Thermodynamics and Separation


Content, progress and pedagogy of the module

Learning objectives


Students who have passed the module should be able to

  • Explain the concept of thermodynamic state and of state variable
  • Explain subcritical and supercritical states
  • Describe the concept of degree of freedom of a thermodynamic system and the Gibbs phase rule
  • Explain the concept of volumetric equations of state (EOS)
  • Account for ideal gas EOS, virial EOS, correlations based on the corresponding state theorem, cubic EOS (van der Waals, Redlich-Kwong, Soave-Redlich-Kwong, Peng-Robinson)
  • Describe application of EOS to pure components and to mixtures
  • Explain first and second law of thermodynamics
  • Explain thermodynamic potentials (U, H, A, G)
  • Account for the concept of sensible and latent heat
  • Explain expressions for the dependency of the vapour pressure of a pure liquid on temperature
  • Describe heat exchangers
  • Explain isenthalpic valve expansions
  • Account for compressors and turbines
  • Account for vapour (gas) - liquid equilibrium (VLE) for mixtures
  • Explain diagrams for representing VLE for binary mixtures
  • Explain phase envelopes
  • Account for vapour (gas) – liquid 2-phase separators
  • Explain liquid – liquid equilibria (LLE)
  • Explain vapour (gas) – liquid – liquid (VLLE) equilibria
  • Explain diagrams for representing LLE and VLLE for binary mixtures
  • Account for vapour (gas) – liquid – liquid 3-phase separators


  • Calculate mass balances for steady and unsteady systems
  • Apply PV and PT state diagrams for pure fluids
  • Calculate volumetric properties of pure fluids and fluid mixtures
  • Calculate thermodynamic properties for pure fluids and fluid mixtures on the basis of the thermodynamic potentials
  • Calculate vapour pressure for pure liquids
  • Calculate energy balances for closed and open systems
  • Apply energy balances on the basic design of heat exchangers, expansion valves, compressors and turbines
  • Calculate bubble/dew point pressures and bubble/dew point temperatures for mixtures
  • Calculate PT-Flash, αP-Flash, αT-Flash and PH-Flash for mixtures
  • Apply flash calculations to the basic design of vapour (gas) – liquid separators
  • Calculate azeotropes and heteroazeotropes
  • Apply flash calculations to the basic design of vapour (gas) – liquid – liquid separators
  • Determine the thermodynamic state of a system of given composition at given pressure and temperature


  • Select and use of appropriate diagrams and EOS to describe the volumetric behaviour of fluids, with specific regard to reservoir fluids
  • Formulate separation problems in terms of thermodynamic equations

Type of instruction

  • Lectures, practical exercises, group and individual instructions

Extent and expected workload

150 hours



Name of examThermodynamics and Separation
Type of exam
Written exam
Assessment7-point grading scale
Type of gradingInternal examination
Criteria of assessmentThe criteria of assessment are stated in the Examination Policies

Facts about the module

Danish titleTermodynamik og separation
Module codeK-KT-K1-10
Module typeCourse
Duration1 semester
Language of instructionEnglish
Empty-place SchemeYes
Location of the lectureCampus Esbjerg
Responsible for the module


Study BoardStudy Board of Biotechnology, Chemistry and Environmental Engineering
DepartmentDepartment of Chemistry and Bioscience
FacultyFaculty of Engineering and Science