Chemical Engineering - Chemical Reaction Engineering - Discussion
Discussion Forum : Chemical Reaction Engineering - Section 1 (Q.No. 20)
20.
'If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the
Discussion:
3 comments Page 1 of 1.
KRR said:
4 years ago
Knudsen diffusion, or Knudsen flux, occurs when the mean pore diameter of the porous medium is smaller than the mean free path of the gas particles. This type of diffusion occurs in low permeability porous media, which have small pore radii, and at low gas pressures, when the mean free path becomes large.
(1)
Ashish said:
6 years ago
The velocity will be calculated from the kinetic theory of gases, which would drive to, Vrms= √ (8*R*T/π/M).
(1)
Jomson Mathachan said:
6 years ago
Knudsen Diffusivity directly proportional to square root of Temperature.
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