NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
PVT Measurements for Toluene in the Near-Critical and Supercritical Regions
Published
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 VPT 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 VPT 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.
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 October 12, 2025)