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Accelerated methane storage in clathrate hydrates using surfactantstabilized suspension with graphite nanoparticles

Chinese Journal of Chemical Engineering 2020年第4期28卷 1112-1119页

作者： Liang Yang Xin Wang Daoping Liu Guomin Cui Binlin Dou Juan Wang Shuqing Hao Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering School of Energy and Power EngineeringUniversity of Shanghai for Science and TechnologyShanghai 200093China School of Environmental and Chemical Engineering Shanghai University of Electric PowerShanghai 200090China National Engineering Research Center of Coal Preparation and Purification China University of Mining&TechnologyXuzhou 221116China

In this study,enhanced kinetics of methane hydrate formation in the sodium dodecyl sulfate(SDS)solution with different concentrations of suspended graphite nanoparticles(GNPs)were investigated at 6.1-9.0 MPa and 274.15 *** GNPs with rough surfaces and excellent thermal conductivity not only provided a considerable number of microsites for hydrate nucleation but also facilitated the fast hydrate heat transfer in the suspension *** a relatively low pressure of 6.1 MPa,the suspension with 0.4 wt%of GNPs exhibited the minimum induction time of 22 min and maximum methane uptake of 126.1 cm3·***,the methane storage performances of the suspensions with higher and lower concentrations of GNPs were not *** the applied pressure,the temperature increase arising from the hydrate heat in the suspension system with the optimized concentration(0.4 wt%)of GNPs was more significant than that in the traditional SDS ***,compared with those of the system without GNPs,enhanced hydration rate and storage capacity were achieved in the suspensions with GNPs,and the storage capacities were increased by 3.9%-17.0%.The promotion effect of GNPs on gas hydrate formation at low pressure is much more obvious than that at high pressure.

关键词： methane storage clathrate hydrates formation kinetics suspension graphite nanoparticles

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Tensile properties of structural I clathrate hydrates:Role of guest-host hydrogen bonding ability

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Frontiers of physics 2021年第3期16卷 125-134页

作者： Yue Xin Qiao Shi Ke Xu Zhi-Sen Zhang Jian-Yang Wu Department of Physics Research Institute for Biomimetics and Soft MatterJiujiang Research Institute and Fujian Provincial Key Laboratory for Soft Functional Materials ResearchXiamen UniversityXiamen361005China

clathrate hydrates(CHs)are one of the most promising molecular structures in applications of gas capture and storage,and gas *** knowledge of mechanical characteristics of CHs is of crucial importance for assessing gas storage and separations at cold conditions,as well as understanding their stability and formation ***,the tensile mechanical properties of structural I CHs encapsulating a variety of guest species(CH_(4),NH_(3),H_(2)S,CH_(2)O,CH_(3)OH,and CH_(3)SH)that have different abilities to form hydrogen(H-)bonds with water molecule are explored by classical molecular dynamics(MD)*** investigated CHs are structurally stable clathrate *** mechanical properties of CHs including tensile limit and Young’s modulus are dominated by the H-bonding ability of host-guest molecules and the guest molecular *** containing small CH_(4),CH_(2)O and H_(2)S guest molecules that possess weak H-bonding ability are mechanically robust clathrate structures and mechanically destabilized via brittle failure on the(101)***,those entrapping CH3SH,CH3OH,and NH3 that have strong H-bonding ability are mechanically weak molecular structures and mechanically destabilized through ductile failure as a result of gradual global dissociation of clathrate cages.

关键词： mechanical properties clathrate hydrates hydrogen bonding

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Research progress on micro-force measurement of a hydrate particle system

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Petroleum Science 2024年第4期21卷 2169-2183页

作者： Qiang Luo Wei Li Zhi-Hui Liu Feng Wang Zhi-Chao Liu Fu-Long Ning Faculty of Engineering China University of Geosciences (Wuhan) Suzhou Laboratory

It remains a great challenge to understand the hydrates involved in phenomena in practical oil and gas systems. The adhesion forces between hydrate particles, between hydrate particles and pipe walls, and between hydrate particles and reservoir particles are essential factors that control the behaviors of clathrate hydrates in different applications. In this review, we summarize the typical micro-force measurement apparatus and methods utilized to study hydrate particle systems. In addition, the adhesion test results, the related understandings, and the applied numerical calculation models are systematically discussed.

关键词： clathrate hydrates Hydrate particle Micro-force measurements Adhesion Interactions

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