P-ρ-T Data for Carbon Dioxide from (310 to 450) K up to 160 MPa

Abstract

This paper presents P-F-T data for pure carbon dioxide measured with a high-pressure single-sinker magnetic suspension densimeter (MSD). The data cover four isotherms (310, 350, 400, 450) K. The MSD technique yields data with less than 0.03 % relative uncertainty over the pressure range of (10 to 200) MPa. A comparison of the experimental data to the equation of state developed by Span and Wagner indicates that the equation and the data are consistent within the low range of pressure. The reference equation has a relative uncertainty of ( 0.03 % to ( 0.05 % below 30 MPa. At higher pressures, the density predictions of this model agree with the experimental data with a maximum relative deviation of 0.1 %.

Nonadditive three-body potential and third to eighth virial coefficients of carbon dioxide

“…Third virial coefficient B 3 as a function of temperature obtained in this work at three different levels of theory as well as B 3 values calculated by Schultz et al, 53 B 3 values derived from the experimentally based SWEOS, 45 and selected experimental B 3 data. [54][55][56][57][58][59][60] Schultz et al 53 obtained their B 3 values using the same pair potential as in the present work 9 including the QFH correction. To account for nonadditive three-body interactions, they used an isotropic ATM term and a single polarizable site with isotropic polarizability.…”

“…3 53 B 3 values derived from the experimentally based SWEOS, 45 and selected experimental B 3 data. [54][55][56][57][58][59][60] The values of Vukalovich and Masalov 54 are those quoted in Ref. 61.…”

“…The experimental B 3 data of Holste et al, 55 Jaeschke, 56 Duschek et al, 57 Di Nicola et al, 58 and Mantilla et al 59 agree well with the calculated B QFH 3,nadd values above room temperature, whereas the maximum of B 3 at about 270 K is distinctly more pronounced in the experimental data of Holste et al 55 and Estrada-Alexanders et al 60 Figure 4 shows the B cl n,add (T ) and B QFH n,nadd (T ) curves obtained using Eq. (23) for n = 4 to n = 7.…”

High-precision virial coefficients of argon and carbon dioxide from integration of speed of sound data in the pressure–temperature domain

“…Absolute deviation, with respect to the new determination C num of this work, of formerly-reported data for the third virial coefficient of carbon dioxide. The symbols indicate the source: filled squares [46], down-pointing emtpy triangles [54], empty diamonds [55], clubs [56], empty squares [47], empty circles [57], hearts [60], spades [58], downpointing solid triangles [49], filled circles [42], crosses [51], solid diamonds [52], up-pointing solid triangles [59] and uppointing empty triangles [53]. The solid lines indicate the uncertainty of C num .…”

“…Absolute deviation, with respect to the new determination B num of this work, of formerly-reported data for the second virial coefficient of carbon dioxide as given by Dymond et al [25]. The symbols indicate the source: filled squares [46], empty squares [47], empty circles [48], filled circles [49], crosses [50], solid diamonds [42], solid triangles [51], open diamonds [52], and open triangles [53]. The solid lines indicate the uncertainty of B num .…”