Table 4: Operating conditions used in the simulations.

Initial pressure (P0)
Bed 5.0 105 Pa
Tank 1.0 105 Pa
Initial temperature 298 K
Initial CH4 mole fraction
In the bed 0.5
In the tank 0.0 (pure hydrogen)
Bed length (L) 2.0 m
Interparticle porosity (ϵ) 0.4