How Does Knudsen Diffusion Differ from Bulk Diffusion?
In bulk diffusion, the movement of gas molecules is influenced primarily by collisions with other gas molecules. In contrast, during Knudsen diffusion, the gas molecules primarily interact with the walls of the pores rather than with each other. This difference in interaction leads to a unique diffusion behavior that is governed by the Knudsen equation: DK = (2/3) * (r * sqrt((8 * R * T) / (π * M))) where DK is the Knudsen diffusion coefficient, r is the pore radius, R is the gas constant, T is the temperature, and M is the molar mass of the gas.
