𝐽 ) -1 Here, 𝜇 is the dynamic viscosity, 𝐵 0 e the effective permeability as well as 𝐷 𝑖𝑗 e and 𝐷 𝑖K e the effective binary and Knudsen diffusion coefficient, respectively. Because of the high temperature and the moderate pressure, the ideal gas law can be applied. Note that in our previous work the binary friction model is compared to the dusty gas and Wilke-Bosanquet model under steady-state and dynamic conditions and is revealed to be the most general representation of the transport phenomena in porous catalysts under methanation conditions .