPa, an initial temperature 302 K. results are compared with experimental data obtained Hydrogen Research Institute University Quebec Trois-Rivieres. tank cooled by ice water. show that both simulated variations temperatures during charge discharge processes good agreement data. central region higher than those entrance near wall end time they lower and near time. velocities largest entrance, decrease gradually along axis tank. Owing thermal effects, larger flow rates result less adsorption condition same Hence measures increasing heat transfer should be adopted, such conductivity bed. From view capacity, it therefore realize rapid hydrogenation, conducive use systems carbon adsorption.