Densities of Toluene, Carbon Dioxide, Carbonyl Sulfide, and Hydrogen Sulfide over a Wide Temperature and Pressure Range in the Sub- and Supercritical State

Ihmels, E. Christian; Gmehling, Jürgen

doi:10.1021/ie001135g

Cited by 142 publications

(161 citation statements)

References 11 publications

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“…The present measured mixture densities were accurately represented by a simple Taittype equation of state which was applied previously for pure fluids [16,[31][32][33][34][35]:…”

Section: Equation Of Statementioning

confidence: 99%

Densities and Excess, Apparent, and Partial Molar Volumes of Binary Mixtures of BMIMBF4 + Ethanol as a Function of Temperature, Pressure, and Concentration

et al. 2008

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The densities of five BMIMBF 4 (1-butyl-3-methylimidazolium tetrafluoroborate) + ethanol binary mixtures with compositions of (0.0701, 0.3147, 0.5384, 0.7452, and 0.9152) mole fraction BMIMBF 4 and of pure BMIMBF 4 have been measured with a vibrating-tube densimeter. Measurements were performed at temperatures from 298 K to 398 K and at pressures up to 40 MPa. The total uncertainty of density, temperature, pressure, and concentration measurements were estimated to be less than 0.1 kg · m −3 , 15 mK, 5 kPa, and 10 −4 , respectively. The uncertainties reported in this article are expanded uncertainties at the 95% confidence level with a coverage factor of k = 2. The measured densities were used to study derived volumetric properties such as excess, apparent, and partial molar volumes. It is shown that the values of excess molar volume for BMIMBF 4 + ethanol mixtures are negative at all measured temperatures and pressures over the whole concentration range. The effect of water content on the measured values of density is discussed. The volumetric (excess, apparent, and partial molar volumes) and structural (direct and total correlation integrals, cluster size) properties of dilute BMIMBF 4 + ethanol mixtures were studied in terms of the Krichevskii parameter. The measured densities were used to develop a Tait-type equation of state.

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“…The present measured mixture densities were accurately represented by a simple Taittype equation of state which was applied previously for pure fluids [16,[31][32][33][34][35]:…”

Section: Equation Of Statementioning

confidence: 99%

Densities and Excess, Apparent, and Partial Molar Volumes of Binary Mixtures of BMIMBF4 + Ethanol as a Function of Temperature, Pressure, and Concentration

et al. 2008

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“…The measurement system was developed in the Ph.D. dissertation of Ihmels [6]. The data for several liquids and liquefied gases (toluene, carbon dioxide, carbonyl sulfide, hydrogen sulfide, sulfur hexafluoride, dinitrogen monoxide, R227ea, and sulfur dioxide) have already been published [5][6][7][8]. Comparisons with reference equations of state for toluene, CO 2 , and SF 6 demonstrated the high accuracy and suitability of this measurement system for the measurement of fluid densities.…”

Section: Density Apparatusmentioning

confidence: 99%

“…For ease of use, the new vapor pressures and compressed liquid densities were correlated up to 388 K with the TRI-DEN model [5]-a combination of the Tait, Rackett, and Wagner equations. Along with the available literature data, the new measured data were used to develop a first comprehensive fundamental equation of state.…”

Section: Introductionmentioning

confidence: 99%

Experimental densities, vapor pressures, and critical point, and a fundamental equation of state for dimethyl ether

Ihmels

Lemmon

2007

Fluid Phase Equilibria

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“…Good correlation and prediction of densities of pure compounds are obtained using multiparameter EoS [1] and volume-explicit expressions [2,3]. These last expressions can be implemented easily, and their practical use is of great significance in the chemical industry; however, the evaluation of experimental density measurements, and perhaps any experimental measurements [4], has become of high importance in the scientific community.…”

Section: Introductionmentioning

confidence: 99%

Compressed Liquid Densities of 1-Pentanol and 2-Pentanol from 313 to 363 K at Pressures to 25 MPa

Zúñiga‐Moreno

Galicia‐Luna

2007

Int J Thermophys

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Compressed liquid densities of 1-pentanol and 2-pentanol have been measured from 313 to 363 K at pressures to 25 MPa. Measurements have been achieved using a vibrating tube densimeter. Water and nitrogen are the reference fluids to calibrate the densimeter. Measurements uncertainties are estimated to be ±0.03 K for temperatures, ±0.008 MPa for pressures and ±0.20 kg·m −3 for densities. Two volume-explicit equations with five and six parameters and the 11-parameter BWRS equation of state are used to correlate the experimental densities of 1-pentanol and 2-pentanol reported in this work. Statistical values for the evaluation of the correlations are reported. Comparisons with literature data are performed for the temperature and pressure ranges of the measurements.

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Densities of Toluene, Carbon Dioxide, Carbonyl Sulfide, and Hydrogen Sulfide over a Wide Temperature and Pressure Range in the Sub- and Supercritical State

Cited by 142 publications

References 11 publications

Densities and Excess, Apparent, and Partial Molar Volumes of Binary Mixtures of BMIMBF4 + Ethanol as a Function of Temperature, Pressure, and Concentration

Densities and Excess, Apparent, and Partial Molar Volumes of Binary Mixtures of BMIMBF4 + Ethanol as a Function of Temperature, Pressure, and Concentration

Experimental densities, vapor pressures, and critical point, and a fundamental equation of state for dimethyl ether

Compressed Liquid Densities of 1-Pentanol and 2-Pentanol from 313 to 363 K at Pressures to 25 MPa

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