Estimation of P-V-T behaviour of gas mixtures

Vladimíra Měřičková; Josef P. Novák; Jiří Pick

doi:10.1135/cccc19820371

Estimation of P-V-T behaviour of gas mixtures

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19820371 ◽

1982 ◽

Vol 47 (2) ◽

pp. 371-383

Author(s):

Vladimíra Měřičková ◽

Josef P. Novák ◽

Jiří Pick

Keyword(s):

Equation Of State ◽

Binary Mixtures ◽

Gas Mixtures

A review of methods is presented which allow to determine the P-V-T behaviour of gas mixtures. This review is based on the computations performed for about 2 200 P-V-T-X data of 12 binary mixtures. The method of combination of the equation-of-state constants, the Joffe method and the modified Bartlett rule proved to be the most suitable.

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Modeling phase equilibria for acid gas mixtures using the CPA equation of state. Part II: Binary mixtures with CO2

Fluid Phase Equilibria ◽

10.1016/j.fluid.2011.02.006 ◽

2011 ◽

Vol 306 (1) ◽

pp. 38-56 ◽

Cited By ~ 109

Author(s):

Ioannis Tsivintzelis ◽

Georgios M. Kontogeorgis ◽

Michael L. Michelsen ◽

Erling H. Stenby

Keyword(s):

Equation Of State ◽

Phase Equilibria ◽

Binary Mixtures ◽

Gas Mixtures ◽

Acid Gas

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Critical consolute point in hard-sphere binary mixtures: Effect of the value of the eighth and higher virial coefficients on its location

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc2009510 ◽

2010 ◽

Vol 75 (3) ◽

pp. 359-369 ◽

Cited By ~ 6

Author(s):

Mariano López De Haro ◽

Anatol Malijevský ◽

Stanislav Labík

Keyword(s):

Equation Of State ◽

Binary Mixtures ◽

Hard Sphere ◽

Hard Spheres ◽

Virial Coefficients ◽

Fluid Mixture ◽

Binary Fluid ◽

Virial Series ◽

Consolute Point ◽

Critical Constants

Various truncations for the virial series of a binary fluid mixture of additive hard spheres are used to analyze the location of the critical consolute point of this system for different size asymmetries. The effect of uncertainties in the values of the eighth virial coefficients on the resulting critical constants is assessed. It is also shown that a replacement of the exact virial coefficients in lieu of the corresponding coefficients in the virial expansion of the analytical Boublík–Mansoori–Carnahan–Starling–Leland equation of state, which still leads to an analytical equation of state, may lead to a critical consolute point in the system.

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Comparison of different models to calculate the viscosity of biogas and biomethane in order to accurately measure flow rates for conformity assessment

Scientific Reports ◽

10.1038/s41598-021-81052-7 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Karine Arrhenius ◽

Oliver Büker

Keyword(s):

Binary Mixtures ◽

Flow Rate ◽

Correction Method ◽

Gas Mixtures ◽

Conformity Assessment ◽

Flow Rates ◽

Unknown Composition

AbstractThe study presents an optimised method to correct flow rates measured with a LFE flowmeter pre-set on methane while used for gas mixtures of unknown composition at the time of the measurement. The method requires the correction of the flow rate using a factor based on the viscosity of the gas mixtures once the composition is accurately known. The method has several different possible applications inclusive for the sampling of biogas and biomethane onto sorbent tubes for conformity assessment for the determination of siloxanes, terpenes and VOC in general. Five models for the calculation of the viscosity of the gas mixtures were compared and the models were used for ten binary mixtures and four multi-component mixtures. The results of the evaluation of the different models showed that the correction method using the viscosity of the mixtures calculated with the model of Reichenberg and Carr showed the smallest biases for binary mixtures. For multi-component mixtures, the best results were obtained when using the models of Lucas and Carr.

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