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Title: Reference Correlation for the Viscosity of Carbon Dioxide

Abstract

A comprehensive database of experimental and computed data for the viscosity of carbon dioxide (CO 2) was compiled and a new reference correlation was developed. Literature results based on an ab initio potential energy surface were the foundation of the correlation of the viscosity in the limit of zero density in the temperature range from 100 K to 2000 K. Guided symbolic regression was employed to obtain a new functional form that extrapolates correctly to T → 0 K and to 10 000 K. Coordinated measurements at low density made it possible to implement the temperature dependence of the Rainwater-Friend theory in the linear-in-density viscosity term. The residual viscosity could be formulated with a scaling term ργ/T the significance of which was confirmed by symbolic regression. The final viscosity correlation covers temperatures from 100 K to 2000 K for gaseous CO 2, and from 220 K to 700 K with pressures along the melting line up to 8000 MPa for compressed and supercritical liquid states. The data representation is more accurate than with the previous correlations, and the covered pressure and temperature range is significantly extended. The critical enhancement of the viscosity of CO 2 is included in the newmore » correlation.« less

Authors:
 [1];  [1]
  1. National Inst. of Standards and Technology (NIST), Boulder, CO (United States)
Publication Date:
Research Org.:
National Inst. of Standards and Technology (NIST), Boulder, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1463125
Grant/Contract Number:  
FE0003931
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physical and Chemical Reference Data
Additional Journal Information:
Journal Volume: 46; Journal Issue: 1; Journal ID: ISSN 0047-2689
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Laesecke, Arno, and Muzny, Chris D. Reference Correlation for the Viscosity of Carbon Dioxide. United States: N. p., 2017. Web. doi:10.1063/1.4977429.
Laesecke, Arno, & Muzny, Chris D. Reference Correlation for the Viscosity of Carbon Dioxide. United States. doi:10.1063/1.4977429.
Laesecke, Arno, and Muzny, Chris D. Tue . "Reference Correlation for the Viscosity of Carbon Dioxide". United States. doi:10.1063/1.4977429. https://www.osti.gov/servlets/purl/1463125.
@article{osti_1463125,
title = {Reference Correlation for the Viscosity of Carbon Dioxide},
author = {Laesecke, Arno and Muzny, Chris D.},
abstractNote = {A comprehensive database of experimental and computed data for the viscosity of carbon dioxide (CO2) was compiled and a new reference correlation was developed. Literature results based on an ab initio potential energy surface were the foundation of the correlation of the viscosity in the limit of zero density in the temperature range from 100 K to 2000 K. Guided symbolic regression was employed to obtain a new functional form that extrapolates correctly to T → 0 K and to 10 000 K. Coordinated measurements at low density made it possible to implement the temperature dependence of the Rainwater-Friend theory in the linear-in-density viscosity term. The residual viscosity could be formulated with a scaling term ργ/T the significance of which was confirmed by symbolic regression. The final viscosity correlation covers temperatures from 100 K to 2000 K for gaseous CO2, and from 220 K to 700 K with pressures along the melting line up to 8000 MPa for compressed and supercritical liquid states. The data representation is more accurate than with the previous correlations, and the covered pressure and temperature range is significantly extended. The critical enhancement of the viscosity of CO2 is included in the new correlation.},
doi = {10.1063/1.4977429},
journal = {Journal of Physical and Chemical Reference Data},
number = 1,
volume = 46,
place = {United States},
year = {2017},
month = {3}
}

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Works referenced in this record:

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