Course Details

Subject {L-T-P / C} : CH2112 : Mass Transfer Operations – I {3-1-0 / 4}
Subject Nature : Theory
Coordinator : Prof. Pradip Chowdhury


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, 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, Interphase Mass Transfer: Phase equilibrium, Raoult’s and Henry’s law, Local and overall mass transfer coefficients, Two phase resistance theory, Gas absorption and stripping: Graphical Equilibrium-Stage method and algebraic method for determining number of stages, stage efficiency, design of packed tower, height equivalent to a theoretical plate (HETP), Distillation: Vapor-Liquid Equilibrium (VLE), Flash, steam and batch distillation, McCabe-Thiele and Ponchon-Savarit graphical method for calculating equilibrium stages in trayed towers for binary system, Distillation in a packed tower, Tray efficiency, Multicomponent Distillation, Azeotropic and extractive distillation.

Course Objectives

  1. The basic aspect of learning this subject is to understand the principles of molecular diffusion (both binary and Multicomponent), convective mass transfer and design methodologies of industrially important unit operations like distillation, absorption and stripping.

Course Outcomes

The course would assist students to understand the molecular diffusion phenomena and binary separation principles of various industrially important unit operations from theoretical point-of-view. The students would also learn equilibrium stage calculations of various contacting equipments as highlighted in the course syllabus.

Essential Reading

  1. R. E. Treybal, Mass Transfer Operations, McGraw Hill Education , 2012
  2. B. K. Dutta, Principles of Mass Transfer and Separation Processes, Prentice Hall India Learning Private Limited , 2006

Supplementary Reading

  1. W. L. McCabe, J.C. Smith and P. Harriott, Unit Operations of Chemical Engineering, McGraw Hill Education , 2014
  2. C.J. Geankoplis, Transport Processes and Separation Process Principles (Includes unit operations), Prentice Hall India Learning Private Limited , 2004