Effect of the foam of sodium dodecyl sulfate on the methane hydrate formation induction time

Guo, Yong; Pu, Wanfen; Zhao, Jinzhou; Guo, Yuan; Lian, Pian; Liu, Ying; Wang, Lili; Yu, Yang

doi:10.1016/j.ijhydene.2017.06.212

Cited by 18 publications

(5 citation statements)

References 26 publications

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“…The foam may promote the hydrate formation kinetics, as it increases the interfacial surface area and generates more nucleation sites. 369 Moreover, the foam can also reduce the gas release rate during dissociation, which is the key step in the re-gasification step of the SNG technique. 370 This problem can be eased by adding foam inhibitors.…”

Section: Natural Gas Capture Storage and Transportationmentioning

confidence: 99%

Natural gas hydrate resources and hydrate technologies: a review and analysis of the associated energy and global warming challenges

Zhang

Jian-wu

et al. 2021

Energy Environ. Sci.

190

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Section: Natural Gas Capture Storage and Transportationmentioning

confidence: 99%

Natural gas hydrate resources and hydrate technologies: a review and analysis of the associated energy and global warming challenges

Zhang

Jian-wu

et al. 2021

Energy Environ. Sci.

190

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“…Zhang et al 25 have first carried out a quantitative analysis of the SDS effect on methane hydrate formation kinetics. Guo et al 26 studied the effect of foam containing SDS on the induction time of methane hydrate formation. The experimental results showed that foam containing SDS significantly accelerated the nucleation process of methane hydrate.…”

Section: Introductionmentioning

confidence: 99%

Study on Hydrate Formation and Foam Stability in a Liquefied Natural Gas–High Expansion Foam System

Zhu,

Peng,

Xie

et al. 2023

Energy Fuels

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In the process of high expansion foam inhibiting liquefied natural gas (LNG) leakage evaporation, LNG and water in foam will generate hydrates in a normal pressure environment. In order to study the absorption effect of hydrate on LNG vapor, a hydrate formation device in an LNG−foam system was designed. The gas content experiment of hydrate was carried out to evaluate the inhibition effect of hydrate absorption on LNG evaporation, which provides a basis for improving the stability time of hydrate and reducing the escape rate of natural gas. Tetrahydrofuran (THF) will aggravate the foam drainage rupture, thereby weakening the stability of the foam. On the basis of adding a hydrate thermodynamic promoter, nanoparticles were added to enhance the stability of foam. The experimental results show that the foam half-life of 1 wt % THF and 0.5 wt % hydrophilic SiO 2 nanoparticles is the longest, which is 1.7 times higher than that without additives. The gas absorption of hydrate formed in the compound system accounts for 57.5% of LNG evaporation gas, which is more than 4 times that without additives.

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“…Methane hydrate is an ice-like compound formed by a methane molecule at the center of a cage crystal and water molecules around through van der Waals forces with a nonstoichiometric mole ratio. , Theoretically, one volume of water could store 172 volumes of methane in maximum for methane hydrate, and it could be formed under mild conditions, for example, 2 °C and 6 MPa. , Therefore, it has been regarded as a potential compound to store methane. Nevertheless, surfactants as promoters are crucial to synthesis of methane hydrate, which can reduce the surface tension of an aqueous solution and thus facilitate the diffusion of methane from a gas phase to a liquid phase and have been proved to be excellent promoters for methane hydrate formation. − Among the surfactants, sodium dodecyl sulfate (SDS) and sodium dodecyl sulfonate (AS) are better choices because of a faster formation rate and higher storage capacity. − However, during the dissociation of the hydrate, both the surfactants suffer from generation of large quantities of foam, leading to loss of surfactants and pollution in the pipeline and further affecting the recycling of the surfactants. − …”

Section: Introductionmentioning

confidence: 99%

Carboxylate Surfactants as Efficient and Renewable Promoters for Methane Hydrate Formation

Liu

Cao

et al. 2021

Energy Fuels

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Carboxylate surfactants derived from hydrolysis of a renewable triglyceride were adopted as promoters in the synthesis of methane hydrate. The paper investigated the effects of surfactant carbon chain length, different counter ions, salt concentration, and additives on the promotion. It was found that sodium laurate (SL) exhibited better performance than the other surfactants, i.e., sodium decanoate (SD), sodium myristate (SM), sodium palmitate (SP), and sodium oleate (SO). At 4 mmol/L SL, the gas-storage capacity could reach 144 (v/v, the volume of methane stored by one volume of hydrate) during an induction time as short as 17 min. The decomposition of methane hydrate with SL as a promoter could avoid surfactant loss and make its recycling feasible because there was nearly no foam produced. Though sodium chloride, alcohols, and alkane could make the SL solution more surface-active, they have no obvious or even negative effect on methane hydrate formation. The high methane-storage capacity, short reaction time, and no foam generation during hydrate decomposition make SL a promising promoter to be used in large-scale applications.

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Effect of the foam of sodium dodecyl sulfate on the methane hydrate formation induction time

Cited by 18 publications

References 26 publications

Natural gas hydrate resources and hydrate technologies: a review and analysis of the associated energy and global warming challenges

Natural gas hydrate resources and hydrate technologies: a review and analysis of the associated energy and global warming challenges

Study on Hydrate Formation and Foam Stability in a Liquefied Natural Gas–High Expansion Foam System

Carboxylate Surfactants as Efficient and Renewable Promoters for Methane Hydrate Formation

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