The Experimental Determination of the P-v-T-X Relations for the Carbon Dioxide-Nitrogen and the Carbon Dioxide-Methane Systems

Arai, Yasuhiko; Kaminishi, Gen-Ichi; Saito, Shozaburo

doi:10.1252/jcej.4.113

Cited by 128 publications

(59 citation statements)

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“…Data at 288.15 and 283.15 K were used to validate the experimental procedure for the VLE study by comparison with those from Arai et al [14] and Kaminishi et al [13] (Table 3). Our data agree well with those of both research groups.…”

Section: Ch4-co2 Binary Systemmentioning

confidence: 99%

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Phase Equilibria of the CH4-CO2 Binary and the CH4-CO2-H2O Ternary Mixtures in the Presence of a CO2-Rich Liquid Phase

et al. 2017

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Abstract:The knowledge of the phase behavior of carbon dioxide (CO 2 )-rich mixtures is a key factor to understand the chemistry and migration of natural volcanic CO 2 seeps in the marine environment, as well as to develop engineering processes for CO 2 sequestration coupled to methane (CH 4 ) production from gas hydrate deposits. In both cases, it is important to gain insights into the interactions of the CO 2 -rich phase-liquid or gas-with the aqueous medium (H 2 O) in the pore space below the seafloor or in the ocean. Thus, the CH 4 -CO 2 binary and CH 4 -CO 2 -H 2 O ternary mixtures were investigated at relevant pressure and temperature conditions. The solubility of CH 4 in liquid CO 2 (vapor-liquid equilibrium) was determined in laboratory experiments and then modelled with the Soave-Redlich-Kwong equation of state (EoS) consisting of an optimized binary interaction parameter k ij(CH 4 -CO 2 ) = 1.32 × 10 −3 × T − 0.251 describing the non-ideality of the mixture. The hydrate-liquid-liquid equilibrium (HLLE) was measured in addition to the composition of the CO 2 -rich fluid phase in the presence of H 2 O. In contrast to the behavior in the presence of vapor, gas hydrates become more stable when increasing the CH 4 content, and the relative proportion of CH 4 to CO 2 decreases in the CO 2 -rich phase after gas hydrate formation.

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Section: Ch4-co2 Binary Systemmentioning

confidence: 99%

“…Arai et al [14] performed the VLE in a glass capillary cell. The pressure was then increased while keeping the temperature constant, and the resulting volume change of the mixture was measured with a cathetometer.…”

Section: Introductionmentioning

confidence: 99%

Phase Equilibria of the CH4-CO2 Binary and the CH4-CO2-H2O Ternary Mixtures in the Presence of a CO2-Rich Liquid Phase

et al. 2017

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“…critical points for a variety of compositions in a binary fluid system, is illustrated in Figure 2. The prediction of critical temperatures of fluid mixtures corresponds to experimental data [16,19], whereas calculated critical pressures are slightly overestimated at higher fraction of CH4. This example illustrates that the PReos [10] is a favourable modification that can be used to calculate sub-critical conditions of CO2-CH4 fluid mixtures.…”

Section: Critical Point and Curvementioning

confidence: 53%

“…Calculated critical points of binary CO2-CH4 fluid mixtures in terms of temperature (red line) and pressure (green line), obtained from the PReos [10]. Solid circles are experimental data [16,19]. The open squares are the critical point of pure CO2 [20].…”

Section: Critical Point and Curvementioning

confidence: 99%

“…The experimental data consist mainly of pressure, temperature, density (or molar volume) and compositional data, but can also include less parameters. Figure 3 gives an example of the misfit between the first type of experimental data for binary CO2-CH4 mixtures [19] and calculated fluid properties with Experimental data of homogeneous supercritical gas mixtures in the ternary CO2-CH4-N2 system [23] are compared with the two-constant cubic equations of state in Table 4. The Weos [7] clearly overestimates (up to 14.1 %) experimentally determined molar volumes at 100 MPa and 200 ˚C.…”

Section: Experimental Datamentioning

confidence: 99%

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Thermodynamic Properties and Applications of Modified van-der-Waals Equations of State

Bakker¹

2012

Thermodynamics - Fundamentals and Its Application in Science

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Non‐Aqueous Phase Equilibrium

Carroll¹

2010

Acid Gas Injection and Carbon Dioxide Sequestration

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The Experimental Determination of the P-v-T-X Relations for the Carbon Dioxide-Nitrogen and the Carbon Dioxide-Methane Systems

Cited by 128 publications

References 1 publication

Phase Equilibria of the CH4-CO2 Binary and the CH4-CO2-H2O Ternary Mixtures in the Presence of a CO2-Rich Liquid Phase

Phase Equilibria of the CH4-CO2 Binary and the CH4-CO2-H2O Ternary Mixtures in the Presence of a CO2-Rich Liquid Phase

Thermodynamic Properties and Applications of Modified van-der-Waals Equations of State

Non‐Aqueous Phase Equilibrium

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