Advanced Systems of Chemical Reaction Engineering
Objectives
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The objectives of the course are: • Instill a sense of the complexity of the catalytic process, namely that beyond the chemical reaction also mass transfer, internal or external, is crucial for the design of the reactor or to the prediction of its behaviour. • Describe the main types of catalytic reactors and the mathematical models that allow to simulate its operation. With the acquired knowledge the students should be able to: • Propose mechanisms for a catalyzed reaction, deduce the corresponding kinetic models, choose the model that best fits the experimental data. • Determine if a given catalytic process is limited by chemical reaction or mass transfer, intraparticle or external. • Simulate the operation of a catalytic reactor, with the use of appropriate mathematical models. |
General characterization
Code
12562
Credits
6.0
Responsible teacher
Teresa Maria Alves Casimiro Ribeiro
Hours
Weekly - 4
Total - 47
Teaching language
Português
Prerequisites
There are no requirements.
Bibliography
1. H. Scott Fogler, Elements of Chemical Reaction Engineering, 4rd edition, Prentice-Hall, 2006.
2. J.L. Figueiredo e F. Ramôa Ribeiro, Catálise Heterogénea, Fund. Calouste Gulbenkian, 1989.
3. Francisco Lemos, José Madeira Lopes, Fernando Ramôa Ribeiro, "Reactores Químicos", IST Press, Lisboa 2002
4. G. Froment, K. Bischoff, Chemical Reactor Analysis and Design, 2nd edition, John Wiley & Sons, 1990
Teaching method
The course is organized in theoretical, practical and theoretical-practical classes. The theoretical classes consist in powerpoint presentations of the different subjects with examples in order to allow a better understanding. It is accomplished one single laboratory practical session, where it is performed the fluidization of a catalytic bed, the measurement of the linear velocity of the gas in order to calculate the catalyst particle size. The theoretical practical classes are divided in two different types of classes: problem resolution classes and classes dedicated to the practical works in computer room. The practical works are carried out in working groups, being the evaluation made in workshops with powerpoint Presentations. The practical part has the weight of 60% in the final grade. The individual work of the students is evaluated in two tests, which enter with the weight of 40% to the final grade.
Evaluation method
The practical works are carried out in working groups, being the evaluation made in workshops with powerpoint
Presentations. The practical part has the weight of 60% in the final grade. The individual work of the students is evaluated in two tests, which enter with the weight of 40% to the final grade.
Subject matter
Intraparticle gradient effects. Diffusion and reaction in the catalyst pellet. Non-isothermal catalyst pellet.
Heterogeneous catalytic reactors:
The packed-bed reactor. The packed-bed with axial diffusion.
The fluidized-bed reactor. The Kunii-Levenspiel model.
The multiphase reactors: slurry and trickle-bed.
Membrane reactors: inert and catalytic membranes.