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DRPS : Course Catalogue : School of Engineering : Postgrad (School of Engineering)

Postgraduate Course: Batchwise and Semibatch Processing (MSc) (PGEE11157)

Course Outline
SchoolSchool of Engineering CollegeCollege of Science and Engineering
Credit level (Normal year taken)SCQF Level 11 (Postgraduate) AvailabilityNot available to visiting students
SCQF Credits10 ECTS Credits5
SummaryThis course reviews types of batch processes and industries where they are employed. The equipment used in batch processes is described. Scheduling and consequent equipment sizing is explained. Topics presented in detail include: unsteady state reaction and heat transfer, crystallisation, fluid mechanics in agitated vessels, batch distillation,
Hazards associated with batch processes and the hazard and operability analysis for a batch plant are discussed.
Course description 20 Lectures
Lectures (each topic is equivalent to approximately two hours of lectures)
Topic 1. Introduction to batch and semi-batch process, factors favouring batch or semi-batch processes. Typical equipment used in batch processes.
Topic 2. Batch scheduling. Tools and techniques. Gant charts. Sizing of batch processing equipment. Dealing with bottlenecks.
Topic 3. Agitation, mixing and multiphase systems - types of agitator, flow patterns in vessels, power consumption in agitation, mixing time. Dealing with dispersed liquids, solids and gases in liquid systems. Agitation energy, mass transfer considerations.
Topic 4. Aspects of batch reactor design - revision of qualitative reactor considerations. Effect of excess reactants on time to complete reactions. Pre-equilibria - determination of observed rate constants. Competing reactions. Mixing effects in reactors.
Topic 5. Heat transfer - Heat transfer utilities. Steam usage, steam traps. Overall heat transfer coefficients in agitated, jacketed vessels. Coil heat transfer coefficients. Heating times for vessels - latent heating and sensible heat.
Topic 6. Design and scheduling of batch distillation - Simple batch distillation, Rayleigh equation, use of relative volatility, batch distillation with rectification. Operation at constant reflux, operation at variable reflux, running costs, Bogart equation distillation cuts from batch distillation. Steam and assisted distillation, principles, consideration of equilibrium, calculation of steam required
Topic 7. Crystallisation - An introduction to crystallisation, supersolubility, nucleation and growth, crystal yield, equipment and processes.
Topic 8. Filter design for batch processes.
Topic 9. Statistical process control in batch processes - Quality control, use of Shewhart and CuSum charts to monitor process performance.
Topic 10. Safety in batch and semi-batch processes - General safety in batch processes, review of Seveso disaster, batch HAZOP, humen error, thermal runaway.

1. Scheduling of batch processes,
2. Mixing and agitation
3. Reactor design,
4. Heat transfer
5. Distillation
6. Crystallisation
Entry Requirements (not applicable to Visiting Students)
Pre-requisites Co-requisites
Prohibited Combinations Other requirements None
Course Delivery Information
Not being delivered
Learning Outcomes
On completion of this course, the student will be able to:
  1. Discuss the advantages and disadvantages of batchwise and continuous processes.
  2. Apply their knowledge of chemical engineering unit operations to batch processes.
  3. Schedule batch processes effectively and size batch equipment.
  4. Discuss the hazards associated with batch production.
Reading List
1. Chemical Engineering Vol. 6, Sinnott (Pergamon).
2. Unit Operations of Chemical Engineering, McCabe, Smith and Harriot.
3. Atherton J., Carpenter K., Process Development: Physiochemical Concepts, Oxford Chemistry Primers, 2005.
4.Process Heat Transfer - Kern.
5. Batch Processes E. Korovessi and Linninger, 2005.
6. Crystallization, Mullin, J.W. 4th ed 2001.
7. Statistical Process Control, G.B. Wetherill and D.W. Brown, Chapman and Hill, 1991.
Additional Information
Graduate Attributes and Skills Not entered
KeywordsNot entered
Course organiserDr Jennifer Skilling
Tel: (0131 6)50 4863
Course secretaryMrs Shona Barnet
Tel: (0131 6)51 7715
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