Under certain conditions, evaporation of a solvent A from freshly-applied paint into air is controlled by diffusion.
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Under certain conditions, evaporation of a solvent A from freshly-applied paint into air is controlled by diffusion. Assume that diffusion occurs through a thin film of stagnant air adjacent to the paint surface. The mole fraction of the solvent at a 2.5 mm distance from the paint surface is 0.08 and the mole fraction gradient is -40 m−1. Temperature and pressure are 20°C and 1 atm, respectively. The diffusivity of solvent in air is 0.091 cm2/s. Determine the mass transfer flux of the solvent at this point.
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Heat And Mass Transfer For Chemical Engineers Principles And Applications
ISBN: 9781264266678
1st Edition
Authors: Giorgio Carta
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