Synergistic effect of combination of surfactant and oxide powder on enhancement of gas hydrates nucleation

Nesterov, A. N.; Reshetnikov, A. M.; Manakov, Andrey Yu.; Adamova, T. P.

doi:10.1016/j.jechem.2017.04.001

Cited by 32 publications

(12 citation statements)

References 52 publications

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“…In fact, as is known, the surfactant SDS utilized in this study is only one kind of dynamic additive for the hydrate formation, which does not transform the thermodynamic equilibrium conditions of hydrates [48][49][50]. This promotion action is carried out by improving water molecule activities and then by gas dissolution capabilities [51]. Hence, the freezing point of water is also not changed by SDS.…”

Section: Discussionmentioning

confidence: 96%

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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Section: Discussionmentioning

confidence: 96%

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

Chen

Zhang

et al. 2021

Energies

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“…This promotion action is carried out by improving the activities of water molecules and then dissolution capabilities of gas. 38 Hence, the freezing point of water is also not changed by SDS. Logically, the dissociation properties of hydrate with selfpreservation effect should not be in uenced by the addition of SDS.…”

Section: Discussionmentioning

confidence: 99%

Promoted disappearance of CO2 hydrate self-preservation effect by surfactant SDS

Chen

Zhang

et al. 2020

Preprint

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Capture, storage and utilization of CO2 gas through the hydrate technology is deemed as a promising approach to solve the problem on global warming. After efficient transportation of CO2 gas with the self-preservation effect of hydrate, the dissociations of hydrate are required in some practical scenarios. In order to investigate the initial dissociation properties of hydrates while the self-preservation effect was removed, CO2 hydrates were formed in different experimental conditions and media and then frozen. After that, the self-preservation effect of hydrates was slowly removed through a uniform heating method. The measurement results exhibit that comparing with the pure water (PW), the initial dissociation temperatures (IDT) are significantly lowered by the silica gel powder (SG) and sodium dodecyl sulphate (SDS) solution (SS). Similarly, the initial dissociation rates (IDR) of hydrates are also reduced. These patterns are opposite to the traditional elucidating mechanism of the self-preservation effect of hydrate. Hence, the theory of ice shell was supplemented furthermore. In addition, it is found that the final duration time of the entire dissociation process of hydrate after losing the preservation effect presents obvious dependence on the initial dissociation rate (IDR). These findings are expected to provide some references for the future transportation of CO2 gas with the self-preservation effect of hydrate.

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“…This suggested a synergistic effect between surfactant and nanofluid. Nesterov et al [36] believed that the combination of surfactant and alumina powder had a synergistic effect on hydrate nucleation. The duration of hydrate formation in the compound solution system was shorter than that in the single additive system.…”

Section: Effects Of Silica Nanoparticles and Ctab Complex System On H...mentioning

confidence: 99%

“…This hydrate structure on reactor walls resembles wet snow impregnated with thawed water. The forces of adhesion to reactor walls are not strong, and this structure collapses (washed into reactor volume) [36] . In addition, it is explained by the collapse of the capillary‐porous hydrate structure on the reactor wall due to the stirring.…”

Section: Effects Of Silica Nanoparticles and Ctab Complex System On H...mentioning

confidence: 99%

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Kinetics of Methane Hydrate Formation in the Presence of Silica Nanoparticles and Cetyltrimethylammonium Bromide

et al. 2022

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Hydrate technology promoted the development of natural gas industry. Nanoparticles showed a broad prospect for hydrate technology because of their excellent mass and heat transfer characteristics. At an experimental temperature of 275.15 K and pressure of 5 MPa, silica nanoparticles and cetyltrimethylammonium bromide (CTAB) were used to investigate the characteristics (pressure drop, gas storage capacity, and formation rate). The experimental results showed that the higher the concentration of silica nanofluid, the shorter the induction time. Among the four silica nanoparticles concentration (0.1, 0.2, 0.3, and 0.5 wt%) tested in this work, the concentration of 0.3 wt% was optimal for the enhancement of CH4 hydrate formation. In the complex system composed of silica nanoparticles and CTAB, the surface of silica nanoparticles was positively charged by hydrolysis. The cationic active groups ionized by surfactants were aggregated to the surface of the particles under the Coulomb force. Methane molecules were gathered to hydrophobic groups by non‐polar adsorption, which was more conducive to hydrate formation. Compared to silica nanofluid, the total time for hydrate formation decreased by 66.2 %.

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Synergistic effect of combination of surfactant and oxide powder on enhancement of gas hydrates nucleation

Cited by 32 publications

References 52 publications

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

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

Promoted disappearance of CO2 hydrate self-preservation effect by surfactant SDS

Kinetics of Methane Hydrate Formation in the Presence of Silica Nanoparticles and Cetyltrimethylammonium Bromide

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