Methane Hydrate Formation and Dissociation in the Presence of Silica Sand and Bentonite Clay

Saw, Vikash Kumar; Udayabhanu, G.; Mandal, Ajay; Laik, Sukumar

doi:10.2516/ogst/2013200

Cited by 33 publications

(20 citation statements)

References 20 publications

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“…The bottleneck of this potential technology, however, is the slow kinetics of MH formation at bulk conditions, lowering its competitiveness against other technologies dramatically. Fortunately, MH formation was found to be promoted in confined spaces of porous materials, such as silica, − clays, , metal-organic frameworks, or activated carbons. − Among them, activated carbons with high internal surface area are the most promising materials for this particular application since they have proven to enhance the formation kinetics of MH from days to minutes . Although methane storage via physisorption can enhance storage capacity compared to compression at moderate pressure, the amount of methane stored in prehumidified carbons surpasses the amount stored in the corresponding dry materials considerably. , …”

Section: Introductionmentioning

confidence: 99%

Experimental Evidence of Confined Methane Hydrate in Hydrophilic and Hydrophobic Model Carbons

et al. 2019

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Methane hydrate confined in porous materials is postulated as an alternative energy storage strategy. By applying model carbons with ordered and uniformly sized pores and a combination of advanced in situ characterization techniques, we address fundamental questions on the formation mechanism of methane hydrate in confinement. Here, we provide experimental evidence for the presence of methane hydrate inside confined spaces by in situ small- and wide-angle neutron scattering, X-ray diffraction, and high-pressure gas adsorption techniques. Furthermore, we demonstrate how the carbon surface chemistry tremendously impacts the methane hydrate formation kinetics and storage capacity. Our findings represent a substantial step toward transforming a naturally occurring phenomenon into a feasible energy storage technology.

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Section: Introductionmentioning

confidence: 99%

Experimental Evidence of Confined Methane Hydrate in Hydrophilic and Hydrophobic Model Carbons

et al. 2019

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“…Figure b depicts a 1.92% deviation for the developed model from the actual data points, whereas it is 5.46% for the existing model. This is because the rigorous model takes into account most of the practical issues related to the hydrate growth in marine sediment …”

Section: Resultsmentioning

confidence: 99%

“…This is because the rigorous model takes into account most of the practical issues related to the hydrate growth in marine sediment. 49 3.1.2. Hydrate Formation in Seawater.…”

Section: Resultsmentioning

confidence: 99%

Naturally Occurring Hydrate Formation and Dissociation in Marine Sediment: Experimental Validation

Palodkar

Jana

2021

Ind. Eng. Chem. Res.

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Fundamental understanding of gas hydrate as a natural storehouse of carbon and a potential energy resource found in permafrost layers and marine sediments is crucial in extracting hydrocarbon fuel from hydrate reservoirs. With this, a theoretical framework is grounded involving the complicated physics of naturally occurring hydrate formation and dissociation with pure and mixed guest gases in the unconsolidated silica sand and seawater. The proposed formulation addresses various practical concerns, including the collective influence of pure water, salt ion, and porous medium; surface renewal at the interface between bulk guest and aqueous phase; pore irregularity in heterogeneous porous materials; hydrate growth and decay in those nanometer-sized pores along with interstitial spaces; and influence of surface tension, among others. To show its versatility, the dynamic model framework is tested under various experimental conditions that mimic the actual field conditions in terms of the type of guest gases (i.e., methane, and pure and mixed carbon dioxide); the concentration of salt ions in the liquid phase; the size, shape, and amount of porous silica sand; and the operating temperature and pressure. Under every aforementioned condition, the proposed model outperforms the existing models, which is quantified in terms of the percentage of average absolute relative deviation (AARD). For gas hydrate formation cases, the proposed model keeps AARD in the range of 1.23−9.57%, which is 5.46−19.58% for the existing models. On the other hand, for gas hydrate decomposition, the AARD of the proposed formulation varies from 2.73 to 9.78%, which is reasonably high (11.89−22.26%) for the existing model.

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“…It was suggested that the confined spaces of porous materials promote methane hydration formation. Activated carbons, − silica, − clay, , and metal–organic frameworks (MOFs) are used as potential porous materials, which are used in hydration technology. Activated carbons, possessing a high internal surface area in favor of enhancement of hydration formation, are considered as the most favorable materials for the respective application as they can reduce the methane hydration process from days to minutes …”

Section: Resultsmentioning

confidence: 99%

Assessment of Hydrate Formation, Storage Capacity, and Transport Properties of Methane and Carbon Dioxide through Functionalized Carbon Nanotube Membranes

Shahbabaei

Kim

2021

J. Phys. Chem. C

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The present work investigates the gas hydrates, storage, and transport properties of methane (CH4) and carbon dioxide (CO2) across carbon nanotubes (CNTs) designed by CONH2 (aquaporin, AQP selective filter), H2O2, and COOH functional groups via molecular dynamics (MD) simulations. Two separate systems of water–CH4 and water–CO2 at different mole fractions have been considered. The main goal is to discuss, for the first time, the gas hydrate formation mechanism in the membrane technology framework as a promising approach to mitigate the drawbacks in traditional hydrate technologies. Our model membranes offer very high CH4 storage capacity concerning available experiments. The hydrate cages decrease since the mole fraction increases (or water loading decreases), suggesting a significant contribution of water hydrogen-bonded in the hydrate formation process. The CNT-CONH2 and CNT-H2O2 model membranes provide higher hydrate cage numbers compared to CNT-COOH, suggesting a better performance for CNT-CONH2. The CNT-CONH2 shows a higher hydrate cage in the presence of CO2, particularly at the small mole fraction, while CNT-COOH and CNT-H2O2 are good at the large mole fraction. Regardless of the gas type (CH4 or CO2), both CNT-CONH2 and CNT-H2O2 model membranes suggest better performance in gas hydrate formation. Moreover, our simulated model membranes indicate better efficiency in the formation of gas hydrates concerning available experiments. An enhancement in hydrate formation in the presence of CH4 was also found in the CNT-CONH2 and CNT-H2O2 model membranes concerning the bulk system, suggesting a better performance for CNT-CONH2. This finding could reflect the potential of the membrane-based hydrate formation over the bulk system. The transport properties of water/CH4/CO2 across the model membranes have also been discussed.

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Methane Hydrate Formation and Dissociation in the Presence of Silica Sand and Bentonite Clay

Cited by 33 publications

References 20 publications

Experimental Evidence of Confined Methane Hydrate in Hydrophilic and Hydrophobic Model Carbons

Experimental Evidence of Confined Methane Hydrate in Hydrophilic and Hydrophobic Model Carbons

Naturally Occurring Hydrate Formation and Dissociation in Marine Sediment: Experimental Validation

Assessment of Hydrate Formation, Storage Capacity, and Transport Properties of Methane and Carbon Dioxide through Functionalized Carbon Nanotube Membranes

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