Adaptive model reduction and simulation of thermal cracking of multicomponent hydrocarbon mixtures

Heiko Briesen, Wolfgang Marquardt

Research output: Contribution to journalConference articlepeer-review

9 Scopus citations

Abstract

Because of the high dimensionality and the high degree of coupling the simulation of multicomponent mixture processes requires a suitable technique for model size reduction to facilitate the numerical solution if the mixture comprises a large number of components. Established techniques of pseudo- component lumping group (lump) the chemical species by introducing pseudo-components and formulate reaction kinetics for these fictitious components. The introduced error associated with this procedure can neither be estimated nor controlled. A continuous compositional representation of the mixture introduces more flexibility in the model size reduction. Using a Galerkin discretization scheme in combination with a wavelet-based error control and adaptation strategy a model size reduction technique is introduced which allows the specification of a desired accuracy. A simple example representing the thermal cracking of a hydrocarbon mixture modeled by means of the breakage equation is used to illustrate the new method. (C) 2000 Elsevier Science Ltd.

Original languageEnglish
Pages (from-to)1287-1292
Number of pages6
JournalComputers and Chemical Engineering
Volume24
Issue number2-7
DOIs
StatePublished - 15 Jul 2000
Externally publishedYes
Event7th International Symposium on Process Systems Engineering - Keystone, CO, USA
Duration: 16 Jul 200021 Jul 2000

Keywords

  • Adaptive discretization
  • Breakage equation
  • Galerkin scheme
  • Lumping
  • Model size reduction
  • Population balance

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