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1 - 12/09/2012
Departm
ent of Chem
ical Engineering
Lecture 8Kjemisk reaksjonsteknikk
Chemical Reaction Engineering
Review of previous lectures Langmuir-Hinshelwood/Hougen-Watson models (LHHW) Apparent reactor order and activation energy
2 - 12/09/2012
Departm
ent of Chem
ical Engineering
Elements of Chemical Reaction Engineering (3rd Edition)
1. Week 34, Aug. 21, chapter 1, Introduction, mole balance, and ideal reactors
2. Week 34, Aug. 23, chapter2, Conversion and reactor size3. Week 35, Aug. 28, chapter 3, Reaction rates4. Week 35, Aug. 30, chapter 3, Stoichometric numbers5. Week 36, Sept. 4, chapter 4.1-2, isothermal reactor design (1)6. Week 36, Sept. 6, chapter 4.3 isothermal reactor design (2)7. Week 37, Sept. 11, chapter 10.1-2 catalysis and kinetics (1)8. Week 37, Sept. 13, chapter 10. 3 catalysis and kinetics (2)9. Week 38, Sept. 18, chapter 7.1-4 catalysis and kinetics (2)10.Week 38, Sept. 20, chapter 5, kinetic modeling (1)11.Week 39, Sept. 25, chapter 5,10.5, kinetic modeling (2)12.Week 39, Sept. 28 chapter 6, multiple reactions (1)13.Week 40, Oct. 2, chapter 6 multiple reactions (2)14.Week 40, Oct. 4, summary of chapter 1-7, and 10, 4.4
3 - 12/09/2012
Departm
ent of Chem
ical Engineering
Elements of Chemical Reaction Engineering (3rd Edition)
1. Week 34, Aug. 21, chapter 1, Introduction, mole balance, and ideal reactors
2. Week 34, Aug. 23, chapter2, Conversion and reactor size3. Week 35, Aug. 28, chapter 3, Reaction rates4. Week 35, Aug. 30, chapter 3, Stoichometric numbers5. Week 36, Sept. 4, chapter 4.1-4, isothermal reactor design (1)6. Week 36, Sept. 6, chapter 4.5 isothermal reactor design (2)7. Week 37, Sept. 11, chapter 10.1-2 catalysis and kinetics (1)8. Week 37, Sept. 13, chapter 10. 3 catalysis and kinetics (2)9. Week 38, Sept. 18, chapter 7.1-3 catalysis and kinetics (2)10.Week 38, Sept. 20, chapter 5, kinetic modeling (1)11.Week 39, Sept. 25, chapter 5,10.4, kinetic modeling (2)12.Week 39, Sept. 28 chapter 6, multiple reactions (1)13.Week 40, Oct. 2, chapter 6 multiple reactions (2)14.Week 40, Oct. 4, summary of chapter 1-7, and 10, 4.5
4 - 12/09/2012
Departm
ent of Chem
ical Engineering
Reactor design equation
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Departm
ent of Chem
ical Engineering
Role of catalyst?
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Departm
ent of Chem
ical Engineering
Rate expression
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Departm
ent of Chem
ical Engineering
Simple example: reversible reactionA B
k1/k-1
k2/k-2
k3/k-3
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Departm
ent of Chem
ical Engineering
Other rate determining steps
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Departm
ent of Chem
ical Engineering
Thermodynamics
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Departm
ent of Chem
ical Engineering
Langmuir adsorption
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Departm
ent of Chem
ical Engineering
Multicomponent adsorption / inhibition
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Departm
ent of Chem
ical Engineering
Langmuir adsorption model
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Departm
ent of Chem
ical Engineering
Initial rate expressions
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Departm
ent of Chem
ical Engineering
More than one reactant
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Departm
ent of Chem
ical Engineering
Langmuir-Hinshelwood/Hougen-Watson models (LHHW)
Olaf Andreas Hougen
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Departm
ent of Chem
ical Engineering
What about observed: reaction orderactivation energy ?
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Departm
ent of Chem
ical Engineering
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Departm
ent of Chem
ical Engineering
Rate of reaction, Activation Energy, Order of Reaction
Depends strongly on the site coverage
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Departm
ent of Chem
ical Engineering
20 - 12/09/2012
Departm
ent of Chem
ical Engineering
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Departm
ent of Chem
ical Engineering
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Departm
ent of Chem
ical Engineering
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Departm
ent of Chem
ical Engineering
Reaction order - Activation energy
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Departm
ent of Chem
ical Engineering
Limiting cases - forward rates
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Departm
ent of Chem
ical Engineering
Limiting cases - forward rates
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Departm
ent of Chem
ical Engineering
Limiting cases - forward rates
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Departm
ent of Chem
ical Engineering
Apparent activation energies N2O decomposition CO/ N2O = 2
Kapteijn et al. 11th ICC,1996
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Departm
ent of Chem
ical Engineering
Reaction kinetics, summary
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