BOARD OF TECHNICAL EDUCATION
DIPLOMA IN CHEMICAL ENGINEERING
CLASS : VI SEMESTER
SUBJECT : MASS TRANSFER - II
SUBJECT CODE : 9CH61 No. of Hrs/week : 04 Hrs
Total No. of Hrs : 64 Hrs
Adsorption & Crystallization
| || |
SUBJECT: MASS TRANSFER – II
SECTION - I
Gas absorption principles – Equilibrium solubility of gases – Ideal and non ideal liquid solution – Henry’s law choice of solvent for absorption – Equilibrium curve and operating line for absorption and desorption system – Tray towers and packed towers for absorption – Absorption factor – Height equivalent of theoretical plate – Statement of equations for calculations of height of absorption tower.
Packed towers construction and operation – Regulator and random packing – Characteristics of packing – Packing supports – Liquid distributor – Entrainment separator – Loading of packed towers.
SECTION – II
Liquid–liquid extraction – Liquid equilibrium – Triangular charts and their use – Liquid system – Choice of solvent for extraction equipments for extraction – Co-current, cross–Current and counter-current extraction (principles only) description of liquid–liquid extraction equipments.
Principles of leaching – Equipment for leaching – Tray thickener - Ballman extractor – Rotocel extractor.
4. ADSORPTION AND CRYSTALLIZATION
Definition – Principles - Physical adsorption – Chemisorptions - Examples – Nature of adsorbents – Adsorption equilibrium – Effect of temperature on adsorption operation.
Principles of crystallization – Solubility – Mechanism of crystallization – Nucleation and crystal growth – Equipment for crystallization – Swenson – Walker crystallizer – Vacuum crystallizer – Evaporative crystallizer - Description and operation of the above equipments.
5. SEPARATION TECHNIQUES
Novel separations (only basic principles and applications) – Super critical fluid extraction – Perevaporation – Membrane separation – Reserve Osmosis – Chromatographic column separation .
1. Unit operations of chemical engineering by W.L.Mc Cabe and J.C. Smith McGraw Hill Book Co.
2. Introduction to chemical engineering by W.L.Badger and J.T.Banchero.
3. Mass transfer operation by R.E.Treybal.
4. Principles of unit operations by A.S.Foustetal.
5. Perry’s Chemical engineer’s hand book.
6. Mass transfer operation by K A Gavhane.
7. Mass transfer operation by Kiran D Patil
SUBJECT: MASS TRANSFER - ii
General Objectives :
On completion of the subject, the student will be able to
Appreciate the need for different mass transfer operations and their significance and relevance in the process industry.
Understand the basic principles and related theory of each of the diffusional separation methods and the equipments and machineries used in each method.
Understand the mechanism of each mass transfer operation and how is carried out in the industry and specific fields of application.
SPECIFIC OBJECTIVES :
1. Explain absorption principles.
2. Explain equilibrium & solubility of gases.
3. Explain ideal and non ideal liquid solutions.
4. State Henry's law.
5. Derive the equation of operating line for absorption operation.
6. State principles involved in choosing suitable solvent for absorption.
7. Explain desorption operation.
8. Explain the construction & working of tray towers and packed towers.
9. Describe the different types of packing materials used in industry.
10. Explain the different methods of packing.
11. Explain the packing support, liquid distributors & entrainment separators.
12. Explain the principles of loading and flooding in packed towers.
13. Explain absorption factor and HETP.
1. Explain the principles of liquid-liquid extraction.
2. Mention the fields of application of liquid-liquid extraction
3. Explain the liquid equilibrium, triangular chart & their uses.
4. State the factors to be considered in choosing suitable solvent for extraction.
5. List the extraction solvents.
6. Classify extraction equipments.
7. Describe the working of Extraction Equipments such as Mixer-settlers for batch &
8. continuous counter current operation, Rotating disc contactor, Spray tower, Packed
9. tower & pulse column extractor.
1. Explain the principles of leaching.
2. Explain leaching equipments like, Bollman extractor, Kennedy extractor, Hildebrandt
3. extractor, Robert diffusion battery, Rotocel extractor & agitated batch leaching vessels.
- Explain the principles of adsorption.
- Explain the types of adsorption.
- Mention the applications of adsorption.
- Explain the nature of adsorbents.
- Explain equilibrium & effect of temperature on adsorption.
- Explain the construction & working of adsorption equipments like fixed bed, vapor phase, moving & fluidized bed absorber.
- Explain the principles of Crystallization.
- Describe the solubility curves.
- Explain saturation and super saturation.
- Explain Mier’s Super saturation theory.
- Explain caking of crystals.
- Explain the construction & working of Agitated- Krystal, Swenson walker & & vacuum crystallizer .
- Explain the Novel separations.
- Explain the basic working principles and applications of Super critical fluid extraction.
- Explain the basic working principles and applications of Per evaporation.
- Explain the basic working principles and applications of Membrane separation.
- Explain the basic working principles and applications of Reverse Osmosis.
- Explain the basic working principles and applications of Chromatographic column separations.