THE UNIVERSITY of EDINBURGH

DEGREE REGULATIONS & PROGRAMMES OF STUDY 2021/2022

Information in the Degree Programme Tables may still be subject to change in response to Covid-19

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DRPS : Course Catalogue : School of Engineering : Chemical

Undergraduate Course: Chemical Reaction Engineering 4 (CHEE10008)

Course Outline
SchoolSchool of Engineering CollegeCollege of Science and Engineering
Credit level (Normal year taken)SCQF Level 10 (Year 4 Undergraduate) AvailabilityAvailable to all students
SCQF Credits10 ECTS Credits5
SummaryThe course will cover 4 topics:

1) Nonideal flow reactors: Define a residence time distribution RTD, E(t) and F(t) curves and the mean residence time. Diagnosis of reactor faults by RTD analysis. Modelling of complex behaviour by networks of ideal units. Effect on RTD of diffusion in packed beds. Predict effluent concentrations for multiple reactions.

2) Catalytic rates, catalytic CSTR and PFR reactors. Steps of catalytic reaction including external and internal mass transfer, adsorption, surface reaction and desorption. Models of heterogeneous catalytic kinetics: Effect of external heat and mass transfer resistances. Intrapellet conduction and diffusion. Thiele modulus and effectiveness factor. Extension to pellets of spherical and other shapes. Experimental evidence of diffusional effects: the Weisz modulus. External heat and mass transfer control: simultaneous heat and mass transport in external films: generalised nonisothermal effectiveness.

3) Further kinetics. Solid-fluid non-catalytic reactions and the shrinking core model and uniform conversion models. Design and operating implications of the basic science covered above.

4) Further reactor design: Design of multiphase catalytic reactors by considering multiphase reactions, catalysts decay, mass transfer and heat transfer. Suitable choices of reactor type and reactor design for exothermic reversible catalytic processes. Optimum temperature profile. Staged adiabatic catalytic reactors with intercoolers. Qualtitative consideration of other reactors. Multiphase reactions, both catalytic and non-catalytic, and the modelling thereof. This will include gas-liquid reactions, fluid-solid non-catalytic reactions and fluid-solid catalytic reactions. Qualitative consideration of 3-phase reactions.

Course description 20 Lectures

Lectures

L1: Introduction.
L2-4: Nonideal flow.
L5-10: Catalytic solid-fluid reactions and reactors.
L11-14: External diffusion effects.
L15-18: Reactions in porous catalysts.
L19-20: 3 phase reactions and consolidation.

Entry Requirements (not applicable to Visiting Students)
Pre-requisites Students MUST have passed: Chemical Engineering Kinetics and Catalysis 3 (CHEE09010)
Co-requisites
Prohibited Combinations Other requirements None
Additional Costs N/A
Information for Visiting Students
Pre-requisitesNone
High Demand Course? Yes
Course Delivery Information
Academic year 2021/22, Available to all students (SV1) Quota:  None
Course Start Semester 1
Timetable Timetable
Learning and Teaching activities (Further Info) Total Hours: 100 ( Lecture Hours 20, Formative Assessment Hours 1, Summative Assessment Hours 2, Programme Level Learning and Teaching Hours 2, Directed Learning and Independent Learning Hours 75 )
Assessment (Further Info) Written Exam 100 %, Coursework 0 %, Practical Exam 0 %
Additional Information (Assessment) Two hour written examination at the end of semester one.
Feedback Not entered
Exam Information
Exam Diet Paper Name Hours & Minutes
Main Exam Diet S1 (December)2:00
Resit Exam Diet (August)2:00
Learning Outcomes
Students should be able to:

1) Describe the mass& heat transfer and reaction phenomena occurring in heterogeneous reactions and model these.
2) Make informed choices of reactor types for heterogeneous reactions
3) Write and simplify appropriately the overall rate and balance equations for multiphase reactions
4) Design reactors for heterogeneous reactions and optimise operating conditions
5) Use RTD methods to diagnose nonideal flows in reactors and calculate conversions in nonideal reactors.
Reading List
Non-ideal flow in reactors: Metcalfe Ch 6, Levenspiel Ch 11 section 11.1
to end of example 11.1, example 11.4; Ch 12 Figs 12.1 12.3, 12.4; Fogler Ch 13 and Ch14;

Catalytic reactions: Levenspiel Ch 17, Levenspiel Ch 18 - pp 378-394 particularly important; Ch 19 - pp430-438 particularly important; examples 19.2 and 19.1 are illustrative but both use nice optimisation methods not taught in class. Fogler Ch 10;

Non-catalytic reactions: Levenspiel Ch 25,
Gas-liquid reactions: Levenspiel ch 23, 24
Three phase reactors: Levenspiel Ch22.1
And Fogler Ch 11 and Ch 12;
Students with learning profiles: copies of lecture overheads (the ┬┐notes┬┐) are available.
Additional Information
Graduate Attributes and Skills Not entered
KeywordsNot entered
Contacts
Course organiserDr Harvey Huang
Tel: (0131 6)50 7793
Email: Yi.Huang@ed.ac.uk
Course secretaryMrs Shona Barnet
Tel: (0131 6)51 7715
Email: Shona.Barnet@ed.ac.uk
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