Ultra-rapid uptake and the highly stable storage of methane as combustible ice

Bhattacharjee, Gaurav; Goh, Marcus N.; Arumuganainar, Sonia E. K.; Zhang, Ye; Linga, Praveen

doi:10.1039/d0ee02315a

Cited by 145 publications

(124 citation statements)

References 34 publications

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“…In histidine, no furth experiments were carried out as sufficient historical data was not available. In our previous work, we compared the different amino acids at a concentration 3000 ppm to form CH4 hydrate using a rocking cell [41]. In that study, we found a to pressure drop of 5.5 bar (fresh) and 4.3 bar (memory) during isothermal cooling at P = 1 bar, T = 1 °C.…”

Section: Induction Timementioning

confidence: 95%

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Chemically Influenced Self-Preservation Kinetics of CH4 Hydrates below the Sub-Zero Temperature

2021

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The self-preservation property of CH4 hydrates is beneficial for the transportation and storage of natural gas in the form of gas hydrates. Few studies have been conducted on the effects of chemicals (kinetic and thermodynamic promoters) on the self-preservation properties of CH4 hydrates, and most of the available literature is limited to pure water. The novelty of this work is that we have studied and compared the kinetics of CH4 hydrate formation in the presence of amino acids (hydrophobic and hydrophilic) when the temperature dropped below 0 °C. Furthermore, we also investigated the self-preservation of CH4 hydrate in the presence of amino acids. The main results are: (1) At T < 0 ℃, the formation kinetics and the total gas uptake improved in the presence of histidine (hydrophilic) at concentrations greater than 3000 ppm, but no significant change was observed for methionine (hydrophobic), confirming the improvement in the formation kinetics (for hydrophilic amino acids) due to increased subcooling; (2) At T = −2 °C, the presence of amino acids improved the metastability of CH4 hydrate. Increasing the concentration from 3000 to 20,000 ppm enhanced the metastability of CH4 hydrate; (3) Metastability was stronger in the presence of methionine compared to histidine; (4) This study provides experimental evidence for the use of amino acids as CH4 hydrate stabilizers for the storage and transportation of natural gas due to faster formation kinetics, no foam during dissociation, and stronger self-preservation.

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Section: Induction Timementioning

confidence: 95%

“…Recently, studies have been performed to rapidly form CH 4 hydrate under moderate pressure and temperature conditions using a thermodynamic and kinetic promoter mixture [41]. However, the effect of these chemicals on the self-preservation tendency has not been well investigated.…”

Section: Introductionmentioning

confidence: 99%

Chemically Influenced Self-Preservation Kinetics of CH4 Hydrates below the Sub-Zero Temperature

2021

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“… 24 High storage capacity and slow liberation of gas upon dissociation enable efficient and safe storage of fuel gas based on clathrates. 24 , 25 Nevertheless, clathrates are a major safety hazard in the oil and gas industry. Residual water present in crude oil or natural gas tends to form clathrate particles which then accumulate at the pipe surfaces and plug the flow.…”

Section: Introductionmentioning

confidence: 99%

Clathrate Adhesion Induced by Quasi-Liquid Layer

et al. 2021

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The adhesive force of clathrates to surfaces is a century-old problem of pipeline blockage for the energy industry. Here, we provide new physical insight into the origin of this force by accounting for the existence of a quasi-liquid layer (QLL) on clathrate surfaces. To gain this insight, we measure the adhesive force between a tetrahydrofuran clathrate and a solid sphere. We detect a strong adhesion, which originates from a capillary bridge that is formed from a nanometer-thick QLL on the clathrate surface. The curvature of this capillary bridge is nanoscaled, causes a large negative Laplace pressure, and leads to a strong capillary attraction. The microscopic capillary bridge expands and consolidates over time. This dynamic behavior explains the time-dependent increase of measured capillary forces. The adhesive force decreases greatly upon increasing the roughness and the hydrophobicity of the sphere, which founds the fundamental basics for reducing clathrate adhesion by using surface coating.

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“…Before these applications, CO 2 hydrate storage and its safe and efficient transportation are crucial steps. In order to solve this problem, plant-scale demonstration studies on hydrates are underway [21] and innovative technology (that is, the application of the self-preservation effect of hydrates) has been proposed. The so-called hydrate self-preservation effect is a phenomenon in which gas hydrates can maintain stability even at atmospheric pressure in some non-equilibrium temperature regions below the freezing point [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Promoted Disappearance of CO2 Hydrate Self-Preservation Effect by Surfactant SDS

Chen

Zhang

et al. 2021

Energies

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The capture, storage and utilization of CO2 through hydrate-related technology is a promising approach to addressing the global warming issue. Dissociation is required after the transportation of CO2 gas in the form of a self-preserving hydrate. In order to investigate the dissociation behaviors as the self-preservation effect is removed, CO2 hydrates were frozen, and then the self-preservation effect was removed through uniform heating. An evident dependence of hydrate dissociation duration on the initial dissociation rates after losing the preservation effect was observed. The results in the silica gel powder and sodium dodecyl sulphate solution showed significant reductions in the initial dissociation temperatures and a slight decrease in the initial dissociation rates when compared with those of pure water. The reductions in the former were 2.88, 2.89, and 5.73 °C in silica gel, sodium dodecyl sulphate, and a combination of the two, respectively, while the reductions in the latter were 0.12, 0.12, and 0.16 mmol/min, respectively. As the results are inconsistent with the conventional mechanism elucidating a self-preservation effect, the ice shell theory was hence further supplemented by introducing innovative contribution factors—nonenclathrated liquid water and gas molecules dissolved inside. These findings are expected to provide references for CO2 gas transportation and usage of the self-preservation effect.

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Ultra-rapid uptake and the highly stable storage of methane as combustible ice

Abstract: The emergence of natural gas as a key player in the current energy landscape tenders a rare opportunity for the development of new, robust gas storage technologies. Gas hydrate or...

Cited by 145 publications

References 34 publications

Chemically Influenced Self-Preservation Kinetics of CH4 Hydrates below the Sub-Zero Temperature

Chemically Influenced Self-Preservation Kinetics of CH4 Hydrates below the Sub-Zero Temperature

Clathrate Adhesion Induced by Quasi-Liquid Layer

Promoted Disappearance of CO2 Hydrate Self-Preservation Effect by Surfactant SDS

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