Question: Convective Mass Transfer - One-way diffusion Methane gas is diffusing in a straight tube 0.1 m long containing at 298 K and a total pressure

Convective Mass Transfer - One-way diffusion

Methane gas is diffusing in a straight tube 0.1 m long containing at 298 K and a total pressure of 1.01325 x 105 Pa.

The partial pressure of CH4 is 1.400 x 104 Pa at one end and 1.333 x 103 Pa at the other end.

Helium is insoluble in one boundary, and hence is nondiffusing or stagnant.

The diffusivity is 0.675 cm2 /sec at 25 0C.

Calculate the flux of methane at steady state. (Sol.: NA=3.74 x 10-6 kgmol A/s. m2 )

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