Syllabus - Mass Transfer-II (CM-601)

Chemical Engineering

Mass Transfer-II (CM-601)

VI-Semester

Unit I

Adsorption

Adsorption theories, types of adsorbent; activated carbon, silica and molecular sieves. Batch and column, adsorption; Break through curves, Liquid percolation and gas adsorption, calculation.

Unit II

Humidification and Dehumidification

Humidification : General Theory, psychometric chart, fundamental concepts in humidification & dehumidification, wet bulb temperature, adiabatic saturation temperature, measurement of humidification calculation of humidification operation, cooling towers and related equipments.

Unit III

Drying

Equilibrium mechanism theory of drying, drying rate curve. Batch and continuous drying for tray driers, Drum dryers, spray and tunnel dryers.

Unit IV

Leaching and Crystallization

Leaching: solid liquid equilibrium, Equipment, principles of leaching, concurrent and counter current systems and calculation of number of stage required. Crystallization: Factors governing nucleation and crystal growth rates, controlled – growth of crystals, super saturation curve, principle and design of batch and continuous type equipment.

Unit V

Liquid –Liquid extraction

Liquid equilibrium & Ponchon – Savarit method, Mc-Cabe-Thiele method, packed & spray column, conjugate curve and tie line data, plait point, ternary liquid – liquid extraction, operation and design of extraction towers analytical & graphical solution of single and multistage operation in extraction, Co-current, counter current and parallel current system.

Course Objective

The objective 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. At the end of study the student will come to know basic operations of cooling towers, dryer, as well as design of a adsorber and calculations involved in liquid-liquid extraction and solid liquid extraction.

Practicals

  • To study the rate dissolution of a rotating cylinder and then to calculate the mass transfer coefficient.

  • Study of Adsorption in a packed bed for a Solid liquid system, plotting the breakthrough curve of adsorption for a given system

  • To study the performance of forced draft water-cooling tower.

  • To study the drying characteristics of a wet granular material using natural and forced circulation in tray dryer.

  • Studies on solid-liquid extraction column.

  • To study the yield of crystals of a saturated solution using open tank type agitated batch crystallizer.

  • To study the yield of crystals of a saturated solution using Swenson walker crystallizer.

  • To draw the tie lines and plot equilibrium curve for given ternary system.

  • Liquid- Liquid extraction in a packed column for co-current and counter current flow of binary systems.

  • To Study on Liquid-Liquid extraction on a spray Extraction Column.

Reference Books

  • Mc-Cabe, W.L. Smith J.M. – Unit Operation in Chemical Engg.,5th edition Tata McGraw Hill Hogakusha, Tokyo, New Delhi.

  • Coulson J.M. Richardson J.F.-Chemical Engg., Vol 2, Edition-2, Butserworth Heinmann, Oxford, New Delhi.

  • Treybal R.E. – Mass Transfer Operation – 3rd edition, Mc. Graw Hill Book Co. New York.