Distillation
Unit 1 Distillation Contents 1. Concept of diffusion. (definition) 2. Fick’s law of diffusion. 3. Steady state diffusion through a stagnant gas film. 4. Steady state equimolar counter diffusion. Learning Objective/ Key learning State the role of diffusion in the given mass transfer. ►What is Diffusion? ►Define Fick’s Law. ►Derive the equation for Steady state diffusion through a stagnant gas film. ►Derive the equation for Steady state equimolar counter diffusion. WHAT ID DIFFUSION? ►Diffusion is the tendency of molecules to move toward areas of lower concentration until the concentration is uniform throughout. It is movement of an individual component through a mixture from a region of higher concentration to region of lower concentration at fixed temp & press with or without the help of external force. ►FICK’S LAW OF DIFFUSION : ...