Measurement of the (pressure, density, temperature) relation of two (methane+nitrogen) gas mixtures at temperatures between 240 and 400K and pressures up to 20MPa using an accurate single-sinker densimeter

Chamorro, César R.; Segovia, José J.; Martín, M. Carmen; Villamañán, Miguel A.; Estela-Uribe, Jorge F.; Trusler, J. P. Martin

doi:10.1016/j.jct.2005.10.004

Cited by 35 publications

(21 citation statements)

References 7 publications

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“…Unlike AGA8-DC92, the ECS-S1 model is also applicable to liquefied natural gas and associated (vapour + liquid) equilibrium problems. As a part of this project, measurements of density q were made on the mixtures with x = 0.1 and x = 0.2 [2]. Those measurements were made in the intervals 240 6 T/K 6 400 and 0.9 6 p/MPa 6 20.1 and have an uncertainty of less than ±0.02%.…”

Section: Discussionmentioning

confidence: 99%

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Speeds of sound in {(1−x)CH4+xN2} with x=(0.10001, 0.19999, and 0.5422) at temperatures between 170K and 400K and pressures up to 30MPa

Estela-Uribe

Trusler

Chamorro

et al. 2006

The Journal of Chemical Thermodynamics

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Section: Discussionmentioning

confidence: 99%

“…For two of the mixtures studied, precise pressuredensity-temperature measurements were also made and those results are presented in an accompanying paper [2].…”

Section: Introductionmentioning

confidence: 99%

Speeds of sound in {(1−x)CH4+xN2} with x=(0.10001, 0.19999, and 0.5422) at temperatures between 170K and 400K and pressures up to 30MPa

Estela-Uribe

Trusler

Chamorro

et al. 2006

The Journal of Chemical Thermodynamics

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“…The results confirmed the hypotheses that had been set up for this work. On the one hand, the overall improvement in the p T data prediction indicates a better representation of the density dependence carried [37]; ( ) 105,110,115,120,125,130,135 and 140 K at x1 = 0.69651 [31]; ( ) 299.47 K at x1 = 0.9800 [47]; ( ) 270 K at x1 = 0.80021 [34]; ( ) 323.15 K at x1 = 0.4999 [34]; ( ) 240 K at x1 = 0.89984 [49]; (᭹) 400 K at x1 = 0.89984 [49]; (+) 673.15 K x1 = 0.4000 [56]; ( ) 323.15 K at x1 = 0.3000 [55]; ( ) 573.15 K at x1 = 0.1000 [55]. For (CH4 + CO2): ( ) 270 K at x1 = 0.68550 [34]; ( ) 300 K at x1 = 0.68550 [34]; ( ) 300 K at x1 = 0.90010 [58]; (᭹) 320 K at x1 = 0.32393 [58]; (+) 300 K at x1 = 0.0200 [60]; ( ) 373.15 K at x1 = 0.9000 [55]; ( ) 573.15 K at x1 = 0.6000 [55].…”

Section: Comparison With Other Modelsmentioning

confidence: 99%

An improved Helmholtz energy model for non-polar fluids and their mixtures. Part 2: Application to mixtures of non-polar fluids

Estela-Uribe

2013

Fluid Phase Equilibria

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“…It allows precision density measurements of fluids over wide temperature and pressure ranges [14]. The single-sinker densimeter used in this work was especially designed for density measurements of pure gases and gaseous mixtures and has been previously described in detail by Chamorro et al [15] and further improved by Mondéjar et al [16].…”

Section: Apparatus Descriptionmentioning

confidence: 99%

Experimental determination of ( p , ρ , T ) data for binary mixtures of methane and helium

Hernández-Gómez

Tůma

Segovia

et al. 2016

The Journal of Chemical Thermodynamics

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The basis for the development and evaluation of equations of state for mixtures is experimental data for several thermodynamic properties. The quality and the availability of experimental data limit the achievable accuracy of the equation. Referring to the fundamentals of GERG-2008 wide-range equation of state, no suitable data were available for many mixtures containing secondary natural gas components.This work provides accurate experimental (p, ρ, T) data for two binary mixtures of methane with helium (0.95 (amount-of-substance fraction) CH 4 + 0.05 He and 0.90 CH 4 + 0.10 He). Density measurements were performed at temperatures between 250 K and 400 K and pressures up to 20 MPa by using a singlesinker densimeter with magnetic suspension coupling. Experimental data were compared with the corresponding densities calculated from the GERG-2008 and the AGA8-DC92 equations of state.Deviations from GERG-2008 were found within a 2 % band for the (0.95 CH 4 + 0.05 He) mixture but exceeded the 3 % limit for the (0.95 CH 4 + 0.05 He) mixture. The highest deviations were observed at 250 K and pressures between 17 and 19 MPa. Values calculated from AGA8-DC92, however, deviated from the experimental data by only 0.1 % at high pressures and exceeded the 0.2 % limit only at temperatures of 300 K and above, for the (0.90 CH 4 + 0.10 He) mixture. IntroductionThe knowledge of the thermophysical properties of natural gases and other related mixtures is an important feature for the performance of technical processes. Transportation, storage, and liquefaction processes in addition to design of equipment and other applications of natural gases require an accurate estimation of the thermodynamic properties of the individual mixture-forming components. Depending on the source and the application, several components may be present in natural gases at different compositions. The raw natural gas needs to be processed due to the quality specifications for its commercial use as a fuel. Thus, the separation of undesirable components (e.g., carbon dioxide, water or hydrogen sulfide) or the presence of other components (e.g., lower and higher hydrocarbons) is required.In addition, the growing interest in alternative sources of energy gases and the diversity of composition of these non-conventional fuels demands to consider other components with minority presence. For all this reasons, property calculations over wide ranges of mixture compositions and operating conditions in the homogeneous gaseous, liquid, and supercritical regions and for vapor-liquid equilibrium (VLE) states are required. These particular data can be calculated from equations of state. Different equations of state have been developed for various substances and applications, according to the requirements of precision and availability of experimental data. There are two main equations of state for estimating natural gas properties: AGA8-DC92 and GERG-2008. The first one was developed by Starling and Savidge with the support of the American Gas Association (AGA). The AGA8-DC9...

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Measurement of the (pressure, density, temperature) relation of two (methane+nitrogen) gas mixtures at temperatures between 240 and 400K and pressures up to 20MPa using an accurate single-sinker densimeter

Cited by 35 publications

References 7 publications

Speeds of sound in {(1−x)CH4+xN2} with x=(0.10001, 0.19999, and 0.5422) at temperatures between 170K and 400K and pressures up to 30MPa

Speeds of sound in {(1−x)CH4+xN2} with x=(0.10001, 0.19999, and 0.5422) at temperatures between 170K and 400K and pressures up to 30MPa

An improved Helmholtz energy model for non-polar fluids and their mixtures. Part 2: Application to mixtures of non-polar fluids

Experimental determination of ( p , ρ , T ) data for binary mixtures of methane and helium

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