Development of predictive methods of water-heavy oil phase equilibrium for supercritical water upgrading process

Shogo Teratani, Masaki Ota, Yoshiyuki Sato, Hiroshi Inomata

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Predictive methodology was developed for water-hydrocarbon systems under high temperature and pressure conditions based on reported phase equilibrium data using the Peng-Robinson equation of state (EOS) for vaporliquid equilibrium (VLE) and liquid-liquid equilibrium (LLE). The available experimental data for hydrocarbons with low molecular weight and interaction parameter, kij, with/without a size parameter, lij, included in the Peng-Robinson EOS were fitted to experimental data and accumulated for constructing a predictive equation for hydrocarbons with high molecular weight. As a result, lij was found to be negligible for VLE in water-hydrocarbon systems, and only the fitting parameter kij was necessary in some hydrocarbon and water systems. Consequently, prediction of VLE diagrams was possible using the estimated kij in the Peng-Robinson EOS for water-hydrocarbon systems under high temperature and pressure conditions.

Original languageEnglish
Pages (from-to)26-33
Number of pages8
JournalJournal of The Japan Petroleum Institute
Volume60
Issue number1
DOIs
Publication statusPublished - 2017

Keywords

  • Equation of state
  • Heavy oil
  • Phase equilibrium
  • Prediction
  • Supercritical water

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology

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