Courses » Mechanical Operations

Mechanical Operations

Around 75% of chemical manufacturing processes involve small solid particles at some point. Proper design and handling of these fine particles often makes the difference between success and failure of the product. Many products such as catalysts, pigments, fertilizers, cements, ceramics and pharmaceuticals are currently manufactured in particulate forms. Mechanical Operations deal with Science and Technology of particulate matter, which is a multidisciplinary field including Materials Science, Environmental, Biomedical, Aerospace, Agricultural, Chemistry, Microbiology and Cell Science, Pharmacy and Medicine. The primary objective of this course is to
•    identify the important physical mechanisms occurring in processes involving particles
•    discuss unit operation and its role in Chemical industries, characteristics of particulate solids, Principles of size reduction, particle dynamics and separation of particles
•    formulate and solve mathematical descriptions of such processes

Undergraduate students. However, this course will also be helpful for anyone of any professional level, preferably holding a college degree or with substantial industrial experience, working in the production, handling, processing, modification or characterization of particular solids (powders and bulk solids).

Any chemical industry which deals with particulate matter.

699 students have enrolled already!!


Shabina Khanam is working as Associate Professor in Chemical Engineering Department of IIT Roorkee. She has completed B.Tech degree from AMU Aligarh, Aligarh in 2000 and M.Tech and Ph.D. degree from IIT Roorkee in 2002 and 2007, respectively. Her major fields of study are Process Integration, Energy Management and Modeling and Simulation. She has almost 9 years of experience in teaching and research. During this period she has supervised 1 Ph.D. and 14 M.Tech theses. At present 6 Ph.D and 3 M.Tech theses are in pipe line. She has published 29 and 24 research papers in different refereed journals and conferences, respectively. She has taught the course Mechanical Operations six times in her 9 years of teaching career.


  Week 1
  • Introduction
  • Characterization of a single particle
  • Characterization of collection of particles
Week 2
  • Fine grain size distribution
  • Effectiveness of screen
  • Industrial screening equipment
  • Size reduction
Week 3
  • Laws of comminution
  • Examples of laws of comminution
  • Size reduction equipment
Week 4    
  • Particle dynamics
  • Particle dynamics – Examples
  • Classification and Jigging


  1.  Backhurst, J. R. and Harker J. H.,”Coulson and Richardson Chemical Engineering”, Vol. II”,5th Ed., 2002, Butterworth-Heinemann.
  2.  Brown G.G. and Associates, "Unit Operations", 1995, CBS Publishers.
  3.  McCabe W.L., Smith J.C and Harriott P., “Unit Operations of Chemical Engineering”, 7th Ed., 2005, McGraw Hill.
  4.  Geankoplis C.J., Transport Processes and Separation Process Principles, 4th Ed., 2003, Prentice Hall.
  5.  Narayanan C.M. and Bhattacharya B.C., “Mechanical Operation for Chemical Engineers –Incorporating Computer Aided Analysis”, 1992, Khanna Publishers.
  • The exam is optional for a fee.
  • Date of Exam: March 31st 2019 (Sunday).
  • Time of Exam: Morning session 9am to 2 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.

  • Final score will be calculated as : 25% assignment score + 75% final exam score
  • 25% assignment score is calculated as 25% of average of  Best 3 out of 4 assignments
  • E-Certificate will be given to those who register and write the exam and score greater than or equal to 40% final score. 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 Roorkee. It will be e-verifiable at nptel.ac.in/noc.