Viscosity and Density of Five Hydrocarbon Liquids at Pressures up to 200 MPa and Temperatures up to 473 K

Abstract

We report the results of simultaneous measurements of the viscosity and density of five pure hydrocarbon liquids (octane, decane, 1,3-dimethylbenzene, 1,2,3,4-tetrahydronaphthalene and 1-methylnaphthalene) at temperatures between 298.15 K and 473.15 K and at pressures ranging from 0.1 MPa to approximately 200 MPa. The measurements were made with a vibrating-wire instrument and the estimated expanded relative uncertainties are ±2 % for viscosity and ±0.2 % for density with a coverage factor of 2. The densities were correlated by means of a modified Tait equation, while the viscosities were correlated both with the theory of Dymond and Assael and in terms of an empirical function of temperature and pressure. We also present correlations of the viscosity of dodecane and octadecane based on results that we published previously [Caudwell, et al., Int. J. Thermophys. 2004, 25, 1340-1352. Extensive comparisons with literature data are presented.

Reference Correlation of the Viscosity of meta-Xylene from 273 to 673 K and up to 200 MPa

“…Similar qualitative behavior was observed for p-xylene. 17 However at 298 K the Mamedov et al 34,35 data are consistent with other data, see Figure 3, and at 423 K and 473 K, see Figure 6, the agreement with Caudwell et al 71 17 toluene, 18 and nheptane, 96 indicates the deviations on average of better than 0.5 % when compared with the most recent reference correlations for these fluids. The inclusion of their data set increased the high temperature limit from 353 K to 408 K and allowed further comparison with Mamedov data.…”

“…There is no theoretical guidance for the residual-viscosity contribution and hence the existence of accurate experimental data covering a wide range of temperature and pressure is paramount for 71 We observe that data of Mamedov et al 34,35 at temperatures (303 to 373) K lays approximately 2-4 % below the data of other workers, with deviations increasing as we approach the liquid saturation line. Similar qualitative behavior was observed for p-xylene.…”

An Assessment of Research Needs Related to Improving Primary Cement Isolation of Formations in Deep Offshore Wells

“…The velocity profile for the third window is very close to the one for the distance between the second and third window indicating that the ball reaches the terminal velocity after passing the second window. Figure 14 [12] shows the results for the calibration constant K determined for a diameter ratio of 0.995 at three different temperatures 293 K, 323 K, and 373 K. Preliminary viscosity results, shown in Figure 15, for n-decane at 294 K (21°C) obtained with the viscometer constant K determined for a diameter ratio of 0.998 and tilting angle of 20 o . The measured viscosity data at 294 K (21°C) are consistent with the literature data at a slightly higher temperature [12].…”

“…Figure 14 [12] shows the results for the calibration constant K determined for a diameter ratio of 0.995 at three different temperatures 293 K, 323 K, and 373 K. Preliminary viscosity results, shown in Figure 15, for n-decane at 294 K (21°C) obtained with the viscometer constant K determined for a diameter ratio of 0.998 and tilting angle of 20 o . The measured viscosity data at 294 K (21°C) are consistent with the literature data at a slightly higher temperature [12]. The pressure and temperature effects on the ball-tube diameter ratio d ball /D tube was studied and found that by increasing the pressure, the ratio decreases.…”

High-Pressure Viscosity Measurements of 1,1,1,2-Tetrafluoroethane

“…Reference viscosities measured with a vibrating wire viscometer are available for n-octane [25] for a wide range of temperatures and pressures to 200 MPa. Caudwell et al compared their results with the correlation by Huber et al [26], which was developed based on a critical review of the available literature data.…”