Major factors influencing the generation of natural gas hydrate in porous media

Хлебников, В. Н.; Антонов, С. В.; Мишин, А. С.; Meng, Liang; Хамидуллина, И. В.; Зобов, П. М.; Лихачева, Н. В.; Гущин, П. А.

doi:10.1016/j.ngib.2017.09.006

Cited by 11 publications

(5 citation statements)

References 13 publications

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“…TBAB alleviates the hydrate formation conditions and accelerates hydrate formation, ,, which may explain why it exhibits the best promoting effect. TBAB is followed by SDS, the promoting effect of which involves reducing the surface tension, increasing hydrate solubility, and accelerating the rate of hydrate formation, consequently promoting the formation of hydrates. , Nanographite shows the poorest effect, providing a large specific surface area for the hydration reaction, enhancing heat and mass transfer, and channeling the heat generated by the reaction out of the reaction system to accelerate hydrate formation . In the subsequent 5 min, the formation rate of TBAB was the highest, whereas that of nanographite was the lowest.…”

Section: Resultsmentioning

confidence: 99%

“…50,51 Nanographite shows the poorest effect, providing a large specific surface area for the hydration reaction, enhancing heat and mass transfer, and channeling the heat generated by the reaction out of the reaction system to accelerate hydrate formation. 52 In the subsequent 5 min, the formation rate of TBAB was the highest, whereas that of nanographite was the lowest. Except for nanographite, other single-accelerator systems improve the hydrate formation rate.…”

Section: ■ Introductionmentioning

confidence: 97%

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Effects of the Presence of Promoters Sodium Dodecyl Sulfate, Nanographite, and Tetra-n-butylammonium Bromide on the Formation of CO₂ Hydrates

et al. 2022

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Carbon dioxide hydrates have attracted considerable attention because of their high gas storage capacity and low-cost carbon capture, but their low formation rate limits their application. Currently, the formation rate of hydrates is mainly improved via physical and chemical methods. Chemical methods promote hydrate formation through the addition of accelerators, which entail low cost and energy. To improve the formation rate of CO2 hydrates, 0.244 g/L sodium dodecyl sulfate (SDS), 0.288 g/L tetra-n-butylammonium bromide (TBAB), and 0.33 g/L nanographite were used, and the effects of different accelerator systems on CO2 hydrate formation were observed. The results show that the single and combined use of promoters SDS, TBAB, and nanographite can shorten the induced CO2 hydrate nucleation time. The combinations of nanographite–TBAB and SDS–TBAB shortened the induced nucleation time better than the single SDS, TBAB, and nanographite systems, while the single SDS and nanographite systems showed better promoting effect compared to the SDS–nanographite system. Thus, the combined accelerators do not necessarily promote the formation of hydrates. Among all accelerator systems, SDS–TBAB showed the shortest induced nucleation time, followed by the other three combinations. Among the single acceleration systems, TBAB showed the largest formation amount, formation rate, and conversion rate in the first 35 min from inflation stoppage. Meanwhile, among the compound systems, SDS–TBAB exhibited the best promoting effect. A comparison of all experiments shows that the accelerator significantly affects the formation amount, conversion, and formation rate of hydrates 35 min before the start of inflation; furthermore, a different effect is observed in the subsequent period. The total production, conversion, and saturation of CO2 hydrates in different accelerator systems show a minimal difference. By providing reference for the rapid formation of CO2 hydrates in a short time, this study promotes the industrial application of hydrate technology.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 97%

Effects of the Presence of Promoters Sodium Dodecyl Sulfate, Nanographite, and Tetra-n-butylammonium Bromide on the Formation of CO₂ Hydrates

et al. 2022

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“…For instance, Takeya et al [26] and Chen et al [27] observed that freeze-thaw cycles considerably reduce the hydrate formation induction period. Hyodo et al [28] and Khlebnikov et al [29] employed meltwater from ice as the water source in energy layers, significantly enhancing the rate of natural gas hydrate formation. This study adopts similar methodologies, employing controlled temperature and valve adjustments to generate meltwater from ice and manage the direction of methane gas flow, thereby facilitating rapid and stable hydrate synthesis.…”

Section: Specimen Preparationmentioning

confidence: 99%

Mechanical Characteristics of Gas Hydrate-Bearing Sediments: An Experimental Study from the South China Sea

Yuan,

Kong,

Liang

et al. 2024

JMSE

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Clarifying the mechanical characteristics of gas hydrate-bearing sediments (GHBS) from a mechanical perspective is crucial for ensuring the long-term, safe, and efficient extraction of natural gas hydrates. In this study, seabed soft clay from the northern South China Sea was utilized to prepare clayey silt samples, aligning with gradation curves related to hydrate extraction projects in the Shenhu area of the South China Sea. Utilizing the high-pressure low-temperature hydrate triaxial testing system (ETAS), twelve sets of triaxial shear tests were conducted. The results highlight that increases in hydrate saturation and confining pressure significantly enhance GHBS’ strength and stiffness, with more pronounced volume expansion observed during shearing. These tests have elucidated the mechanical responses of GHBS. Subsequently, empirical formulas were developed to characterize their properties under varying conditions. Additionally, based on the experimental data, the micro-mechanisms of GHBS were analyzed, suggesting that hydrates notably contribute to the filling and cementing effects in GHBS, with these effects varying with changes in hydrate saturation and confining pressure. This study contributes to a deeper understanding of the fundamental mechanical properties of GHBS.

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“…Zhang等人 [17] 研究了0°C以下二氧化碳水合物在孔隙介质中的形成过程并证实了水合物相平衡条件的孔隙效应. Khlebnikov等人 [18] [27] . 因此核磁信号能用于确定土样含水量, 目前已有大量实验验证了此方法的可行性及精度 [28] .…”

Section: 前言unclassified

A NMR-based analysis of carbon dioxide hydrate dissociation process in silt

Tian

Wei

Yan

et al. 2018

Sci. Sin.-Phys. Mech. Astron.

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Major factors influencing the generation of natural gas hydrate in porous media

Cited by 11 publications

References 13 publications

Effects of the Presence of Promoters Sodium Dodecyl Sulfate, Nanographite, and Tetra-n-butylammonium Bromide on the Formation of CO₂ Hydrates

Effects of the Presence of Promoters Sodium Dodecyl Sulfate, Nanographite, and Tetra-n-butylammonium Bromide on the Formation of CO₂ Hydrates

Mechanical Characteristics of Gas Hydrate-Bearing Sediments: An Experimental Study from the South China Sea

A NMR-based analysis of carbon dioxide hydrate dissociation process in silt

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Major factors influencing the generation of natural gas hydrate in porous media

Cited by 11 publications

References 13 publications

Effects of the Presence of Promoters Sodium Dodecyl Sulfate, Nanographite, and Tetra-n-butylammonium Bromide on the Formation of CO2 Hydrates

Effects of the Presence of Promoters Sodium Dodecyl Sulfate, Nanographite, and Tetra-n-butylammonium Bromide on the Formation of CO2 Hydrates

Mechanical Characteristics of Gas Hydrate-Bearing Sediments: An Experimental Study from the South China Sea

A NMR-based analysis of carbon dioxide hydrate dissociation process in silt

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Product

Resources

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Effects of the Presence of Promoters Sodium Dodecyl Sulfate, Nanographite, and Tetra-n-butylammonium Bromide on the Formation of CO₂ Hydrates

Effects of the Presence of Promoters Sodium Dodecyl Sulfate, Nanographite, and Tetra-n-butylammonium Bromide on the Formation of CO₂ Hydrates