Separation Processes

The disciplines of the curriculum of Bioengineering of previous semesters that are more relevant to the understanding of the contents of Separation Processes are: Mathematics, Thermodynamics and Heat and Mass Transfer.

The course is developed in theoretical classes where the contents of the curricular unit are exposed, using wherever possible the presentation of examples, and theoretical practices classes for solving problems of application. In theoretical practices classes, after a general discussion about the problems, students are encouraged to continue with its resolutions and, at the end, a discussion of the results is made. The problems proposed to solve in the theoretical practices classes are available to the students in advance. 

Provide the students with the ability to: i) study and understand four unit operations frequently used at the industrial level: filtration, sedimentation, distillation and drying; ii) apply concepts of heat and mass transfer in the studied unit operations; iii) understand the equipment used in these operations and learn the concepts and equations that allow to characterize the operation and to design the equipment. It is intended also that students develop the ability to solve problems involving the separation processes studied.

1. Filtration. Filtration at constant pressure and constant flow. Conventional crossflow filtration. Darcy’s Law and Carman-Kozeny equation. Specific resistance of cake and filter media. Compressibility of the filtration cake. Selection of laboratory and industrial equipment. Washing and filtration cycles.

2. Distillation. Continuous distillation in tray columns. The ideal contacting stage. McCabe-Thiele method. The minimum number of stages and the minimum reflux ratio calculation. Tray distillation columns design. Tray Column Efficiency.

3. Sedimentation. Stokes law and limitations in its applicability. Gravitational and centrifugal field. Industrial and laboratory centrifuges. Scale-up. Ultracentrifugation. Thickeners. Flocculation.

4. Drying. Classification of drying processes. Drying equipment. Equilibrium moisture content. Bound and unbound moisture in the solid. Free moisture in the solid. Drying rate curve. Methods of calculation.

• - (Teste teórico 1 + Teste teórico 2 + Teste teórico 3 + Teste teórico 4)/4 - 100.0%

NAO

1. Azevedo E. G. e Alves A. M. (2009) Engenharia de Processos de Separação. IST Press.

2. Coulson, J. M. e Richardson, J. F., (1968) “Chemical Engineering”, vol. 2, 2ª ed., Pergamon Press Inc., USA

3. Foust, A. S., Wenzel, L. A., Clump, C. W. Maus, L., Anderson, L. B., (1980) “Principles of Unit Operations”, 2ª ed., John Wiley & Sons, Inc., USA.

4. Geankoplis, Christie J. (2003) “Transport processes and separation process principles (includes unit operations)”. 4ª ed., Prentice Hall PTR.

5. Harrison R. G., Todd P., Rudge S. R. e Petrides D. P. (2001) Unit Operations of Chemical Engineering”, 6ª ed., Mc Graw-Hill.

6. Ibarz A. e Barbosa-Cánovas G. V. (2003) “Unity Operations in Food Engineering”, Food Preservation Technology Series, CRC Press, Boca Raton, Florida, USA.

7. McCabe, W.L.; Smith, J.C. e Harriott, P. (2001) Unit Operations of Chemical Engineering”, 6ª ed., Mc Graw-Hill.

8. Seader, J. D. e Henley, E. J. (2006) Separation Process Principles. 2ª ed. John Wiley & Sons Inc.m