Postgraduate Course: Separation Processes (MSc) (PGEE11156)
|School||School of Engineering
||College||College of Science and Engineering
|Credit level (Normal year taken)||SCQF Level 11 (Postgraduate)
||Availability||Not available to visiting students
|Summary||One half of this course covers adsorption, absorption and crystallization processes. The section on adsorption process starts with concise lectures for introducing adsorption fundamentals, adsorption column dynamics and industrial cyclic adsorption processes. It then deals with how to design cyclic adsorption processes in depth. The second part on absorption processes, applies absorption to acid gas removal. The third part on crystallisation processes includes crystal phase equilibrium, mass and energy balances and the analysis of a crystalliser.
The other half of the course, on distillation, comprises a discussion of composition and temperature profiles in ideal distillation columns, followed by examples and purposes of non-standard configurations and energy integration schemes for distillation. The modelling basis for tray-by-tray simulation of distillation columns is followed by a review of how azeotrope - forming mixtures can be separated. Topics include the causes of non-ideality, extractive and azeotropic distillation and composition trajectories.
1) Lecture 1: Introduction to adsorption processes.
PSA, TSA and displacement for regeneration, equilibrium and kinetic separation, Skarstrom cycle, pressure equalisation
2) Lecture 2: How to design a PSA cycle
3) Tutorial 1: Practicing actual design of a PSA step configuration ┐ CO2 PVSA
4) Lecture 3: Industrial adsorption processes
Air separation by adsorption, hydrogen PSA ┐ polybed system, displacement desorption
5) Tutorial 2: Practicing actual design of a PSA step configuration ┐ H2 PSA.
6) Lecture 4: Physical/Chemical solvents absorption process
7) Tutorial 3: How to design a Selexol process.
8) Lecture 5: Phase equilibria in crystallization.
Solubility curve, isobaric phase diagram ┐ T-x diagram (Eutectic behaviour and solid solubility behaviour). Understanding the actual T-x diagram, Enthalpy-concentration diagram, mass and enthalpy balances using T-x and H-x diagrams, Lever rule
9) Lecture 6: Crystallizer
Crystallizer classification, vacuum crystallizer, DTB crystallizer, Crystallizer design using MSMPR, population-density function, cumulative and differential CSDs using moment equations, operation for increasing crystal size.
10) Tutorial 4: How to design a vacuum crystallizer
11) Composition profiles in ideal distillation.
12) Non-standard columns.
13) Energy integration in ideal columns.
14) Causes of non-ideality.
Non-ideal K-values: relation to activity coefficients.
Azeotropes. P┐x and T┐x┐y diagrams for non-ideal and azeotropic systems.
Difficulty of separating azeotropes.
Infinite dilution K-values to predict azeotropes.
15) Extractive distillation.
16) Azeotropic distillation : ethanol ┐ water ┐ benzene example.
17) Choice of mass separating agent.
18) Use of pressure to break azeotropes.
19) Non-ideal composition profiles.
20) Distillation trajectories and distillation boundaries.
Entry Requirements (not applicable to Visiting Students)
||Other requirements|| None
Course Delivery Information
|Academic year 2018/19, Not available to visiting students (SS1)
|Learning and Teaching activities (Further Info)
Lecture Hours 20,
Formative Assessment Hours 1,
Summative Assessment Hours 2,
Programme Level Learning and Teaching Hours 2,
Directed Learning and Independent Learning Hours
|Assessment (Further Info)
|Additional Information (Assessment)
||Written Exam 100%
||Hours & Minutes
|Main Exam Diet S2 (April/May)||2:00|
On completion of this course, the student will be able to:
- On successful completion of the course, students should be able to: - Design stepwise configuration of a multi-column cyclic adsorption process by a short-cut method. - Describe how various adsorption processes work in the context of actual industrial processes containing the adsorption.
- Describe how to configure acid gas removal processes having absorption columns. - Construct the mass and energy balances around a crystalliser and design a crystallizer given the target specification.
- Recognise design faults from column temperature/composition profiles in distillation columns for ideal binary mixtures, Describe tray by tray distillation methods. - Discuss heat integration for distillation, citing and explaining a number of strategies.
- Describe and discuss the causes and consequences of non-ideality in distillation, with particular reference to Hydrogen Bonding. - Explain features of non-ideal distillation profiles and how they differ from ideal.
- Draw flowsheets for and describe details of azeotropic and extractive distillation systems for separating non-ideal systems, including those with azeotropes. - Sketch distillation boundaries for ternary systems, and calculate the consequent limits on separations for azeotropic systems.
|Adsorption part |
Principles of Adsorption and Adsorption Processes, 1984.Ruthven D.M. ┐ Wiley.
Pressure Swing Adsorption, 1994 Ruthven D.M., Farooq S., Knaebel K.S. ┐ Wiley.
Perry┐s Chemical Engineers┐ Handbook. 7th Ed., 1997. Perry R.H. and Green D.W., McGraw-Hill.
Unit Operations of Chemical Engineering, 1993.
MaCabe W.L., Smith J.C., Harriott P.┐ McGraw Hill.
Crystallization, 2001 (available in library as electronic resource)
Mullin J.W. ┐ Oxford.
Industrial Crystallization, 1995, Narayan S. Tavare
King CJ (McGraw┐Hill, 1984)
Distillation Design in Practice
Rose LM (Elsevier,1985)
Conceptual Design of Chemical Processes
Douglas J (McGraw┐Hill, 1988)
(Recommended to buy for both this course and CHEE10005 Chemical Engineering Design: Synthesis and Economics 4.
Chapter 7 and Appendices A.2 ┐ A.6 have some excellent material on distillation synthesis and short cut methods.
There is also a good discussion of distillation boundaries for non-ideal separations.)
Conceptual design of Distillation Systems
Doherty MF, Malone MF (McGraw┐Hill, 2001)
Systematic Methods of Chemical Process Design
Biegler LT (Pentice Hall, 1997)
|Graduate Attributes and Skills
|Keywords||Adsorption,Absorption,Crystallization,Distillation,Engineering,Process design,Process analysis
|Course organiser||Dr Hyungwoong Ahn
Tel: (0131 6)50 5891
|Course secretary||Mrs Shona Barnet
Tel: (0131 6)51 7715