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Unit Operations

Code 8649
Year 3
Semester S2
ECTS Credits 6
Workload TP(60H)
Scientific area Industrial Chemistry
Entry requirements --
Mode of delivery Classroom teaching
Work placements Not applicable
Learning outcomes In this CU it is intended that:
1. The student learn how to identify the different unit operations from the chemical industry, classify them
based on physical-chemical principles and transport phenomena involved, know their design variables and
calculation methodology.
At the end of the CU students should be able to:
2. Perform size analysis of particulate solids and understand the concept of Bond diameter.
3. Understand the movement of particles in a fluid and determine the settling rate.
4. Know the different types of filters and apply filtration basic equations.
5. Understand leaching and liquid-liquid extraction and write balances and equilibrium relations to
determine the number of stages to achieve a specific yield.
6. Characterize gas-vapour systems and use psychrometric charts.
7. Understand vapour-liquid equilibrium and write equilibrium equations and mass balances to determine
the number of theoretical plates in distillation or gas absorption columns.
Syllabus 1. Unit Operations in Chemical Engineering.
2. Operations with granular solids – Milling and sieving: form factor, medium and Bond diameters, sieving
analysis, milling energy.
3. Solid-fluid separation – Sedimentation: basic equations for settling rate of large and small sized
particles; Filtration: Filters type, filtration modes and basic equations.
4. Bleaching and Liquid-liquid extraction with immiscible solvents: Nomenclature, equilibrium equations
and mass balances.
5. Humidification and drying: humidity indexes, wet and dry bulb temperatures, psychrometric charts, air
6. Gas absorption and striping: Whitman theory, film coefficients, mass balances.
7. Distillation: liquid mixtures, activity coefficients and relative volatility, operation and equilibrium curves,
placement of the feed plate, theoretical plates.
Main Bibliography M. Fátima Costa Farelo; Ana M. Carreira Lopes,"Processos de Separação", UBI, Covilhã.
Azbel, D.S.; N. Cheremisinoff, "Fluid Mechanics and Unit Operations", Ann Arbour Science, The
Butterworth Group.
Coulson, J.M.; Richardson, J.F., "Tecnologia Química", vol. II (Operações Unitárias), F. Calouste
Gulbenkian ed., Lisbon.
Coulson, J. M.; Richardson, J.F., "Tecnologia Química" , vol III, F. Calouste Gulbenkian ed., Lisbon.
Foust, A.S.; Wenzel, L.A., Clump, C.W.; Maus, L.; Andersen, L.B.; "Principles of Unit
Gomide, R.; "Operações Unitárias", 1 º volume (Operações com Sólidos Granulares).
Gomide, R.; "Operações Unitárias", 3 º volume (Separações Mecânicas).
Language Portuguese. Tutorial support is available in English.
Last updated on: 2021-03-05

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