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School of Chemical and Environmental Engineering

Now offering two distinct diplomas: Chemical Engineering and Environmental Engineering

Unit Operations


SchoolChemical and Environmental Engineering
Course LevelUndergraduate
DirectionChemical Engineering
Course IDCHE 311Semester5th
Course CategoryRequired
Course ModulesInstruction Hours per WeekECTS

Lectures and Tutorials, Lab assignments

T=3, E=1, L=2

Course TypeScientific area
Instruction/Exam LanguageGreek
The course is offered to Erasmus studentsNo
Course URL 



Learning Outcomes

Upon successful completion of this course the students will acquire new knowledge and specific skills on the following subjects and will be able to:

  • Analyze existing and design new Physical Separation Processes for the Chemical Industry (raw material and product processing units) or for waste treatment plants (gaseous emissions or wastewater).
  • Understand in depth the processes of physical separation and to be able to choose the best available technology per case.
  • Optimize the performance of already installed separation processes or to carry out re-engineering actions.
  • Have solutions for a variety of problems for the treatment of environmental pollution, the improvement of the quality / purity of the products produced in the chemical industry.
General Competencies/Skills
  • Review, analysis and synthesis of data and information, with the use of necessary technologies
  • Project design and management
  • Work in interdisciplinary environment


  1. Introduction to separation processes (description and necessity).
  2. DISTILLATION: (i) Liquid-Vapor Equilibrium. Equilibrium diagrams, Enthalpy-concentration diagrams.
  3. (ii) The Distillation Process: Fractional Distillation,
  4. (iii) Analysis and Design of distillation process. McCabe-Thiele Graphical Method,
  5. (iv) Ponchon-Savarit graphical method.
  6. GAS ABSORPTION and GAS STRIPPING: (i) Gas-Liquid equilibrium. Design elements of the absorption process. Analysis and Design of the Absorption Process,
  7. (ii) Absorption columns based on mass transfer rate – Packed Columns with inert materials,
  8. (iii) Analysis and design of the process of desorption, depletion or stripping (gas stripping).
  9. LIQUID-LIQUID EXTRACTION: (i) Liquid-liquid equilibrium and triangular coordinates/diagrams. General elements and design considerations of the Extraction process,
  10. (ii) Graphical methods of process design and analysis: Hunter-Nash, McCabe-Thiele and Varteressian-Fenske methods.
  11. ADSORPTION: (i) Fluid-solid equilibrium. Langmuir, Freundlich, Temkin and Brunauer-Emmett-Teller (BET) isotherms,
  12. (ii) Dynamic behavior and basic principles of the Adsorption process.
  13. (iii) Process Analysis and Design.


Lecture MethodDirect (face to face)

Use of Information and Communication Technology

  • Power point presentations
  • E-class support
Instruction OrganisationActivityWorkload per Semester
- Lectures39
- Tutorials13
- Laboratory26
- Lab reports and Autonomous study72
Course Total150

Assessment Method

I.  Written final examination (70%) : Theory and problems to be resolved
II. Laboratory: (30%)


  • Ioannis Yentekakis, «Unit Operations: Analysis & Design», Klidarithmos Publ., Athens, 2010, ISBN: 978-960-461-346-5.
  • J.D. Seader, E.J. Henley, “Separation Process Principles”, J. Wiley & Sons, Inc. New York, 1998, ISBN: 0-471-58626-9.
  • R.E. Treybal, “Mass-Transfer Operations”, McGraw-Hill, 3rd Ed., New York, 1987, ISBNQ 0-07-065176-0.
  • W.L. McCabe, J.C. Smith, P. Harriott, “Unit Operations for Chemical Engineering”, 6th Ed., McGraw-Hill, New York, 2001, ISBN: 0.07-118173-3. 


Course Instructor:Professor Ioannis V. Yentekakis  (Faculty - ChEnvEng)
Lectures:Professor Ioannis V. Yentekakis  (Faculty - ChEnvEng)
Tutorial exercises:Professor Ioannis V. Yentekakis  (Faculty - ChEnvEng), N. Vakakis (LTS -ChEnvEng), G. Botzolaki (LTS - ChEnvEng)
Laboratory Exercises:N. Vakakis (LTS -ChEnvEng), G. Botzolaki (LTS - ChEnvEng)