عمليات إنتقال المادة Mass Transport Operations

Topics covered 1. Concept of mass transfer operations and its role in separation processes (5 classes). 2. Molecular diffusion ; General law for diffusion and convection, equimolar counter diffusion, transfer across stagnant layer, effect of changing area (7 classes) 3. Diffusion coefficient estimation in gases and liquid , diffusion in solid ( permeate membrane , packed bed, catalyst & capillary ) (7 classes) 4. Numerical methods for steady state molecular diffusion in two dimension. (2 classes) 5. Convective mass transfer , general equation ,mass transfer coefficient concept , dimensionless analysis ,mass transfer correlations ,analogy between heat, mass and momentum transfer (9 classes) 6. Interface mass transfer ; Two resistance theory, Relationship between overall and individual mass transfer coefficients (5 classes) 7. Mass transfer equipment ; Spraying column ,Bubbling column and packed bed column ( properties, loading ,flooding, channeling) (3 classes) 8. Design of Packed bed absorber ( e.g. for continuous mass transfer operation ion – exchange , adsorber ) (5 classes) 9. Lab Experiments: Experiment 1: Cooling Tower (mass and energy balance, driving force, number of transfer units, mass transfer coefficients). Experiment 2: Drying (drying rate curves and mechanism, study influence of particle size, velocity and air temperature on drying). Experiment 3: Absorption (rate of absorption of carbon dioxide into water, height of packing, observe hydraulics including loading and flooding points). Experiment 4: Diffusion (diffusion coefficient of a solute in water, diffusion coefficient of a gas by evaporation from a liquid).