Modeling the properties of methane + ethane (Propane) binary hydrates, depending on the composition of gas phase state in equilibrium with hydrate

Zhdanov, Ravil К.; Adamova, T. P.; Субботин, О. С.; Pomeranskii, A. A.; Belosludov, V. R.; Dontsov, V. R.; Nakoryakov, V. E.

doi:10.1134/s1810232810040041

Cited by 8 publications

(8 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They attribute this substancespecific modification to the particularly rapid increase of hydrate formation pressure with temperature. Zhdanov et al 78 showed that accordingly, in the case of mixed hydrates, the equilibrium pressure of hydrate formation decreases abruptly in the presence of propane in the gas phase, even for low propane concentrations. In GPA RR-50, 79 temperatures, which were too large to be justified by reasons like the internal consistency of the experimental data (SRK EoS together with vdWP theory were used).…”

Section: Resultsmentioning

confidence: 99%

Thermodynamic Modeling of Natural Gas Systems Containing Water

Karakatsani

Kontogeorgis

2013

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

As the need for dew point specifications remains very urgent in the natural gas industry, the development of accurate thermodynamic models, which will match experimental data and will allow reliable extrapolations, is needed. Accurate predictions of the gas phase water content in equilibrium with a heavy phase were previously obtained using cubic plus association (CPA) coupled with a solid phase model in the case of hydrates, for the binary systems of water–methane and water–nitrogen and a few natural gas mixtures. In this work, CPA is being validated against new experimental data, both water content and phase equilibrium data, and solid model parameters are being estimated for four natural gas main components (methane, ethane, propane, and carbon dioxide). Different tests for the solid model parameters are reported, including vapor-hydrate-equilibria (VHE) and liquid-hydrate-equilibria (LHE) calculations, structural transitions, and predictions at low temperatures. Furthermore, model predictions for representative multicomponent mixtures are presented and compared against the ISO-standard GERG-water model and other selected models. In most cases, very good agreement with experimental data is obtained.

show abstract

Section: Resultsmentioning

confidence: 99%

Thermodynamic Modeling of Natural Gas Systems Containing Water

Karakatsani

Kontogeorgis

2013

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…We conducted a calculation of P - T diagrams for gas–hydrate–ice (water) phase equilibria (described by Equations (10) and (11), carried out earlier) for one-component hydrates of methane and reproduced the experimental data with good accuracy [45,46].…”

Section: Resultsmentioning

confidence: 99%

Influence of N2 on Formation Conditions and Guest Distribution of Mixed CO2 + CH4 Gas Hydrates

et al. 2018

View full text Add to dashboard Cite

In this contribution, a method based on a solid solution theory of clathrate hydrate for multiple cage occupancy, host lattice relaxation, and guest-guest interactions is presented to estimate hydrate formation conditions of binary and ternary gas mixtures. We performed molecular modeling of the structure, guest distribution, and hydrate formation conditions for the CO2 + CH4 and CO2 + CH4 + N2 gas hydrates. In all considered systems with and without N2, at high and medium content of CO2 in the gas phase, we found that CO2 was more favorable in occupying clathrate hydrate cavities than CH4 or N2. The addition of N2 to the gas phase increased the ratio concentration of CO2 in comparison with the concentration of CH4 in clathrate hydrates and made gas replacement more effective. The mole fraction of CO2 in the CO2 + CH4 + N2 gas hydrate rapidly increased with the growth of its content in the gas phase, and the formation pressure of the CO2 + CH4 + N2 gas hydrate rose in comparison to the formation pressure of the CO2 + CH4 gas hydrate. The obtained results agreed with the known experimental data for simple CH4 and CO2 gas hydrates and the mixed CO2 + CH4 gas hydrate.

show abstract

“…Calculation of P, T-diagrams for phase equilibria gas-hydrate-ice (water) described by the Equations (10) , (11) carried out earlier for one-component hydrates of methane, and reproduced the experimental data with good accuracy [45,46]. The modeling was performed in the framework of the molecular model described above hear such calculations were conducted for carbon dioxide hydrates.…”

Section: B Phase Equilibria Gas-hydrate-ice (Water)mentioning

confidence: 96%

Influence of Nitrogen on Structure, Guest Distribution and Hydrate Formation Conditions of the Mixed CO2–CH4 and CO2–CH4–N2 Gas Hydrates

Belosludov¹,

Bozhko²,

Субботин³

et al. 2018

Preprint

View full text Add to dashboard Cite

In this contribution, a method based on a solid solution theory of clathrate hydrate for multiple cage occupancy, host lattice relaxation and guest-guest interactions has been presented to estimate hydrate formation conditions of binary and ternary gas mixtures. We have performed molecular modeling of structure, guest distribution, and hydrate formation conditions for the CO2 + CH4, and CO2 + CH4 + N2 gas hydrates. In all considered systems with and without N2, at high and medium content of CO2 in the gas phase we have found that CO2 is more favorable to occupy clathrate hydrate cavities than CH4 or N2. Addition of N2 to the gas phase increases ratio concentration CO2 in compressing with concentration CH4 in clathrate hydrates and makes gas replacement more effective. The mole fractions of CO2 in CO2 + CH4 + N2 gas hydrate rapidly increases with the growth of its content in the gas phase. And the formation pressure of CO2 + CH4 + N2 gas hydrate rises in comparison with the formation pressure of CO2 + CH4 gas hydrate. Obtained results agree with the known experimental data for simple CH4, CO2 gas hydrates and mixed CO2 + CH4 gas hydrate.

show abstract

Modeling the properties of methane + ethane (Propane) binary hydrates, depending on the composition of gas phase state in equilibrium with hydrate

Cited by 8 publications

References 21 publications

Thermodynamic Modeling of Natural Gas Systems Containing Water

Thermodynamic Modeling of Natural Gas Systems Containing Water

Influence of N2 on Formation Conditions and Guest Distribution of Mixed CO2 + CH4 Gas Hydrates

Influence of Nitrogen on Structure, Guest Distribution and Hydrate Formation Conditions of the Mixed CO<sub>2</sub>–CH<sub>4</sub> and CO<sub>2</sub>–CH<sub>4</sub>–N<sub>2</sub> Gas Hydrates

Contact Info

Product

Resources

About

Modeling the properties of methane + ethane (Propane) binary hydrates, depending on the composition of gas phase state in equilibrium with hydrate

Cited by 8 publications

References 21 publications

Thermodynamic Modeling of Natural Gas Systems Containing Water

Thermodynamic Modeling of Natural Gas Systems Containing Water

Influence of N2 on Formation Conditions and Guest Distribution of Mixed CO2 + CH4 Gas Hydrates

Influence of Nitrogen on Structure, Guest Distribution and Hydrate Formation Conditions of the Mixed CO<sub>2</sub>&ndash;CH<sub>4</sub> and CO<sub>2</sub>&ndash;CH<sub>4</sub>&ndash;N<sub>2</sub> Gas Hydrates

Contact Info

Product

Resources

About

Influence of Nitrogen on Structure, Guest Distribution and Hydrate Formation Conditions of the Mixed CO<sub>2</sub>–CH<sub>4</sub> and CO<sub>2</sub>–CH<sub>4</sub>–N<sub>2</sub> Gas Hydrates