Study on methane hydrate formation using ultrasonic waves

Park, Sung-Seek; Kim, Nam‐Jin

doi:10.1016/j.jiec.2013.02.004

Cited by 41 publications

(11 citation statements)

References 9 publications

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“…There are currently more and more studies on formation of methane hydrate in porous materials. Several approaches have been tested to increase the gas-liquid contact area, and consequently the rate of MH formation (Linga et al 2009;Mel'nikov et al 2016;Park and Kim 2013). Nanoporous materials have proven to be an excellent platform for hosting and promoting the formation of MHs in a matter of minutes (Borchardt et al 2018;Casco et al 2019).…”

Section: Vapor/gas Sorptionmentioning

confidence: 99%

Non-porous organic crystals and their interaction with guest molecules from the gas phase

et al. 2020

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Some organic molecules encapsulate solvents upon crystallization. One class of compounds that shows a high propensity to form such crystalline solvates are tetraaryladamantanes (TAAs). Recently, tetrakis(dialkoxyphenyl)-adamantanes have been shown to encapsulate a wide range of guest molecules in their crystals, and to stabilize the guest molecules against undesired reactions. The term ‘encapsulating organic crystals’ (EnOCs) has been coined for these species. In this work, we studied the behavior of three TAAs upon exposition to different guest molecules by means of sorption technique. We firstly measured the vapor adsorption/desorption isotherms with water, tetrahydrofuran and toluene, and secondly, we studied the uptake of methane on dry and wet TAAs. Uptake of methane beyond one molar equivalent was detected for wet crystals, even though the materials showed a lack of porosity. Thus far, such behavior, which we ascribe to methane hydrate formation, had been described for porous non-crystalline materials or crystals with detectable porosity, not for non-porous organic crystals. Our results show that TAA crystals have interesting properties beyond the formation of conventional solvates. Gas-containing organic crystals may find application as reservoirs for gases that are difficult to encapsulate or are slow to form crystalline hydrates in the absence of a host compound. Wet tetraaryladamantane crystals take up methane in form of methane hydrate structure I, even though they appear non-porous to argon.

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Section: Vapor/gas Sorptionmentioning

confidence: 99%

Non-porous organic crystals and their interaction with guest molecules from the gas phase

et al. 2020

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“…Park and Kim [65] investigated the effect of ultrasonic waves as a promoter for methane hydrate formation. The research aimed at increasing gas consumption during the hydrate for- The results showed that maximum gas consumption occurs when 150 W power is applied at 0.5 K, i.e., gas consumption increases four times than without ultrasonic irradiation.…”

Section: Ultrasonics-based Hydrate Dissociationmentioning

confidence: 99%

“…However, since only limited research [50,62,63,65] has been conducted using electromagnetically induced hydrate dissociation, the developments in this direction continue to lag behind. Therefore, keeping the key points, observations and conclusions from the above literature, the following points have been proposed for future studies.…”

Section: Future Directionsmentioning

confidence: 99%

Hydrate Dissociation Using Microwaves, Radio Frequency, Ultrasonic Radiation, and Plasma Techniques

Khan

Misra²,

Majumder

et al. 2020

ChemBioEng Reviews

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In this work, a comprehensive review of technologies employing radiation sources such as microwave, ultrasonic, and radio frequency (RF) on gas hydrates is presented. The characterizing parameters of radiation, such as frequency, wavelength, and power are highlighted for the compiled studies. In addition, characterizing parameters like hydrate dissociation rate, irradiated microwave power, complete dissociation time, reaction paths and mechanisms, differential pressure and temperature of gas hydrates during the experiments are also reported. Moreover, the work also describes the basic concept behind the working of the different wave forms such as microwaves, ultrasonic, RF wave and plasma for hydrate dissociation.

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“…At present, the most common methods to speed up the hydrate formation used in the laboratory are physical and chemical methods. From a macro perspective, physical methods include stirring [4], bubbling [5], atomizing [6] and external field ways [7,8], which aim to enlarge the gas and liquid-water phases contact area and enhance the heat and mass transfer during the hydrate formation process, finally speeding up the generation rate. From a microscopic point of view, according to different promotion mechanisms, the chemical methods could be divided into the thermodynamic promotion and the kinetic promotion.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide: An Effective Promoter for CO2 Hydrate Formation

et al. 2018

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The main difficulties in applying technologies based on hydrate formation are the slow hydrate formation rate, low storage capacity, severe formation conditions and environmentally devastating promoters. Nano-sized graphene oxide has special microstructure features such as its functional groups and a large specific surface area, which can lead to high heat and mass transfer efficiency, large gas dissolution, fast nucleation and formation rate. In this work, CO 2 hydrate formation with and without graphene oxide nanoparticles was investigated. Herein, the promoting mechanism and effects of graphene oxide concentrations in different initial pressures ranging from 3 to 5 MPa at 279 K on CO 2 hydrate formation process were studied experimentally. The experimental results showed that graphene oxide can shorten the induction time by 53-74.3% and increase the gas consumption up to 5.1-15.9% under different system pressures. Based on the results, the optimum concentration was ascertained as 50 ppm under which condition, the induction time and the reaction time were the shortest while the pressure drop and the gas consumption reached the maximum.

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Study on methane hydrate formation using ultrasonic waves

Cited by 41 publications

References 9 publications

Non-porous organic crystals and their interaction with guest molecules from the gas phase

Non-porous organic crystals and their interaction with guest molecules from the gas phase

Hydrate Dissociation Using Microwaves, Radio Frequency, Ultrasonic Radiation, and Plasma Techniques

Graphene Oxide: An Effective Promoter for CO2 Hydrate Formation

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