Progress in use of surfactant in nearly static conditions in natural gas hydrate formation

Pan, Zhejun; Wu, Yi; Shang, Liyan; Zhou, Li; Zhang, Zhien

doi:10.1007/s11708-020-0675-2

Cited by 28 publications

(12 citation statements)

References 102 publications

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“…First, the gas dissolves in the aqueous medium until enough guest molecules are adsorbed in the liquid phase to start nucleation. Nucleation is usually very slow and is distinguished by its stochastic nature [95]. Two types of microscopic nucleation may occur (1) homogeneous nucleation or "labile cluster hypothesis" in which the crystal formation starts directly from the liquid phase and (2) heterogeneous nucleation in which the process starts on the surface of "nucleation sites" [96,97].…”

Section: Methane Storagementioning

confidence: 99%

Zeolitic ice: A route toward net zero emissions

Omran

Nesterenko

Valtchev

2022

Renewable and Sustainable Energy Reviews

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Section: Methane Storagementioning

confidence: 99%

Zeolitic ice: A route toward net zero emissions

Omran

Nesterenko

Valtchev

2022

Renewable and Sustainable Energy Reviews

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“…Although the promotion mechanism of surfactants on hydrate formation has been widely understood in recent decades, the synergistic mechanism after complexing with porous media is still not clear, and the formation characteristics of hydrates in complex systems are also different. This is especially evident in the complex systems of different types of promoters and porous media. ,,− Therefore, the exploration of more efficient, cheap, and environmentally friendly new hydrate promoters and the synergistic mechanism in the complex system will be the focus of the future rapid hydrate formation technology. At the same time, the combination of accelerators and porous media should not be limited to the solution.…”

Section: Challenges and Perspectives For The Futurementioning

confidence: 99%

Influence of the Particle Size of Porous Media on the Formation of Natural Gas Hydrate: A Review

et al. 2021

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As a new source of energy with great potential, natural gas hydrate (NGH) will play an indispensable and important strategic role in the future because of its tremendous reserves and wide application prospects in industry. It is of great significance to study the factors affecting the formation and occurrence of NGH for its exploration and exploitation under natural conditions and its application in industry. Since the sediments where NGH are mostly found are in porous media, the impact of porous media on the formation and occurrence of NGH has always been a research focus. This review focuses on the effects of the particle size of porous media on hydrate nucleation, growth, the conversion of water to hydrate, and phase equilibrium by summarizing previous studies. And occurrence characteristics of hydrates in porous media and the application of hydrate-based technologies are reviewed. A thorough analysis of the existing literature suggests that there is no consistent conclusion on the influence of the particle size and surface characteristics of porous media on hydrate formation. There is some debate, and the existence of a critical size of porous media needs further exploration. In addition, the interaction mechanism between the complex pore structure of porous media and the joint effects of particle size and initial water saturation on the hydrate formation process is still not clear. Thus, the influence of different initial water saturation conditions and pore structures on the formation and occurrence of NGH under different particle size conditions should be studied in the future to provide a reference for understanding the mineralization mechanism of NGH under natural conditions. Finally, some suggestions are put forward for studies of gas hydrate formation.

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“…In the first step, a crystalline phase appears gradually directly from the liquid state (homogeneous nucleation) or occurs at nucleation sites of foreign particles or surfaces (heterogeneous nucleation) 9 . This step is usually slow, distinguished by its stochastic nature 10 . After adsorption of guest molecules in the liquid phase, it is enclathrated within the hydrate precursors, and nucleation then can be detected from the simultaneous rapid pressure decrease and temperature increase due to the exothermic reaction.…”

Section: Introductionmentioning

confidence: 99%

Revealing Zeolites Active Sites Role as Kinetic Hydrate Promoters: Combined Computational and Experimental Study

Omran

Nesterenko

Valtchev

2022

ACS Sustainable Chem. Eng.

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Clathrate hydrates are emerging as a novel storage medium for safe and compact methane storage. However, their industrial-scale applicability is hindered by relatively lower gas uptake and sluggish formation kinetics. In this study, we have employed zeolites with acidic (H-Y, FAU-type) and basic (Na-X, FAU-type) surface properties as kinetic hydrate promoters (KHPs). The impact of physical parameters as pressure and the gas-to-liquid ratio has also been studied. In a combined experimental and computational study, we assessed the performance of the two types of zeolites in different concentrations and pressures for binary CH 4 -THF clathrate hydrate synthesis in 1 a non-stirred configuration. The kinetic study results showed that the acidic zeolite (H-Y) exhibited superior performance over the basic one (Na-X), reaching its optimum at 0.5 wt% zeolite, which agreed well with the DFT calculations. The methane conversion reached 94.25% at this concentration and a relatively mild pressure (6 MP). The induction time and t 90 (time to reach 90% of final gas uptake) were reduced by 35% and 31%, respectively. Our results open the door for a better understanding of the role of acidic zeolites as possible environmental benign KHPs that can help the utilization of water as a medium for green energy storage and transportation.

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Progress in use of surfactant in nearly static conditions in natural gas hydrate formation

Cited by 28 publications

References 102 publications

Zeolitic ice: A route toward net zero emissions

Zeolitic ice: A route toward net zero emissions

Influence of the Particle Size of Porous Media on the Formation of Natural Gas Hydrate: A Review

Revealing Zeolites Active Sites Role as Kinetic Hydrate Promoters: Combined Computational and Experimental Study

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