Thermodynamic Properties of Dimethyl Carbonate

Published

December 27, 2011

Author(s)

Yong Zhou, Jiangtao Wu, Eric Lemmon

Abstract

A thermodynamic property formulation for dimethyl carbonate has been developed with the use of available experimental thermodynamic property data. The equation of state was developed with multi-property fitting methods involving single-phase pressure-volume-temperature (pvT), heat capacity, vapor pressure, and saturated liquid density data. The equation of state conforms to the Maxwell criterion for two-phase liquid-vapor equilibrium states, and is valid for temperatures from the triple point temperature (277.06 +/- 0.63 K) to 400 K and for pressures up to 60 MPa, and for densities up to 12 mol.dm-3. The extrapolation behavior of the equation of state at low and high temperatures and high pressures is reasonable. The uncertainties (k=2, indicating a confidence level of 95 %) of the equation of state in density are 0.05% for saturated liquid states below 350 K, rising to 0.1 % in the single phase between 278 K and 400 K at pressures up to 60 MPa. Due to the lack of reilable data outside this region, the estimated uncertainties increase to 0.5 % to 1 % in the vapor and critical regions. The uncertainties in vapor pressure are 0.6 % from 310 K to 400 K, and increase to 1 % at higher temperatures and to 2 % at lower temperatures due to a lack of experimental data. The uncertainty in isobaric heat capacity and speed of sound in the liquid phase at saturation or atmospheric pressure is 0.5 % from 280 K to 335 K. The uncertainties are higher for all properties in the critical region. Detailed comparisons between experimental and calculated data, and an analysis of the equation, have been performed in this work.

Citation

J. Phys. & Chem. Ref. Data (JPCRD) -

Volume

40

Issue

4

NIST Pub Series

J. Phys. & Chem. Ref. Data (JPCRD)

Pub Type

NIST Pubs

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Keywords

dimethyl carbonate, ECS, equation of state, thermodynamic properties

Citation

Zhou, Y. , Wu, J. and Lemmon, E. (2011), Thermodynamic Properties of Dimethyl Carbonate, 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=906000 (Accessed April 28, 2024)