The effect of high driving force on the methane hydrate-polyvinylpyrrolidone system

Posteraro, Dany; Verrett, Jonathan; Marić, Milan; Servio, Phillip

doi:10.1016/j.jngse.2016.06.035

Cited by 16 publications

(14 citation statements)

References 32 publications

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“…To promote the rapid formation process of methane hydrate again, pressure disturbance would be an effective way to increase the driving force of the hydration reaction. 9,18,31 As shown in Figures 6, 7, and 8, there was no pressure falling fast observed after supplementing the pressure to an initial value. Moreover, the pressure decreased rapidly with the temperature decreasing in the high-pressure vessel.…”

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confidence: 81%

“…In contrast, the conversion rate of The results agreed well with the relative conclusions presented by scholars. 12,13,31,32 Tables 2 and 3 show the comparison of formation rate and conversion rate of methane hydrate under different initial pressures. And the conversion rate of methane hydrate attained 56.5% in the experiments when the initial pressure was at 9 MPa.…”

Section: The Influence Of Initial Pressure On the Conversion Rate Of ...mentioning

confidence: 99%

“…Curves of the formation process for CH4 hydrate under the pressure disturbance conditions at an initial pressure of 9 MPa pressure decreased slowly in the experiment. 29,31 This indicated that pressure disturbance could promote the rapid formation of methane hydrate again. But the average formation rate was one order of magnitude lower than that in the first stage during the experiments.…”

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confidence: 96%

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Influence of pressure on the formation process of CH₄ hydrate in porous media below the freezing point

Zhang

et al. 2021

Env Prog and Sustain Energy

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Natural gas hydrates are mainly stored in the pores of the sedimentary layer in permafrost regions, and the formation characters in porous media were particularly important for the exploitation and utilization of natural gas hydrates. So, it is essential to understand the formation process of methane hydrate in porous media below freezing point. In this study, the formation process of methane hydrate was studied in a closed system in porous media below freezing point. The results indicated that the initial pressure played an important role in the formation characteristics of methane hydrate in porous media below freezing point. The higher the initial pressure was, the larger the formation rate of methane hydrate. And the maximum formation rate attained 6.46 × 10 −4 mol/h when the initial pressure was 9.0 MPa under the same temperature and particle size conditions. Furthermore, the final conversion rate was larger at higher initial pressure and the final conversion rate attained 56.5% at an initial pressure of 9.0 MPa. Furthermore, the pressure disturbance could improve the formation process of methane hydrate and the final conversion rate was larger to some extent. The relevant results will provide a theoretical reference for natural gas hydrates exploitation.

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confidence: 81%

Section: The Influence Of Initial Pressure On the Conversion Rate Of ...mentioning

confidence: 99%

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confidence: 96%

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Influence of pressure on the formation process of CH₄ hydrate in porous media below the freezing point

Zhang

et al. 2021

Env Prog and Sustain Energy

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“…Posteraro et al [12] found that methane concentration in the bulk liquid increases with increased PVP inhibitor loading. Another study by Posteraro et al [13] found the masking effect of PVP on hydrate growth when used in high driving force. The same group found that [13], under certain operating conditions, PVP affects hydrate growth but not nucleation.…”

Section: Introductionmentioning

confidence: 96%

“…Another study by Posteraro et al [13] found the masking effect of PVP on hydrate growth when used in high driving force. The same group found that [13], under certain operating conditions, PVP affects hydrate growth but not nucleation. Bruusgaard et al [14] showed water droplets containing PVP produced hydrate shells with varying thicknesses and a characteristic rod-like morphology.…”

Section: Introductionmentioning

confidence: 96%

A 3-In-1 Approach to Evaluate Gas Hydrate Inhibitors

2019

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With a single apparatus and very short experimentation times, we have assessed phase equilibria, apparent kinetics and morphology of methane gas hydrates in the presence of thermodynamic inhibitors ethane-1,2-diol (MEG) and sodium chloride (NaCl); and kinetic hydrate inhibitor polyvinyl-pyrrolidone (PVP). Tight, local temperature control produced highly repeatable crystal morphologies in constant temperature systems and in systems subject to fixed temperature gradients. Hydrate-Liquid-Vapor (HLV) equilibrium points were obtained with minimal temperature and pressure uncertainties (u T avg = 0.13 K and u p = 0.005 MPa). By applying a temperature gradient during hydrate formation, it was possible to study multiple subcoolings with a single experiment. Hydrate growth velocities were determined both under temperature gradients and under constant temperature growth. It was found that both NaCl and MEG act as kinetic inhibitors at the studied concentrations. Finally, insights on the mechanism of action of classical inhibitors are presented.

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Development of Spontaneous Imbibition in Tight Rocks

Zhang

2022

Chem Technol Fuels Oils

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The effect of high driving force on the methane hydrate-polyvinylpyrrolidone system

Cited by 16 publications

References 32 publications

Influence of pressure on the formation process of CH₄ hydrate in porous media below the freezing point

Influence of pressure on the formation process of CH₄ hydrate in porous media below the freezing point

A 3-In-1 Approach to Evaluate Gas Hydrate Inhibitors

Development of Spontaneous Imbibition in Tight Rocks

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The effect of high driving force on the methane hydrate-polyvinylpyrrolidone system

Cited by 16 publications

References 32 publications

Influence of pressure on the formation process of CH4 hydrate in porous media below the freezing point

Influence of pressure on the formation process of CH4 hydrate in porous media below the freezing point

A 3-In-1 Approach to Evaluate Gas Hydrate Inhibitors

Development of Spontaneous Imbibition in Tight Rocks

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Product

Resources

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Influence of pressure on the formation process of CH₄ hydrate in porous media below the freezing point

Influence of pressure on the formation process of CH₄ hydrate in porous media below the freezing point