Assignment:
Wilke and Hougan (1945) reported the mass transfer in beds of granular solids. Air was blown through a bed of porous celite pellets wetted with water, and by evaporating this water under adiabatic conditions, they reported gasfilm coefficients for packed beds. In one run, the following data were reported:
Effective particle diameter 5.71mm
gas stream mass velocity 0.816kg / m2 -s
temperature at surface 311 K
pressure 97.7 kPa
kG 4. 415 x 10-3 kmol/m2 -s -atm
With the assumption that the properties of the gas mixture are the same as those of air, calculate the gas-film mass-transfer coefficient using equation (2- 90) and compare the result with the value reported by Wilke and Hougan.
Provide complete and step by step solution for the question and show calculations and use formulas.