Viscosity of Oxygenated Fuel: A Model Based on Eyring's Absolute Rate Theory

Chenyang Zhu, Feng Yang, Xiangyang Liu, Waheed Afzal, Maogang He (Corresponding Author)

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A viscosity model was proposed for oxygenated fuel components; it was based on Eyring’s absolute rate theory and a cubic equation of state Soave-Redlich-Kwong. The viscosity was associated with flow energy which could be divided into the activation energy and the vacancy-formation energy, and then a reference state for simplifying the calculation process was introduced in the present model. This work also reported a viscosity database at temperatures from 243.15 K to 413.15 K and pressures up to 200 MPa for 31 oxygenated fuel components containing alcohols, esters and ethers in order to verify the proposed model. The average absolute relative deviations between calculated and experimental data were lower than 2.37%. Furthermore, the free-volume model, which has a similar consideration of flow energy with this work, was chosen to further investigate the performance of the present model, and in general, the present model showed a better accuracy than the free-volume model. Finally, it was shown that the proposed model could be extended to the mixtures successfully.
Original languageEnglish
Pages (from-to)218-226
Number of pages9
JournalFuel
Volume241
Early online date17 Dec 2018
DOIs
Publication statusPublished - 1 Apr 2019

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Keywords

  • viscosity
  • Eyring's absolute rate theory
  • Flow energy
  • Oxygenated fuel
  • Free-volume model

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