Effect of multi-walled carbon nanotubes on methane hydrate formation

Park, Sung-Seek; Lee, Sang-Baek; Kim, Nam‐Jin

doi:10.1016/j.jiec.2010.03.023

Cited by 131 publications

(68 citation statements)

References 9 publications

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“…It is possible that the induction time of methane hydrate is reduced under the influence of carboxylic and hydroxyl groups in the structure of graphene oxide. According to Park et al (2010), the addition of multiwalled carbon nanotube (MWCNT) can decrease the time of hydrate formation, while in this research, the addition of carbon nanotubes at all concentrations resulted in a lower induction time than pure water.…”

Section: Induction Timementioning

confidence: 71%

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Kinetic study of methane hydrate formation in the presence of carbon nanostructures

et al. 2019

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The effect of synthesized nanostructures, including graphene oxide, chemically reduced graphene oxide with sodium dodecyl sulfate (SDS), chemically reduced graphene oxide with polyvinylpyrrolidone, and multi-walled carbon nanotubes, on the kinetics of methane hydrate formation was investigated in this work. The experiments were carried out at a pressure of 4.5 MPa and a temperature of 0 °C in a batch reactor. By adding nanostructures, the induction time decreases, and the shortest induction time appeares at certain concentrations of reduced graphene oxide with SDS and graphene oxide, that is, at a concentration of 360 ppm for reduced graphene oxide with SDS and 180 ppm for graphene oxide, with a 98% decrease in induction time compared to that in pure water. Moreover, utilization of carbon nanostructures increases the amount and the rate of methane consumed during the hydrate formation process. Utilization of multi-walled carbon nanotubes with a concentration of 90 ppm showes the highest amount of methane consumption. The amount of methane consumption increases by 173% in comparison with that in pure water. The addition of carbon nanostructures does not change the storage capacity of methane hydrate in the hydrate formation process, while the percentage of water conversion to hydrate in the presence of carbon nanotubes increases considerably, the greatest value of which occurres at a 90 ppm concentration of carbon nanotubes, that is, a 253% increase in the presence of carbon nanotubes compared to that of pure water.

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Section: Induction Timementioning

confidence: 71%

“…The use of carbon nanostructures in gas hydrate formation was first reported by Park et al (2010). On adding multi-walled carbon nanotubes (MWCNTs) and comparing it with pure water, they found a 300 percent increase in the consumed gas amount and a decrease in the induction time (Park et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Kinetic study of methane hydrate formation in the presence of carbon nanostructures

et al. 2019

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“…The accuracies of the thermocouple and pressure sensors were ±0.5°C and ±0.8%FS, respectively. Considering the reactor's high-pressure operation, a check valve (18) was installed at the rear side of the tube connected to the reactor to prevent the backflow of gas. A relief valve (11) automatically allowed gas to escape if the internal pressure of the reactor exceeded 150 bars.…”

Section: Apparatusmentioning

confidence: 99%

An experimental investigation into the effects of zeolites on the formation of methane hydrates

Kim

Park

Shin

et al. 2014

Int. J. Energy Res.

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SUMMARY Methane hydrate is an ice‐like nonstoichiometric compound that forms when methane reacts with water at high pressures and low temperatures. It has a lot of practical applications such as separation processes, natural gas storage transportation, and carbon dioxide sequestration. Especially, the industrial use of hydrates requires large amounts of gas to be formed quickly into hydrates. Porous media significantly influence the rate of hydrate formation by reducing the chemical barrier, where zeolites are microporous minerals. This paper deals with natural and synthetic (5A and 13A) zeolites for hydrate formation and gas storage capacity. The results show that methane hydrates are formed much faster in the three zeolite solutions tested compared with their formation in distilled water at low subcooling temperatures (<7 K). It was also observed that the gas consumption was the greatest in the 0.01 wt.% zeolite 13X solution of distilled water. Its gas consumption was 5.1 times that of distilled water at 0.5 K subcooling. Zeolite 13X demonstrated its effectiveness in enhancing and expediting methane hydrate formation. Copyright © 2014 John Wiley & Sons, Ltd.

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“…However, most recent reports of using THF additive have only considered the phase equilibrium conditions, rather than the amount of gas consumed and the rate of hydrate formation. The addition of carbon nanotubes, which show very high gas absorption, has been shown to increase the amount of gas contained in a given amount of hydrate . Oxidized carbon nanotubes (OMWCNTs) used with THF have led to favorable phase equilibrium and high gas entrapment by the hydrate .…”

Section: Introductionmentioning

confidence: 99%

Enhancement of methane hydrate formation using a mixture of tetrahydrofuran and oxidized multi-wall carbon nanotubes

Lim

Riffat

Park

et al. 2013

Int. J. Energy Res.

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SUMMARY Methane hydrate is a kind of gas hydrate formed by physical binding between water molecules and methane gas, which is captured in the cavities of water molecules under a specific temperature and pressure. Pure methane hydrate of 1 m3 can be decomposed into methane gas of 172 m3 and water of 0.8 m3 at standard conditions. Methane hydrate has many practical applications such as separation processes, natural gas storage transportation, and carbon dioxide sequestration. For the industrial utilization of this substance, it is essential to find a rapid method of manufacturing it. This work studies the formation of methane hydrates by using tetrahydrofuran (THF) and oxidized carbon nanotubes (OMWCNTs) by testing different fluid mixtures of THF and carbon nanotubes. The results show that when the mixed fluid contained THF, the OMWCNTs showed the gas consumption 5.2 times that of distilled water at 3.4 K subcooling. Also, THF's effects as a thermodynamic phase equilibrium promoter were preserved when it was used with OMWCNTs. Therefore, it can be expected that when OMWCNTs are used with an aqueous mixture of THF, both the favorable phase equilibrium of THF and the high gas consumption of the carbon nanotubes can be obtained. Copyright © 2013 John Wiley & Sons, Ltd.

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Effect of multi-walled carbon nanotubes on methane hydrate formation

Cited by 131 publications

References 9 publications

Kinetic study of methane hydrate formation in the presence of carbon nanostructures

Kinetic study of methane hydrate formation in the presence of carbon nanostructures

An experimental investigation into the effects of zeolites on the formation of methane hydrates

Enhancement of methane hydrate formation using a mixture of tetrahydrofuran and oxidized multi-wall carbon nanotubes

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