Syllabus - Mass Transfer-I (CM-501)

Chemical Engineering

Mass Transfer-I (CM-501)

V-Semester

Unit I

Diffusion phenomenon

Molecular and eddy diffusion in gases, liquids and solids, interface mass transfer, Mass transfer theories: film theory Penetration theory and surface renewal theory

Unit II

Fundamentals of Mass Transfer

Individual and film coefficients, overall mass transfer coefficient and their inter relationships; Analogies in transfer processes, determination of mass transfer co-efficient; two phase flow in packed beds, co-current and counter current processes flooding loading, column internals: types of trays/ plates and packing, point and plate efficiency.

Unit III

Distillation

Vapour liquid Equilibrium, Boiling point diagram, Relative volatility, flash and differential distillation for two component mixture, steam distillation, azeotropic distillation, extractive distillation.

Unit IV

Continuous and Differential contact Distillation

Rectification, reflux ratio, calculation of numbers of plates by NTU, optimum reflux ratio, open steam, multiple feed and multiple product calculations, Enthalpy concentration diagram, Panchon-Savarit method for calculation of number of theoretical plates. Approximate equation; Fensky and Underwood equation for minimum numbers of plate calculation. Batch distillation.

Unit V

Absorption

Absorption and Stripping of dilute mixtures: Fundamentals of absorption, equilibrium curves, Operating lines from material balances, co-current, Counter current and cross current contacting fluids, Design of absorption towers, Calculations of NTU and HTU, concept of HETP.

Course Objective

The purpose of this subject is to introduce the undergraduate students with the most important separation equipments in the process industry, and provide proper understanding of unit operations. This course explains the diffusion phenomena, fundamentals of mass transfer and techniques involved in mass transfer operations of distillation and absorption.

Practicals

To determine to diffusion coefficient of liquid vapour in air by Stefan’s tube.
To determine diffusion coefficient, or diffusivity, of given liquid in air.
To determine Mass Transfer Co-Efficient in gas liquid system by evaporation
To study the rates and phenomena of diffusion into gases flowing through the pipe.
To study different types of plates and packing.
To prepare the vapor-liquid equilibrium and Boiling point diagram for a binary liquid mixture.
Determination of relative volatility of a given system of acetic acid and water.
To verify Rayleigh equation for differential distillation of binary system.
To carry out the steam distillation.
Studies on packed tower distillation unit.
Studies on the sieve plate distillation unit.
Studies on bubble cap distillation column.
To study the absorption of a gas in a packed column and calculation of NTU and HTU.

Reference Books

Mc-Cabe W.L, Smith J.M.; Unit Operation in Chemical Engineering; Tat Mc-GrawHill.
Coulson J. M. Richardson; Chemical Engineering – Vol 2; Butterworth Heinmann, Oxford, Delhi
Treybal R.E; Mass Transfer Operation; Mc. Graw Hill.
Sherwood, T.K. Pigford R.L. and Wilke, C.R.; Mass Transfer; Mc. Graw Hill.