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Indian Institute of Technology Guwahati

Mass Transfer Operations II

Indian Institute of Technology Guwahati and NPTEL via Swayam


This course will provide an overview on mass transfer at basic to an intermediate level. This course applies the concepts of diffusion and interphase mass transfer to the analysis of different unit operations such as humidification, drying, adsorption,extraction, leaching, crystallization and membrane processes. The course synthesizes fundamental concepts and analytical skills to understand mass transfer operations and to tackle the sort of complex problems. Information on key topics will be provided in the form of summary of lecture notes, problems and adequate references.INTENDED AUDIENCE: Under graduate students/Candidates from professional fieldsPREREQUISITES: Mass Transfer Operations I.INDUSTRY SUPPORT: All chemical and design industries like TATA STEEL, Worley Parsons Oman Engineering LLC, Hindalco Industries Limited,Indian Oil Corporation Ltd., Engineers India Ltd, etc..


Week 1: Humidification and air conditioning:
1. Basic concepts, Adiabatic saturation temperature
2. Humidification and dehumidification operations and designcalculations of cooling tower
3. Mechanical Draft Towers: forced draft towers and induced draft towersWeek 2: Humidification and air conditioning:
1. Key points in the design of cooling tower and Step-by-step design procedure of cooling tower
2. Air conditioning,Example problems on dehumidificationWeek 3: Drying Operations:
1. Mechanism of drying and drying equilibria; Drying rate curve
2. Drying: rate of drying for batch dryersWeek 4: Drying Operations:
1. Drying: rate of drying for continuous dryers
2. Drying time calculation from drying rate curve
3. Through circulation and cross circulation dryingWeek 5: Liquid Extraction:
1. Introduction to liquid-liquid extraction, Liquid-liquid equilibria
2. Effect of temperature on liquid-liquid equilibria
3. Design calculation of single stage extractionWeek 6: Liquid Extraction:
1. Design calculation of single stage extraction
2. Design calculation of multistage extraction
3. Selection of extractorsWeek 7: Leaching:
1. Leaching: single stage operation
2. Leaching: multistage operation
3. Supercritical fluid extraction, Equipment for leachingWeek 8: Membrane Separation Technology:
1. Fundamentals of membrane separation processes
2. Limitation of membrane separation processesWeek 9: Membrane Separation Technology:
1. Various models and application: design aspect
2. Electric field enhanced membrane separation processes
3. Micellar-enhanced ultrafiltrationWeek 10: Adsorption and Ion-exchange:
1. Adsorption: types and nature of adsorption, Adsorption isotherm
2. Stage wise and continuous adsorptionWeek 11: Adsorption and Ion-exchange:
1. Fluidized bed and teeter bed, steady state moving bed adsorber
2. Unsteady state fixed bed adsorbers, Ion-exchangeWeek 12: Crystallization:
1. Crystallization, types of crystal geometries
2. Solid-liquid phase equilibrium, Theory of crystallization
3. Design of crystallizer, Crystallization equipment

Taught by

Dr. Chandan Das

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