Effect of gas hydrate formation and dissociation on porous media structure with clay particles

Feng, Yujun; Qu, Aoxing; Han, Yuze; Shi, Changrui; Liu, Yanzhen; Zhang, Lunxiang; Zhao, Jiafei; Yang, Lei; Song, Yongchen

doi:10.1016/j.apenergy.2023.121694

Cited by 15 publications

(1 citation statement)

References 48 publications

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“…As a non-invasive technology, it can quantitatively analyze the evolution characteristics of pore structure, material content, and material spatial distribution during the hydrate formation in sediments. TD-NMR technology has been widely applied in hydrate research [22,23]. Ge et al [24] observed changes in transverse relaxation time (T 2 ) distribution during the methane hydrate formation in four sandstones with different pore size distributions.…”

Section: Introductionmentioning

confidence: 99%

Pore Water Conversion Characteristics during Methane Hydrate Formation: Insights from Low-Field Nuclear Magnetic Resonance (NMR) Measurements

Wang,

Ji,

Liu

et al. 2024

JMSE

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Understanding the conversion characteristics of pore water is crucial for investigating the mechanism of hydrate accumulation; however, research in this area remains limited. This study conducted methane hydrate formation experiments in unconsolidated sands using an in-house low-field nuclear magnetic resonance (NMR) system. It focused on pore water conversion characteristics and influencing factors such as initial water saturation and sand particle sizes. Results show that methane hydrate formation enhances the homogeneity of the effective pore structure within sand samples. The conversion rate of pore water is significantly influenced by differences in heat and mass transfer capacity, decreasing as initial water saturation and sand size increase. Pore water cannot be fully converted into hydrates in unconsolidated sands. The final conversion ratio of pore water in water-poor sand samples nears 97%, while in water-rich sand samples, it is only 65.80%. Sand particle size variation has a negligible impact on the final conversion ratio of pore water, with ratios exceeding 94% across different particle sizes, differing by less than 3%.

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Section: Introductionmentioning

confidence: 99%

Pore Water Conversion Characteristics during Methane Hydrate Formation: Insights from Low-Field Nuclear Magnetic Resonance (NMR) Measurements

Wang,

Ji,

Liu

et al. 2024

JMSE

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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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Mechanistic insights into pore water conversion to gas hydrates in clay minerals

Liu,

Ning,

Wang

et al. 2024

Chemical Engineering Journal

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Effect of gas hydrate formation and dissociation on porous media structure with clay particles

Cited by 15 publications

References 48 publications

Pore Water Conversion Characteristics during Methane Hydrate Formation: Insights from Low-Field Nuclear Magnetic Resonance (NMR) Measurements

Pore Water Conversion Characteristics during Methane Hydrate Formation: Insights from Low-Field Nuclear Magnetic Resonance (NMR) Measurements

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

Mechanistic insights into pore water conversion to gas hydrates in clay minerals

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