PVT Measurements for Toluene in the Near-Critical and Supercritical Regions

Published

July 19, 2001

Author(s)

Asbat E. Bazaev, Ilmutdin Abdulagatov, Joe W. Magee, Emil Bazaev, Michail Rabezkii

Abstract

The PVT relationships of toluene were measured in the near-critical and supercritical regions. Measurements were made using a constant-volume peizometer immersed in a precision thermostat. The volume of the piezometer V_PT was corrected for both temperature and pressure expansions. The temperature was measured with as 10 Ω} platinum resistance thermometer (PRT-10) with an uncertainty of 10 mK. Pressure was measured by means of a dead-weight gauge with an uncertainty of (0.0015 to 0.002) MPa. Uncertainties of the density measurements are estimated to be (0.05 to 0.10)%, depending on the experimental pressure and temperature. The volume of the piezometer V_PT was calibrated using a reference fluid (water) with well-known PVT properties at various temperatures and pressures. Measurements were made along various near-critical and supercritical isotherms between (591 and 673) K at pressures from (4 to 36) MPa. The measured PVT data for toluene were compared with values calculated from equations of state and previous measurements of other authors. The accuracy of the method was confirmed by PVT measurements for pure water in the critical and supercritical regions.

Citation

Journal of Chemical and Engineering Data

Volume

46

Issue

5

Pub Type

Journals

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Citation

Bazaev, A. , Abdulagatov, I. , Magee, J. , Bazaev, E. and Rabezkii, M. (2001), PVT Measurements for Toluene in the Near-Critical and Supercritical Regions, Journal of Chemical and Engineering Data, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50133 (Accessed September 20, 2024)