Syllabus

Module-I: Molecular Diffusion
Fick’s law of diffusion, Steady state diffusion, Multicomponent diffusion, Measurement and prediction of diffusion coefficients, Diffusion in variable area, Molecular diffusion in liquids solids and gel, Knudsen diffusion. [No. of lecture hours: 07]
Module-II: Convective Mass Transfer and Mass Transfer Coefficients
Types of mass transfer coefficient, dimensionless groups in mass transfer and various correlations, Turbulent or eddy diffusion, The wetted wall column experiment, Theories of mass transfer: Film theory, Penetration theory, Surface renewal theory, Analogies in mass, heat and momentum transfer: Reynolds analogy, Chilton-Colburn analogy. No. of lecture hours: 06]
Module-III: Interphase Mass Transfer
Phase equilibrium, Raoult’s and Henry’s law, Local and overall mass transfer coefficients, Two film resistance theory. [No. of lecture hours: 04]
Module-IV: Gas Absorption and Stripping
Graphical Equilibrium-Stage method and algebraic method for determining number of stages in a trayed tower, stage efficiency, designing of packed tower, height equivalent to a theoretical plate (HETP). [No. of lecture hours: 10]
Module-V: Distillation
Vapor-Liquid Equilibrium (VLE), Flash, steam, and batch or differential distillation processes, McCabe-Thiele and Ponchon-Savarit graphical methods for calculating equilibrium stages in trayed towers for binary systems, Distillation in a packed tower, Tray efficiency, Multicomponent Distillation, Azeotropic and extractive distillation. [No. of lecture hours: 10]

To understand the fundamental principles of molecular diffusion (both binary and multicomponent).

To acquaint students with the principles of mass transfer coefficients, different theories on mass transfer, and their importance in designing.

To conceptualize and learn design methodologies of trayed and packed absorption, stripping, and distillation columns and their industrial relevance.

(i) The course would assist students to understand the molecular diffusion phenomena and binary separation principles of various industrially important unit operations.
(ii) The students will gain a basic know-how on various theories of mass transfer operations and their importance in design calculations.
(iii) The students would learn methods of equilibrium stage calculations using both graphical and analytical techniques for trayed columns.
(iv) The students should be able to calculate packed column heights and compare the performances between trayed and packed towers from engineering point-of view.
(v) The students should be able to justify a column selection, find optimum operating conditions and theoretically troubleshoot column anomalies.

R. E. Treybal, Mass Transfer Operations, Mass Transfer Operations, McGraw Hill Education

B. K. Dutta, Principles of Mass Transfer and Separation Processes, Prentice Hall India Learning Private Limited

C.J. Geankoplis, Transport Processes and Separation Process Principles (Includes unit operations, Prentice Hall India Learning Private Limited

E.L. Cussler, Diffusion: Mass Transfer in Fluid Systems, Cambridge University Press India Pvt. Ltd,