articleIndustrial & Engineering Chemistry ResearchOct 1, 2002Closed access

Application of the Perturbed-Chain SAFT Equation of State to Associating Systems

JGJoachim GroßGSGabriele Sadowski

TU Dortmund University · Technische Universität Berlin

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Abstract

The perturbed-chain SAFT (PC−SAFT) equation of state is applied to pure associating components as well as to vapor−liquid and liquid−liquid equilibria of binary mixtures of associating substances. For these substances, the PC−SAFT equation of state requires five pure-component parameters, two of which characterize the association. The pure-component parameters were identified for 18 associating substances by correlating vapor pressure and liquid density data. A comparison to an earlier version of SAFT confirms the good results for pure substances. When only one associating compound is present in a mixture, the PC−SAFT equation of state does not require mixing rules for the association term. Using one binary…

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Topics & keywords

Topics
Keywords
  • Equation of state
  • Thermodynamics
  • Binary number
  • Flory–Huggins solution theory
  • Component (thermodynamics)
  • Mixing (physics)
  • Chemistry
  • Liquid liquid
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