It is desired to increase by \(50 \%\) the oxygen flux in the process described in Example 1.22 by changing the pore size while maintaining all the other conditions unchanged. Calculate the required pore size. Remember to calculate the new value of the Knudsen number to corroborate that you have used the correct set of equations to relate flux to pore size.

Data From Example 1.22:-

Repeat Example 1.21 for an average pore diameter of 0.3 μm, while the porosity and tortuosity remain unchanged. At the temperature of 293 K and pressure of 0.1 atm, DAB = 2.01 cm2/s.

Example 1.21:-

A mixture of O2 (A) and N2 (B) diffuses through the pores of a 2-mm-thick piece of unglazed porcelain at a total pressure of 0.1 atm and a temperature of 293 K. The average pore diameter is 0.1 μm, the porosity is 30.5%, and the tortuosity is 4.39. vEstimate the diffusion fluxes of both components when the mole fractions of O2 are 80 and 20% on either side of the porcelain.