Extension of a Group Contribution Method to Predict Viscosity Based on Momentum Transport Theory Using a Modified Peng-Robinson EoS

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    Abstract

    In this work, a semitheoretical model based on the momentum transport theory is generalized through the development of a group contribution method. Viscosity data for temperatures between 13.95 and 950 K and pressures from 1.00 × 10-3 bar up to 1.00 × 104 bar were used to develop and to validate the model. To perform viscosity calculations, the model requires density and residual enthalpy that were obtained from a modified Peng-Robinson equation of state. Also, the model has one adjustable parameter that can be estimated form the group contribution method. Viscosity was calculated for 256 substances including 95 non-polar and 161 polar compounds. In total, 23 organic families were considered. Average deviations below 6.67% were calculated. The performance of the model was compared with those of other models reported in the literature. Calculations were carried out to include the saturation and single-phase regions. In general, it can be considered that the proposed model describes viscosity adequately using only one adjustable parameter.

    Original languageEnglish
    Pages (from-to)14903-14926
    Number of pages24
    JournalIndustrial and Engineering Chemistry Research
    Volume60
    Issue number41
    DOIs
    StatePublished - 20 Oct 2021

    Bibliographical note

    Funding Information:
    The authors are grateful to the Ministry of Science, Technology, and Innovation in Colombia formerly known as Administrative Department of Science Technology and Innovation (Colciencias-Colombia) for the financial support through the program National Doctorates 727 of 2015.

    Publisher Copyright:
    © 2021 American Chemical Society. All rights reserved.

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