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Table 2.

Main parameter values used in computations [10].

Input boundary conditions
T i = 573 K Initial bed temperature
T f = 300 K Cold fluid temperature
P i = 1 MPa Supply pressure
h = 103 W/m2 K Heat transfer coefficient

Properties of metal alloy
ρ m = 1945 kg/m3 Metal density
Cp MH = 1545 J/kg K Specific heat of metal
λ eff = 0.48 W/m K Effective thermal conductivity
ε = 0.77 Porosity
E a = 130 kJ/mol H2 Activation energy
ΔS = 135.6 J/mol H2 K Entropy of formation
ΔH = 75 kJ/mol H2 Enthalpy of formation

Properties of hydrogen
λ g = 0.127 W/m K Thermal conductivity of hydrogen
Cp g = 14 283 J/kg K Specific heat of hydrogen
ρ g = 0.0838 kg/m3 Hydrogen density

R = 8.314 J/mol K Universal gas constant
k c = 1011 s−1 Reaction constant

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