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Reference Correlation of the Thermal Conductivity of o-Xylene, m-Xylene, p-Xylene, and Ethylbenzene from the Triple Point to 700 K and Moderate Pressures

Published

Author(s)

Sofia K. Mylona, K.D. Antoniadis, Marc J. Assael, Marcia L. Huber, Richard A. Perkins

Abstract

This paper contains new, representative reference equations for the thermal conductivity of o-, m-, p- xylene and ethylbenzene. The equations are based upon a body of experimental data that has been critically assessed for internal consistency and for agreement with theory. In the case of the dilute-gas thermal conductivity, a theoretically based correlation was adopted in order to extend the temperature range of the experimental data. In the critical region, the experimentally observed enhancement of the thermal conductivity is well represented by theoretically based equations containing just one adjustable parameter. All four correlations are applicable for the temperature range from the triple point of each fluid, to 700 K, and an upper pressure limit determined by the maximum density limit for the equation of state used to provide density. At the upper temperature limit of 700 K, the maximum pressure was 200 MPa for m-xylene and p-xylene, but 60 MPa and 70 MPa for ethylbenzene and o-xylene, respectively. At lower temperatures, the maximum pressure is lower. For o-xylene, we estimate the uncertainty for liquid and supercritical densities for temperatures from the triple point to 400 K, to be 2.5%, and 4 % at higher temperatures, and in the dilute gas region we estimate the uncertainty to be 2%. For m-xylene, the estimated uncertainty for liquid and supercritical densities at temperatures from the triple point to 375 K, is 3%, and 5% at higher temperatures, and 7% for the dilute gas. For p-xylene, the estimated uncertainty for liquid and supercritical densities at temperatures from the triple point to 700 K, is 4 %, and 5% for the dilute gas. Finally, for ethylbenzene the estimated uncertainty for liquid and supercritical densities at temperatures from the triple point to 400 K is 2.5%, and 4% in the dilute gas region.
Citation
J. Phys. & Chem. Ref. Data (JPCRD) -
Volume
43
Issue
4

Keywords

critical phenomena, ethylbenzene, thermal conductivity, transport properties, xylene.

Citation

Mylona, S. , Antoniadis, K. , Assael, M. , Huber, M. and Perkins, R. (2014), Reference Correlation of the Thermal Conductivity of o-Xylene, m-Xylene, p-Xylene, and Ethylbenzene from the Triple Point to 700 K and Moderate Pressures, J. Phys. & Chem. Ref. Data (JPCRD), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=916518 (Accessed February 24, 2024)
Created November 20, 2014, Updated October 12, 2021