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Isochoric p-ρ-T Measurements on (x) CO2 + (1-x) C2H6, xapproximately equal to} 0.25, 0.49, 0.74} From 200 to 400 K at Pressures to 35 Mpa



H Duarte, Joe W. Magee


The p-p-T relationships were measured for binary hydrocarbon mixtures containing carbon dioxide (CO2) and ethane (C2H6). Temperatures ranged from 200 K to 400 K with pressures up to 35 MPa. Measurements of p-p-T were conducted on compressed gaseous and liquid samples with the mole fraction compositions (x) CO2 + (1-x) C2H6} for x = 0.25168, 0.49233, and 0.73979. These mixtures were prepared gravimetrically to match, within 0.000 12 mole fraction, the compositions (0.251 66, 0.492 45, 0.739 78) of three mixtures which had been used by three labororatories for measurements of key thermophysical properties, including the density. For the p-p-T apparatus used in this study, the uncertainty of the temperature is 0.03 K, and for pressure it is 0.01% at p > 3 MPa and 0.05% at p < 3 MPa. The principal source of uncertainty in density is the cell volume (28.5 cm3) whose standard uncertainty is 0.003 cm3. When all components of experimental uncertainty are considered, the expanded relative uncertainty (with a coverage factor k=2 and thus a two-standard-deviation estimate) of the density measurementsis estimated to be 0.05%.
Journal of Chemical and Engineering Data
No. 5


carbon dioxide, density, ethane


Duarte, H. and Magee, J. (2001), Isochoric p-&#961;-T Measurements on {(x) CO<sub>2</sub> + (1-x) C<sub>2</sub>H<sub>6</sub>, x{approximately equal to} 0.25, 0.49, 0.74} From 200 to 400 K at Pressures to 35 Mpa, Journal of Chemical and Engineering Data (Accessed June 21, 2024)


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Created September 30, 2001, Updated October 12, 2021