Formation and occurrence characteristics of methane hydrate in the complex system of sodium dodecyl sulfate and porous media

Qin, Yue; Bao, Rong; Shang, Liyan; Zhou, Li; Meng, Lingxin; Zhu, Wenzhen; Zhu, Jian; Chen, Yong

doi:10.1080/15567036.2022.2029975

Cited by 4 publications

(3 citation statements)

References 57 publications

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“…It can be observed from Figure 4 that hydrate exists in two storage modes: one attached to the container wall and exposed in the gas phase region; the other kind of adhesion occurred in the quartz sand gap. 44 Since SDS solution with 100% saturation occupies the interstitial space in the quartz sand bed, hydrate formation is divided into two steps. First, when the hydrate is formed, the expansion of the volume causes part of the liquid phase in the gap to transfer to the gas phase region above the quartz sand bed.…”

Section: Resultsmentioning

confidence: 99%

“…The gas storage capacity of the hydrate layer is closely related to the storage mode of the quartz sand layer. It can be observed from Figure that hydrate exists in two storage modes: one attached to the container wall and exposed in the gas phase region; the other kind of adhesion occurred in the quartz sand gap . Since SDS solution with 100% saturation occupies the interstitial space in the quartz sand bed, hydrate formation is divided into two steps.…”

Section: Resultsmentioning

confidence: 99%

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Investigation on Growth Kinetics of Hydrate on the Surface of an AC-QS Porous Media Composite System in an SDS System

Yuan,

Zhang,

Shang

et al. 2024

Energy Fuels

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The anionic surfactant sodium dodecyl sulfate (SDS) used in industry is a kinetic accelerator that helps to form hydrates, but the hydrates formed are extremely unstable and cannot be well preserved and transported. Hydrates stored in porous media environments can serve as a means of transportation. In this work, SDS is combined with two porous media (quartz sand (QS) and activated carbon (AC) of different particle sizes) to form a composite system to study the effect of particle size on hydrate formation characteristics. Experimental results show that when a small particle size quartz sand layer is added to a 100% saturated sodium dodecyl sulfate solution, the hydrate gas storage capacity is 0.320 mol, while the surfactant solution without a porous medium layer is only 0.263 mol. Under the same particle size, the maximum water intake amounts of the QS layer and AC layer are 0.192 and 0.143 mol, respectively. The small size of activated carbon as a gas reservoir is not conducive to the formation and storage of hydrates. The AC layer gap composed of activated carbon with a particle size of 100 μm does not hinder the mass transfer of methane gas but only hinders the formation and storage of hydrates. The good adsorption capacity of the activated carbon layer can be used as a capture layer to capture the upward migration of unreacted liquid, which is beneficial to the storage of hydrates. In the AC-QS composite system, the AC layer is used to transfer the effect of SDS to drive hydrate growth along the wall to the upper layer. The gas storage capacity of the AC-QS composite system of different sizes is basically higher than the 172 mol/(mol of the separate QS system). And the average reaction rate is 2.65 mol/min. At the same time, under the QS-AC system, 100 mesh AC can increase the gas storage capacity by up to 21.6%. At the same time, experiments found that compared with the large-particle QS system as a hydrate generation layer, the small-particle QS system and the AC system with different particle sizes can better improve the hydrate gas storage capacity. This function of capturing migrating liquid through the AC layer can solve the problem of insufficient gas storage capacity caused by exposure of a large amount of hydrates to the gas phase environment.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Investigation on Growth Kinetics of Hydrate on the Surface of an AC-QS Porous Media Composite System in an SDS System

Yuan,

Zhang,

Shang

et al. 2024

Energy Fuels

Self Cite

View full text Add to dashboard Cite

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“…The new properties either thermodynamically change the condition of hydrate formation to new moderate pressure and temperature (thermodynamic promoter) or facilitate the process by upgrading the system properties (Kinetic promoter). Surfactants have been widely studied [19][20][21] as potential thermodynamic promoters due to their ability to modify the interfacial interactions, and researchers have shown that methane storage capacity is considerably increased in the presence of hydrophilic surfactants such as Cetyl Trimethyl Ammonium Bromide (CTAB) [22,23], Tetrahydrofuran (THF) [24][25][26] and Sodium dodecyl sulfate (SDS) [19,20,27]. The use of jacketed reactor, agitation [28], spraying [29], and bubbling [30] are popular kinetic promoters that are widely used in studies.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances to Overcome Methane Hydrate Formation Challenges Using Nanostructure Promoters: A Mini Review Towards Industrialization

Hosseini¹

2022

JASN

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Natural gas has recently drawn considerable attention due to its low emissions upon combustion. Pipeline transmission of natural gas is costly and always encounters different obstacles. Therefore, an effective industrial alternative for the storage and transmission of natural gas is needed. Hydrates, also known as solidified natural gas, have been proven to be a more feasible replacement compared to pipeline transmission, CNG, or LNG. Scientists have introduced promoters to shorten the induction time, increase the storage capacity, and improve the stability of hydrates. Nanostructure materials have demonstrated promising promotion results, suggesting a bright future and a critical step in the industrialization of this technology. Researchers have mainly used pure methane, which is the main component of natural gas, to form hydrates. In this article, the fundamentals of the selection of a nanopromoter, the hydrate formation process, and related calculations are demonstrated. Finally, recent results have been brought together to provide an overview of advances towards the use of nanostructure promoters to tune hydrates for future industrial processes.

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Synergistic effect of alcohol polyoxyethylene ether sodium sulphate and copper foam on methane hydrate formation

Wang,

Ma,

Wang

et al. 2024

Can J Chem Eng

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Natural gas is the cleanest fossil energy source and its consumption is increasing rapidly, so an efficient natural gas way of storing and transporting is urgently needed. Solidified natural gas (SNG) technology is gaining traction because of its higher safety, lower cost, and flexible storage and transportation modes. To improve the methane uptake rate in SNG technology, this work investigated the growth of methane hydrate in fatty alcohol polyoxyethylene ether sodium sulphate (AES) solution with the addition of three different pores per inch (PPI) of copper foam (CF). The results showed that the addition of AES caused the hydrate to grow upwards along the wall, and the methane uptake in the 300 ppm AES solution was increased by 623% compared to pure water. CF not only provided more nucleation sites for hydrate but also transferred the heat generated during hydration. Moreover, there was a synergistic effect between AES and CF and the solution could continuously transport upward along the continuous metal skeleton to increase the gas–liquid contact area. Thus, the formation rate and induction time of methane hydrate improve. Hydrate had the highest methane uptake in the 20 PPI CF system and the lower the pressure, the greater the ability of CF to promote hydrate formation. The methane uptake improved by 27.6% and the induction time was reduced by 59.7% compared to the pure AES system at 6 MPa. This work is aimed at advancing SNG technology (especially at low pressure) and informs the theoretical foundation.

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Formation and occurrence characteristics of methane hydrate in the complex system of sodium dodecyl sulfate and porous media

Cited by 4 publications

References 57 publications

Investigation on Growth Kinetics of Hydrate on the Surface of an AC-QS Porous Media Composite System in an SDS System

Investigation on Growth Kinetics of Hydrate on the Surface of an AC-QS Porous Media Composite System in an SDS System

Recent Advances to Overcome Methane Hydrate Formation Challenges Using Nanostructure Promoters: A Mini Review Towards Industrialization

Synergistic effect of alcohol polyoxyethylene ether sodium sulphate and copper foam on methane hydrate formation

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