PM6501 - MASS TRANSFER I (Syllabus) 2013-regulation Anna University

PM6501 - MASS TRANSFER I (Syllabus) 2013-regulation Anna University

PM6501

MASS TRANSFER I

 LPTC

3003

OBJECTIVE:
Students will learn to determine mass transfer rates under laminar and turbulent conditions.

UNIT I

DIFFUSION

9

Diffusion in fluids – Molecular and eddy diffusion – Measurement and calculation of diffusivities – Ordinary diffusion in multi component gaseous mixtures – Diffusion in solids – Molecular and Knudsen diffusion in solids – Theories of mass Transfer –Film theory, penetration theory and surface renewal theories of mass transfer.

UNIT II

INTERPHASE MASS TRANSFER

9

Interphase Mass Transfer – Local and overall mass transfer coefficients – Steady state co current and counter current mass transfer process – Stage and stage efficiencies – Concept of NTU and HTU – Equilibrium and operating lines – JD Factor– Equipments for gas-liquid contact operations – Bubble columns – Tray towers and packed towers.


UNIT III

ABSORPTION

9

Gas Absorption: Principles of absorption and desorption – Selection of solvents for absorption – Tray tower absorber – Absorption factor – Calculation of number of theoretical stages – Murphree efficiency – Point efficiency – Tray efficiency and overall tray efficiency – Calculation of actual number of trays.Packed tower absorber – Tower packing and characteristics – Calculation of NTU, HTU,HETP and height of absorption towers – Absorption with chemical reactions.

UNIT IV

DRYING

9

Drying – Principle and definitions – Estimation of drying rates, drying rate curve – Critical and equilibrium moisture content – Calculation of drying time under constant drying conditions – Different types of dryers.

UNIT V

HUMIDIFICATION AND CRYSTALLIZATION

9

Humidification – Definitions, psychometric charts – Wet bulb temperature – Methods of humidification – Types of cooling towers, spray chambers and spray ponds.Crystallization – Factors governing nucleation and crystal growth – Theory of Crystallization – Classification of crystallizer and their applications – Product size distribution.

TOTAL : 45 PERIODS

OUTCOME:
Students apply the mass transfer concepts in the design of humidification columns, dryers and crystallisers.

TEXT BOOKS:
1. McCabe,W.L., Smith, J.C. and Harriot,P., “Unit Operations of Chemical Engineering”, 6th Edition, McGraw – Hill Book Co., 2001.
2. Treybal, R.E., “Mass Transfer Operations”, 3rd Edition, McGraw – Hill Book Co.,1980.

REFERENCES:
1. Coulson, J.M. and Richardson, J.F., “Chemical Engineering”, Vol.I, II and III,Pergamon Press, 1977.
2. Bennett, C.O. and Myers, J.E., “Momentum, Heat and Mass Transfer”, McGraw Hill Book Company, 3rd Edition, 1983.
3. Christie J. Geankoplis, “Transport Processes and Unit Operations”, 3rd Edition,Prentice Hall of India Pvt. Ltd, 2000.
4. Binay K.Dutta,”Principles of Mass Transfer and Seperation Processes”,PHI Learning Ltd,2013.

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