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Воротынцев, В. М.; Малышев, В. М.; Мочалов, Г. М.; Taraburov, P. G.

doi:10.1023/a:1010369220823

Cited by 28 publications

(37 citation statements)

References 1 publication

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“…In spite of the advantages of gas hydrate method for gas separation, extraction of noble gas mixtures such as Ar, Kr, and Xe using the gas hydrate method as well as investigation of the equilibrium conditions of noble gas hydrates have scarcely been studied. The gas hydrate method was applied for the separation of mixed noble gases with sulfur dioxide (SO 2 ). , The separation was performed by the static method using multiple hydrate formation/dissociation stages (up to 180) with a low output of the separated substances. In 1963, an apparatus was designed by Kinney and Kahre for the separation of helium from natural gas using the gas hydrate method.…”

Section: Introductionmentioning

confidence: 99%

“…The gas hydrate method was applied for the separation of mixed noble gases with sulfur dioxide (SO 2 ). 15,37 The separation was performed by the static method using multiple hydrate formation/dissociation stages (up to 180) with a low output of the separated substances. In 1963, an apparatus was designed by Kinney and Kahre 38 for the separation of helium from natural gas using the gas hydrate method.…”

Section: Introductionmentioning

confidence: 99%

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Application of Gas Hydrates in the Separation and Purification of Xenon from a Mixture of Xenon and Argon

2021

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In this study, the gas hydrate method is applied in the separation of expensive gas mixtures such as xenon and argon. An isochoric pressure-search method was used to measure hydrate dissociation conditions. The compositions of the gas phase in equilibrium with the hydrate and aqueous phases were measured using a gas chromatography technique. A model based on the material balance equations with Newton's numerical method was used to determine the compositions in the adjacent phases. A thermodynamic model based on the solid solution theory of van der Waals and Platteeuw, together with the Valderrama−Patel− Teja (VPT) equation of state and the Non-Density-Dependent (NDD) mixing rules were used to predict the experimental hydrate dissociation conditions. Model predictions were found to be in satisfactory agreement with the experimental data. In a single gas hydrate formation stage experimental results showed the purification of xenon from 0.2 to 0.97 mole fraction in a mixture with argon.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of Gas Hydrates in the Separation and Purification of Xenon from a Mixture of Xenon and Argon

2021

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“…Gas hydrates are nonstoichiometric crystalline compounds formed when hydrogen-bonded water molecules form cavities that can be occupied by smaller gas molecules (such as CH 4 , C 2 H 4 , C 2 H 6 , and C 3 H 8 ) at suitable temperatures and pressures. It has been recognized that a series of new technologies can be developed based on the hydrate principle, e.g., the storage of natural gases in the form of hydrates [1,2] and the separation of gas mixtures via hydrate formation [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…It has been recognized that a series of new technologies can be developed based on the hydrate principle, e.g., the storage of natural gases in the form of hydrates [1,2] and the separation of gas mixtures via hydrate formation [3,4]. However, there is a common bottleneck with respect to these technologies in that the hydrate formation rate is very low in usual cases.…”

Section: Introductionmentioning

confidence: 99%

Solubility measurement of methane in aqueous solution of sodium dodecyl sulfate at ambient temperature and near hydrate conditions

Peng

Chen

Luo

et al. 2006

Journal of Colloid and Interface Science

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“…The hydrate phase is enriched with the component forming a more stable hydrate [10][11][12][13][14][15]. It is known that helium, hydrogen, and neon do not form gas hydrates at relatively low pressure (several hundreds of bar).…”

Section: Introductionmentioning

confidence: 99%

Gas Hydrate Formation by Methane‐Helium Mixtures

et al. 2011

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Equilibrium conditions for gas hydrates formed by methane-helium mixtures with helium concentrations of 31.9, 63.9, and 74.6 mol.-% have been studied at pressures up to 160 bar. The data obtained indicate that in the studied range of helium concentrations and pressures helium hardly contributes to the stability of the gas hydrate formed. The shift of equilibrium conditions to lower temperatures and higher pressures is caused by dilution of methane in the gas phase and, consequently, the decrease in the chemical potential of methane in the gas phase. IntroductionGas hydrates are inclusion compounds in which the host framework is composed of hydrogen-bonded water molecules. Guest molecules occupy cavities of this framework. Under normal conditions the guest species are gases or volatile liquids [1]. At comparatively low pressures three structural types of gas hydrates are most abundant, namely, the cubic structures I and II, and structure H (or hexagonal structure III) [1][2][3][4]. Gas hydrate studies are highly topical due to the following reasons: (i) substantial deposits of natural gas hydrates in the earth's crust; (ii) necessity of prevention of hydrate formation in the course of gas and oil production; (iii) possibility of storage and transportation of natural gas in the form of gas hydrates, and (iv) separation of gas mixtures through hydrate formation [1,[3][4][5][6][7][8][9].The gas hydrate method of gas mixture separation is based on the differences in the stability of gas hydrates formed by different hydrate formers. The hydrate phase is enriched with the component forming a more stable hydrate [10][11][12][13][14][15]. It is known that helium, hydrogen, and neon do not form gas hydrates at relatively low pressure (several hundreds of bar). Due to this reason, the usage of gas hydrates appears to be promising for separating the above light gases from gas mixtures, in particular for concentrating helium when obtaining it from natural gas. The development of gas hydrate methods for separation of gas mixtures requires data of the phase diagrams of the systems gas mixture/water. For the hydrate-forming systems involving hydrogen, a relatively large amount of information has been accumulated, e.g., in [10,[16][17][18][19][20][21][22][23][24]. At the same time, only few papers have been published concerning the systems with helium [25][26][27][28][29]. In [26,27], helium hydrates were studied at very high pressures, and [29] deals with calculations. Insufficient experimental information concerning the role of helium in gas hydrate formation in the practically interesting range of pressures stimulated our interest for this subject. In the present communication, the results on the equilibrium conditions for gas hydrates formed by a mixture of methane and helium as well as informations concerning helium concentration in the hydrates formed are described. Materials and MethodsThe curves of hydrate decomposition were studied with the apparatus and experimental procedure described in [30]. The maximum possible err...

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Cited by 28 publications

References 1 publication

Application of Gas Hydrates in the Separation and Purification of Xenon from a Mixture of Xenon and Argon

Application of Gas Hydrates in the Separation and Purification of Xenon from a Mixture of Xenon and Argon

Solubility measurement of methane in aqueous solution of sodium dodecyl sulfate at ambient temperature and near hydrate conditions

Gas Hydrate Formation by Methane‐Helium Mixtures

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