Research of multicomponent hydrocarbon systems separation in modes of functioning of oil preliminary preparation equipment

Eugenii V. Nikolayev, Sergey N. Kharlamov

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The techniques of separation driving in rheologically complex hydrocarbon media, which are based on modern multiparametric models, are topical and form a basis for obtaining valuable empirical information on multicomponent viscous media flow. Therefore, the research field, related to prediction of phenomena and regularities of separation, is relevant and practically significant for design and operation of equipment for oil and gas preliminary preparation. The main aim of the study is to determine the regularities of separation in hydrocarbon media within the framework of equilibrium thermodynamics; to give recommendations for practice of applied calculations of component composition under separation of multicomponent mixture at following thermobaric conditions: the temperature is T≅0-70°C and pressure is P≅50-700 kPa. The methods used in the study: thermodynamic models in HYSYS software such as Peng-Robinson equation of state, Lee-Kesler-Ploc-ker equation of state, NRTL equation, Grayson-Streed semi-empirical model; method of statistical mechanics (Chapman-Enskog method); method of corresponding state (Golubevfs method); similarity theory. The results. The authors have studied the features of separation modeling in hydrocarbon media within the thermodynamic equilibrium and discussed the approaches to calculation of phase equilibrium in multicomponent systems. Regularities and peculiarities of changes in structure of gas mixture depending on temperature and pressure were studied. It was shown that for some separation modes there are conditions of non-monotonic change of structure with extremums that influence significantly the physical properties and intensity of exchange processes of heat and mass transfer in multicomponent hydrocarbon media. The authors calculated thermal and physical properties of gas mixture by different methods. The results were compared with the data obtained by the program Aspen HYSYS and with the experimental data.

Original languageEnglish
Pages (from-to)84-99
Number of pages16
JournalBulletin of the Tomsk Polytechnic University, Geo Assets Engineering
Issue number7
Publication statusPublished - 2016


  • Hydrocarbon media
  • Modeling
  • Multicomponent system
  • Separation
  • Thermal and physical properties
  • Thermodynamics

ASJC Scopus subject areas

  • Economic Geology
  • Geotechnical Engineering and Engineering Geology
  • Fuel Technology
  • Management, Monitoring, Policy and Law
  • Waste Management and Disposal
  • Materials Science (miscellaneous)

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