Supplementary measurements of the (p,ρ,T) relation of carbon dioxide in the homogeneous region atT=313 K and on the coexistence curve atT=304 K

Measurements of the(p,ρ,T) relation of methane and carbon dioxide in the temperature range 240 K to 520 K at pressures up to 30 MPa using a new accurate single-sinker densimeter

“…In the overlapping region, for temperatures from 240 K to 360 K at pressures p 13 MPa, our new ( p, ρ, T ) measurements agree excellently, within |1 · 10 −4 · ρ|, with the high-accuracy measurements of Duschek et al, (5) Gilgen et al, (7) and Nowak et al (8) (see table 4). The apparatus used for these measurements was the two-sinker densimeter (13,14) of our group.…”

“…The results in this overlapping region can be compared with highly accurate measurements on methane previously carried out by Kleinrahm et al, (18) Händel et al, (19) and Nowak et al (20) and on carbon dioxide carried out by Duscheck et al, (5) Gilgen et al, (7) and Nowak et al (8) (18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35) together with their uncertainties is listed in table 3. The experimental results of further authors were considered, but not selected for comparison because of wide scatter, systematic deviations, and a small number of measured points, respectively.…”

“…(36) The first temperature value given above each diagram corresponds to our measurements, and the temperature range written in parentheses covers the results of the other experimentalists. A summary of the selected sets of measurements (5,(7)(8)(9) (2) •, this work; , Michels and Michels; (37) , Michels et al; (38) ∇, Reamer et al; (40) I , Vukalovich and Altunin; (41) ·, Vukalovich and Altunin; (42) I, Vukalovich et al; (43) , Golovskii and Tsymarnyi; (46) +, Kirillin et al; (47) · , Kirillin et al; (50) · , Popov and Sayapov et al; (51) · , Vukalovich et al; (52) , Schönmann; (53) ×, Kholodov et al; (54) •, Kholodov et al; (55) , Lau; (57) £, Esper; (58) , Holste et al; (59) , Jaeschke (60) (optical measurements); , Jaeschke (61) (Burnett measurements); , Ely et al; (62) , Duschek et al; (5) , Gilgen et al; (7) (54) 1972 141 293 to 363 0.5 to 4.8 0.14 to 0.16 Kholodov et al (55) 1972 85 243 to 283 0.5 to 4.4 0.14 to 0.16 Levelt Sengers and Chen (56) 1972 22 304 to 319 7.4 to 10…”

“…Literature studies showed, however, that the data situation with respect to high-accuracy ( p, ρ, T ) measurements was insufficient. In order to set up a reliable ( p, ρ, T ) data set for the most essential regions of the fluid state, comprehensive measurements on carbon dioxide were carried out in our group (5)(6)(7)(8) in the 1990s. The ( p, ρ, T ) measurements on carbon dioxide presented in this paper complete these experimental projects.…”

Multiparameter crossover equation of state: Generalized algorithm and application to carbon dioxide

“…High quality PρT data sets for carbon dioxide [37][38][39][40] are available in the region with pressures up to 13 MPa and temperatures up to 360 K. Figs. 2 and 3 show that the rep- [41,42], the representation of the data by MC EOS is similar to SW EOS except in the region of 337 K ≤ T ≤ 344 K, as shown in Fig.…”