Cheg. 641       Advanced Chemical Engineering


Course Title:                                                              Advanced Chemical Engineering

Course code:                                                              Chen.641

Credit hours:                                                                      4

Contact Hours:                                                          4 Hours per week


Course Outlines

Unit Operations - I

Size Reduction: Necessity, Principles, Mechanism and equipments; Generalized crushing law, Rittinger’s law, Kick’s law, Bond’s law; Methods of operating crushers; Size reduction in industries.

Screening: Standard screen, screen efficiency, capacity of screen & effectiveness; Ideal & actual screen; Screen analysis and equipments for industrial screening. 

Mixing and Agitation: Objectives and requirements; Types of mixing and agitation equipments.

Unit Operations - II

Sedimentation: Motion of a particle through a fluid - terminal velocity; Stokes’ Equation; experimental study of sedimentation (jar method); Factors influencing rate of settling; Kynch theory; Expression for thickener area, flocculation, pH and Zeta potential.

Filtration: Theory of filtration; Cake filtration; Compressible filter cake- Filter aid-Washing of filter cake. Centrifuging: Theory of centrifugation; Centrifugal separation; Types of centrifugals.

Miscellaneous Separation Process: Separation of Gases - Cyclic separators. Membrane separation process: Ultra-filtration and Reverse osmosis.

Unit Operations - III

Gas Absorption:  Comparison of absorption and distillation; Conditions of liquid-gas equilibrium; Criteria for gas absorption. Packed and plate columns; Plate and packed tower and its merits.

Humidification and Water Cooling: Humidification terms: Wet bulb temperature, adiabatic saturation temperature and humidity data for air water system; Determination of humidity, humidification and dehumidification.

Humidity charts; Equipments and their design; Humidity control in Leather processing and other industries.

Evaporative cooling; Cooling tower and Spray pond.

 Unit Operations - IV

Evaporation: Types of evaporators - Horizontal and vertical tube evaporators; Forced circulation evaporations; Entrainment separators (upturned, deflector type, tangential type); Effect of scale formation; Multiple effect evaporators.

Distillation: Boiling and Distillation;Vapor-liquid equilibria - Rault’s law and Henry’s law; Azeotropic mixtures, flash distillation, steam distillation, vacuum distillation and fractional distillation; Plate columns (Bubble cap, Sieve plate and Valve plate).

Extractions: Liquid equilibria; Extraction with reflux and agitation equipment; Continuous contact equipment, agitator extractors, packed spray extractors and Leaching. Flow sheets of solid-liquid extraction; Continuous leaching; Counter current extraction.

Unit Operations-V

Drying: General Principles and mechanism of drying; Estimation and rate of drying (Constant & falling rate period, factors affecting drying); Drying equipments - Tray dryers, Rotary dryers, Single Drum dryer and Spray dryers; Design and performance of industrial dryers for leather, leather chemicals and for other industries.

Crystallization: Growth of Crystal; Saturation, Nucleation, Supersaturation (Mier’s theory), Caking of crystals, effect of impurities; Classification of crystallizers, Agitated tank, Swenson walkers, Krystal, Oslo and Continuous vacuum crystallizers.

Diffusion: Concept of diffusion on Leather; Gas-liquid / vapor-liquid equilibrium; Continuous contact and stage-wise contact equipments.


1. J.M.Coulson, J.F.Richardson: Chemical Engineering, Vol. I-III, Pergamon press, Oxford (1968).

2. Unit Operations in Chemical Engineering, Warner Mcabe, Julian.C. Smith and Peter Harriot,  

    McGraw-Hill, 7th edition (2004).

3. Principles of Unit Operations, A S Foust, L A Wenzel, CW Clump, L.Mans and L.B.Anderson,  

    John Wiley and Sons, Inc., NY (1960).

4. Introduction to Chemical Engineering, Walter L Badger and Julius T Banchero, McGraw-Hill

    book Co., Inc., NY. (1955).

5. Unit operation in Cane Sugar Production, John H. Payne, Elsevier Science Ltd., (1988). 

6. Chemical Engineers’ Handbook, Perry and Green, McGraw-Hill Book Co., NY (1997).

7. Chemical Technology, F.A. Henglein, Pergamon press Ltd., (1969).

8. Introduction to Chemical Engineering, Walter L. Badger and Julius T. Bandchero, McGraw-Hill

    Book Co., Inc., NY (1955).