Chemical Reactors II (Option)

Chemical and Biochemical Engineering, Publication in the Diário da República - Despacho nº 10764/2011 - 30/08/2011

5.5 ECTS; 3º Ano, 1º Semestre, 30,0 T + 30,0 P

- Dina Maria Ribeiro Mateus
- José Manuel Quelhas Antunes

Not applicable.

Develop skills of analysis of real reactors through the residential distribution theory and understand the impact of catalysis in transformation processes through the study of catalytic reactors.

1. Introduction. Brief review on the design of ideal homogeneous chemical reactors (perfectly agitated continuous reactor, discontinuous reactor and tubular reactor) and chemical kinetics.
2. Complements of ideal chemical reactors.
2.1. Non-isothermal operation and multiplicity of stationary states.
2.2. Reactions in gaseous phase
2.3 Semi-descontínuous
3. Residence times distribution – RTD.
3.1. Main characteristics of the RTD function and its experimental determination.
3.2. Modelling of reactors with non-ideal flow using RTD-Total segregation model, maximum mixing model, diffusional piston model and serial reactors mode
3.3. Use of spreadsheet to calculate RTD
4. Catalytic reactors.
4.1. Catalysis.
4.2 Catalysis by enzymes. Enzymatic kinetics, Michaelis-Menten model. Enzymatic kinetics in multiphasic systems.
4.2. fixed-bed catalytic reactors. Homogenous models 1 and 2 dimensions.

The following experimental studies will be carried out in laboratory practice classes:
TL1-Determination of kinetic constants in the invertase activity in free and immobilized Sacharomyces cells.
TL2-Determination of the distribution of residence times in continuous reactors.

Evaluation Methodology
In continuous evaluation, the final classification is obtained by weighting the classification obtained in two mini-tests (the first with a weight of 15% and the second with a weight of 25%), the classification obtained in the laboratory studies and the respective reports (40%) and the classification obtained in a computational task related to RTD (20%).
In final evaluation, the two mini-tests are replaced by a written test (weight of 40%), maintaining the laboratory (40%) and computational (20%) components.

- Fogler, H. (1986). Elements of Chemical Reaction Engineering. New Jersey: Prentice-Hall
- Levenspiel, O. (1999). Chemical Reaction Engineering. New York: John Wiley
- Froment, G. e Bischoff, K. (2010). Chemical Reactor Analysis and Design. New York: John Wiley & Sons
- Lemos, F. e Lopes, J. e Ribeiro, F. (2002). Reactores Químicos. Lisboa: IST Press

Method of interaction
Lectures, tutorials, laboratory classes, case studies.

Software used in class
MS Excel