Mass Transfer Operations II

By Prof. Chandan Das   |   IIT Guwahati
Learners enrolled: 428
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 fields

:         Mass Transfer Operations I.

: All chemical and design industries like TATA STEEL, Worley Parsons Oman Engineering LLC, Hindalco Industries Limited,Indian Oil Corporation Ltd., Engineers India Ltd, etc..
Course Status : Completed
Course Type : Core
Duration : 12 weeks
Category :
  • Chemical Engineering
  • Minor 1 in Chemical
Credit Points : 3
Level : Undergraduate
Start Date : 25 Jul 2022
End Date : 14 Oct 2022
Enrollment Ends : 08 Aug 2022
Exam Date : 29 Oct 2022 IST

Note: This exam date is subjected to change based on seat availability. You can check final exam date on your hall ticket.

Page Visits

Course layout

Week 1: Humidification and air conditioning:
                1. Basic concepts, Adiabatic saturation temperature
                2. Humidification and dehumidification operations and design calculations of cooling tower
                3. Mechanical Draft Towers: forced draft towers and induced draft towers 
Week 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 dehumidification
Week 3: Drying Operations:
                1. Mechanism of drying and drying equilibria; Drying rate curve
                2. Drying: rate of drying for batch dryers
Week 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 drying
Week 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 extraction
Week 6: Liquid Extraction:
                1. Design calculation of single stage extraction
                2. Design calculation of multistage extraction
                3. Selection of extractors
Week 7: Leaching:
                1. Leaching: single stage operation
                2. Leaching: multistage operation
                3. Supercritical fluid extraction, Equipment for leaching
Week 8: Membrane Separation Technology:
                1. Fundamentals of membrane separation processes
                2. Limitation of membrane separation processes
Week 9: Membrane Separation Technology:
                1. Various models and application: design aspect
                2. Electric field enhanced membrane separation processes
                3. Micellar-enhanced ultrafiltration
Week 10: Adsorption and Ion-exchange:
                1. Adsorption: types and nature of adsorption, Adsorption isotherm
                2. Stage wise and continuous adsorption 
Week 11: Adsorption and Ion-exchange:
                1. Fluidized bed and teeter bed, steady state moving bed adsorber
                2. Unsteady state fixed bed adsorbers, Ion-exchange
Week 12: Crystallization:
                1. Crystallization, types of crystal geometries
                2. Solid-liquid phase equilibrium, Theory of crystallization
                3. Design of crystallizer, Crystallization equipment

Books and references

  1. R. E. Treybal “Mass Transfer Operations”, McGraw –Hill International Edition, 3rd Ed., 1981. 
  2. W. L. McCabe, J. Smith and P. Harriot, "Unit Operations of Chemical Engineering", 6th Ed., McGraw – Hill International Edition, 2001. 
  3. B.K. Dutta, Principles of Mass transfer and separation processes, 1st Ed., PHI, 2012.

Instructor bio

Prof. Chandan Das

IIT Guwahati
Dr. Chandan Das is a Professor in the Department of Chemical Engineering at Indian Institute of Technology Guwahati (IITG). He has received his PhD in Chemical Engineering from Indian Institute of Technology, Kharagpur (IITKGP) after completing his B. Tech and M. Tech in Chemical Engineering from University of Calcutta. He has guided, so far, 10 scholars for their doctoral degree, 28 M.Tech. and is guiding 8 more doctorate scholars. Dr. Das is the recipient of "Dr. A.V. Rama Rao Foundation's Best Ph.D. Thesis and Research Award in Chemical Engineering/Technology" for the year 2010 from Indian Institute of Chemical Engineers (IIChE). Dr. Das has authored about one hundred fifty technical publications in peer reviewed journals and proceedings. He has authored four books entitled "Treatment of Tannery Effluent by Membrane Separation Technology" in Nova Science Publishers, USA, and "Advanced Ceramic Membranes and Applications", “Polymeric Membrane Synthesis, Modification and Applications: Electro-spun and Phase-inverted Membranes” and “Polymeric Membrane Synthesis, Modification and Applications: Electro-spun and Phase-inverted Membranes” in CRC Press, USA and six book chapters. He has two patents in his credit. He has handled seven sponsored projects and seven consultancy projects so far. He has visited Denmark, Malaysia, Sri Lanka, Japan and, Greece for exchanging ideas, etc. Being associated with various research works in the area of water and wastewater treatment, such as treatment of tannery wastewater using membrane separation technology, as well as removal of pollutants using micellar-enhanced ultrafiltration, Dr. Das has gained expertise in membrane separation technology for removing various pollutants from contaminated water and wastewater. His research activity encompasses both understanding of fundamental principles during filtration as well as the development of technology based on membrane separation. In particular, his research areas are modeling of microfiltration, ultrafiltration, nanofiltration, reverse osmosis, treatment of oily wastewater, tannery effluent using membrane-based processes. He has explored the detailed quantification of flux decline from fundamentals. As an offshoot of the major research, he has fabricated ceramic membranes using low cost precursors as sawdust. Catalyst is coated on the ceramic support for manufacturing catalytic membrane reactor. He is also working on decontamination of chromium laden aqueous effluent using Spirulina platensis. He is actively involved in the productions of high value added products, namely, total phenolics, flavonoids, tocopherol, etc. from black rice as well as of 6-gingerol, vitamin C content, essential oil content from ginger of North East India.

Course certificate

The course is free to enroll and learn from. But if you want a certificate, you have to register and write the proctored exam conducted by us in person at any of the designated exam centres.
The exam is optional for a fee of Rs 1000/- (Rupees one thousand only).
Date and Time of Exams: 29 October 2022 Morning session 9am to 12 noon; Afternoon Session 2pm to 5pm.
Registration url: Announcements will be made when the registration form is open for registrations.
The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published. If there are any changes, it will be mentioned then.
Please check the form for more details on the cities where the exams will be held, the conditions you agree to when you fill the form etc.


Average assignment score = 25% of average of best 8 assignments out of the total 12 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100

Final score = Average assignment score + Exam score

YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.

Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IIT Guwahati .It will be e-verifiable at nptel.ac.in/noc.

Only the e-certificate will be made available. Hard copies will not be dispatched.

Once again, thanks for your interest in our online courses and certification. Happy learning.

- NPTEL team

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