Impact of pressure on the dynamic behavior of CO2 hydrate slurry in a stirred tank reactor applied to cold thermal energy storage

Dufour, Thomas; Hoang, Hong-Minh; Oignet, Jérémy; Osswald, Véronique; Clain, Pascal; Fournaison, Laurence; Delahaye, Anthony

doi:10.1016/j.apenergy.2017.07.098

Cited by 67 publications

(24 citation statements)

References 47 publications

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“…The first formation induction time was 138 min, and the times for three re-formations were 76, 72, and 64.5 min. The induction time computing method can be seen in ref (44). The induction time of first formation was much longer than those of the three re-formations, which is a normal phenomenon of the memory effect.…”

Section: Results and Discussionmentioning

confidence: 99%

Gas–Liquid–Solid Migration Characteristics of Gas Hydrate Sediments in Depressurization Combined with Thermal Stimulation Dissociation

et al. 2019

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The exploitation of natural gas hydrate is always hindered by the migration of water and sands due to gas production. Depressurization combined with thermal stimulation is an effective method for hydrate dissociation. This paper reported the influence of gas–liquid–solid migration on morphological change of hydrate sediments in natural gas production using visualization method. Different backpressures combined with thermal stimulation methods were applied to simulate natural gas hydrate exploitation. Pressure compensation was first employed to study sediment recovery features. The expansion rate of a porous medium layer under combined dissociation and different backpressure (4.5, 3.5, 2.5, 1.5, and 0.1 MPa) was discussed. A 176% hydrate sediment expansion rate was found after the combined dissociation at 0.1 MPa. In addition, it was observed that the height of the water layer above the porous media after pressure compensation was gradually reduced with a decrease in backpressure and eventually disappeared at 0.1 MPa. It was also found that the disappearing water layer caused an anomalous memory effect phenomenon. Expansion and subsidence of sediments provide a better reference for hydrate exploitation and geological safety.

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Section: Results and Discussionmentioning

confidence: 99%

Gas–Liquid–Solid Migration Characteristics of Gas Hydrate Sediments in Depressurization Combined with Thermal Stimulation Dissociation

et al. 2019

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“…Their rheology [12,13], thermal properties [14,15], and phase-change kinetics [11,16,17] have been studied extensively. Apart from these characterization studies, performance analyses of secondary refrigeration systems using hydrate slurries are still scarce [18][19][20][21]. They may invoke various features as efficiency…”

Section: Mmentioning

confidence: 99%

Energy analysis of two-phase secondary refrigeration in steady-state operation, part 1: Global optimization and leading parameter

Pons

Hoang²,

Dufour

et al. 2018

Energy

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A great deal of attention is paid to secondary refrigeration as a means of reducing excessively high emissions of refrigerants (most of which have a potent greenhouse effect) due to leaks in large cooling units. Among the environmentally friendly fluids that can be used in secondary circuits for transporting and storing cold, hydrate slurries offer the advantage of significant latent heats of fusion associated with good fluidity. Research programs have focused attention on hydrate systems, including CO 2 , TBPB (tetra-n-butyl-phosphonium-bromide), and mixed CO 2-TBPB hydrates. In addition to feasibility concerns, energy efficiency is also a crucial concern requiring an objective analysis of the improvements likely to result from these new materials. An impartial framework was thus constructed based on the principles of optimization methods. This approach was applied to these three hydrate slurries as well as to the well-known ice slurry for comparison purposes. A numerical model of secondary

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“…Natural gas hydrate (also known as combustible ice) is considered a potential clean energy. Therefore, the energy resource of natural gas hydrate was a major direction for gas hydrate research. − In addition, the formation and accumulation of gas hydrate can plug gas and oil pipelines, which stimulate lots of relative studies on gas hydrate formation, accumulation, deposition, and gas hydrate inhibitors for gas hydrate plug prevention. − The third direction is the hydrate-based method, which can be used for gas storage, − gas mixture separation, − gas storage and transportation, , cold energy storage, , desalination, , CO 2 capture and sequestration, , and so on.…”

Section: Introductionmentioning

confidence: 99%

Hydrate-Based Method to Remove Cr(III) and Ni(II) in Chromium Hydroxide Sulfate and Nickel Sulfate Hexahydrate Solutions

Yang

Kang

et al. 2021

J. Chem. Eng. Data

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The hydrate-based method provides a potential method to remove heavy metal ions. In this work, the phase equilibrium conditions of methane hydrate in chromium hydroxide sulfate solutions and nickel sulfate hexahydrate solutions were first measured. The results suggested that the addition of both chromium hydroxide sulfate and nickel sulfate hexahydrate inhibited methane hydrate formation and acted as thermodynamic inhibitors. In addition, the removal efficiencies of both chromium hydroxide sulfate and nickel sulfate hexahydrate were also measured by forming methane hydrate at different hydration time. The results suggested that the chromium hydroxide sulfate removal efficiency reached 82.1% with a 23.7% yield of melting water at 274.2 K with a hydration time of 1 h, while nickel sulfate hexahydrate removal efficiency reached 67.5% with 68% yield of melting water at 274.2 K.

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Impact of pressure on the dynamic behavior of CO2 hydrate slurry in a stirred tank reactor applied to cold thermal energy storage

Cited by 67 publications

References 47 publications

Gas–Liquid–Solid Migration Characteristics of Gas Hydrate Sediments in Depressurization Combined with Thermal Stimulation Dissociation

Gas–Liquid–Solid Migration Characteristics of Gas Hydrate Sediments in Depressurization Combined with Thermal Stimulation Dissociation

Energy analysis of two-phase secondary refrigeration in steady-state operation, part 1: Global optimization and leading parameter

Hydrate-Based Method to Remove Cr(III) and Ni(II) in Chromium Hydroxide Sulfate and Nickel Sulfate Hexahydrate Solutions

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