New equipment using a static analytic method for the study of vapour–liquid equilibria at temperatures down to 77 K

Baba-Ahmed, A.; Guilbot, P.; Richon, Dominique

doi:10.1016/s0378-3812(99)00294-0

Cited by 28 publications

(14 citation statements)

References 22 publications

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“…Regarding the three binary subsystems, the available experimental data base is much better and extensive VLE data can be found. For N 2 +O 2 , which consists of the two lower boiling components of the present ternary mixture, 15 publications are available [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Both components have very low critical temperatures, i.e.…”

Section: Experimental Datamentioning

confidence: 99%

Thermodynamic models for vapor–liquid equilibria of nitrogen+oxygen+carbon dioxide at low temperatures

Vrabec¹,

Kedia²,

Buchhauser³

et al. 2009

Cryogenics

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For the design and optimization of CO 2 recovery from alcoholic fermentation processes by distillation, models for vapor-liquid equilibria (VLE) are needed. Two such thermodynamic models, the Peng-Robinson equation of state (EOS) and a model based on Henry's law constants, are proposed for the ternary mixture N 2 +O 2 +CO 2 .Pure substance parameters of the Peng-Robinson EOS are taken from the literature, whereas the binary parameters of the Van der Waals one-fluid mixing rule are adjusted to experimental binary VLE data. The Peng-Robinson EOS describes both binary and ternary experimental data well, except at high pressures approaching the critical region. A molecular model is validated by simulation using binary and ternary experimental VLE data. On the basis of this model, the Henry's law constants of N 2 and O 2 in CO 2 are predicted by molecular simulation. An easy-touse thermodynamic model, based on those Henry's law constants, is developed to reliably describe the VLE in the CO 2 -rich region.

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Section: Experimental Datamentioning

confidence: 99%

Thermodynamic models for vapor–liquid equilibria of nitrogen+oxygen+carbon dioxide at low temperatures

Vrabec¹,

Kedia²,

Buchhauser³

et al. 2009

Cryogenics

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“…A detailed description of the setup can be found in Baba− Ahmed et al 2 and Houssin−Agbomson et al 4 2.3. Calibrations and Uncertainty Estimation.…”

Section: Apparatus Descriptionmentioning

confidence: 99%

“…Since 1990s, the Centre of Thermodynamics of Processes has been involved in the study of the thermodynamic behavior (experimental measurements and thermodynamic calculations) of such mixtures. As examples of results obtained, we can mention the study of phase equilibria of several binary systems, O 2 –N 2 , O 2 –Ar, and Ar–N 2 (VLE, Baba-Ahmed et al., O 2 –CO 2 , O 2 –N 2 O (solid solubility in liquid oxygen, De Stefani et al), O 2 –propane (VLLE, Houssin–Agbomson et al), and N 2 –propane (VLLE, Houssin–Agbomson et al). NO, CO, and Ar are also impurities present with CO 2 after the process of CO 2 capture.…”

Section: Introductionmentioning

confidence: 99%

Phase Equilibrium of Three Binary Mixtures Containing NO and Components Present in Ambient Air

et al. 2018

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Air contains impurities, which must be removed before its transformation and utilization. In the present work, new isothermal Vapor-Liquid Equilibrium (VLE) data are reported for three binary systems containing NO with (CO, N 2 or Ar) at different temperatures (between 105 and 146 K) and pressures up to 4 MPa. The compositions of the coexisting phases were experimentally determined using an apparatus based on the "static-analytic" method. The Peng-Robinson Equation of State combined with different mixing rules (classical, Wong-Sandler and Huron-Vidal) were used to represent the phase diagram (P, x, y).

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“…The SLE, SVE and VLE regions delimit the SLVE triangular region, where the composition of each phase is defined by the vertices of the triangle: in the studied case, solid phase is pure CO 2 , vapor phase is the vertex with higher N 2 concentration and the liquid phase is the vertex with higher CH 4 concentration. 20 and solubility data 17,21 . Recently the apparatus has been used for determining solid formation conditions 22 .…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Influence of Nitrogen and Oxygen on the Solubility of Solid Carbon Dioxide in Liquid and Vapor Methane at Low Temperature

Stringari

Riva

2018

Ind. Eng. Chem. Res.

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Undesired solid CO 2 formation is a main issue for the liquefied natural gas (LNG) industry and, more recently, for the bioLNG production. The abundance of CO 2 solubility data in liquid methane may not be sufficient to fully understand the problem when important amount of air gases (O 2 and N 2) are present in the natural gas or biomethane. Scarcity and incompleteness of available solubility data involving nitrogen and oxygen motivated the production of original solid-liquid-vapor equilibrium (SLVE) data for the N 2-CH 4-CO 2 and N 2-O 2-CH 4-CO 2 systems. The solubility limit of CO 2 in both liquid and vapor phases is measured in this work in order to allow the definition of solid formation conditions. A static analytic methodology is used for obtaining (p,T,x,y) data at SLVE in the temperature range from 125 to 146 K. Experimental results obtained in this work show that the addition of nitrogen and oxygen in methane decreases the solubility of CO 2 in the liquid phase, which is not in agreement with the qualitative behavior shown by literature data. A thermodynamic model for the calculation of solid-liquid-vapor equilibrium of the N 2-O 2-CH 4-CO 2 system is also presented in this work and compared with experimental data, providing good agreement.

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New equipment using a static analytic method for the study of vapour–liquid equilibria at temperatures down to 77 K

Cited by 28 publications

References 22 publications

Thermodynamic models for vapor–liquid equilibria of nitrogen+oxygen+carbon dioxide at low temperatures

Thermodynamic models for vapor–liquid equilibria of nitrogen+oxygen+carbon dioxide at low temperatures

Phase Equilibrium of Three Binary Mixtures Containing NO and Components Present in Ambient Air

Experimental Study of the Influence of Nitrogen and Oxygen on the Solubility of Solid Carbon Dioxide in Liquid and Vapor Methane at Low Temperature

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