## PY6304 - MASS TRANSFER OPERATIONS (Syllabus) 2013-regulation Anna University

PY6304

MASS TRANSFER OPERATIONS

LPTC

3003

OBJECTIVES:
• To provide the fundamentals of diffusion and the analogies of mass transfer, leading up to mass transfer coefficients and their use in solving the problems.
• To provide the basic concepts of mass transfer operations for separation processes.
• Apply this knowledge to design a mass transfer equipment

UNIT I

DIFFUSION

9

Diffusion in fluids: Molecular and eddy diffusion measurement and calculation of diffusivities – Ordinary diffusion in multi component gaseous mixtures – Interphase mass transfer – Mass transfer coefficients – Theories of mass transfer.

UNIT II

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.

UNIT III

DISTILLATION

9

Basic concepts of distillation: Vapour-liquid equilibrium – Pressure – Temperature – Concentration – Phase diagram – Isothermal and isobaric equilibrium – Relative volatility– Ideal solutions – Raoult’s law – Deviations from ideality – Minimum and maximum boiling azeotropes – Different methods of distillation: flash steam – Vacuum – Molecular– Azeotropic – Extractive distillations – Continuous fractionation: multistage tower –Bubble cap – Sieve tray and valve tray towers – McCabe Thiele method.

UNIT IV

LEACHING

9

Solid-liquid extraction – Description of leaching operations and technologies –Applications of leaching – Preparation of solid – Methods of operation and classification of equipment – Solid-liquid equilibrium in leaching – Multi stage cross current and counter current leaching – Calculation of composition and number of stages.

UNIT V

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.

TOTAL : 45 PERIODS

OUTCOMES: The student will be able to

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”, 3rdEdition, McGraw Hill Book Company, 1983.
3. Geankoplis, C.J., “Transport Processes and Unit Operations”, 3rd Edition, Prentice Hall of India Pvt. Ltd, 2000.