Experimental study and kinetic modeling on THF hydrate formation under a static electric field

Hejazi, Sima; Pahlavanzadeh, Hassan; Manteghian, Mehrdad

doi:10.1016/j.jngse.2021.104162

Cited by 9 publications

(5 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By using tetrahydrofuran (THF) to form the hydrate, the second series of experiments on the hydrate with different thicknesses were developed. THF has good miscibility with water and can generate a hydrate under atmosphere pressure, and moreover, the dielectric properties of the THF hydrate are quite similar to those of methane hydrate 21 . Hence, all the conclusions obtained with THF hydrate can provide sufficient reference value to the future application of this sensing method on methane hydrate.…”

Section: Introductionmentioning

confidence: 74%

“…THF has good miscibility with water and can generate a hydrate under atmosphere pressure, and moreover, the dielectric properties of the THF hydrate are quite similar to those of methane hydrate. 21 Hence, all the conclusions obtained with THF hydrate can provide sufficient reference value to the future application of this sensing method on methane hydrate. Then the detecting features of the resonator sensor on hydrate layer thickness were studied at different resonating modes.…”

Section: Introductionmentioning

confidence: 84%

See 1 more Smart Citation

Noncontact monitoring of thin hydrate layers with microwave cavity resonator

Wang

Xing

et al. 2022

Energy Science & Engineering

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 84%

Noncontact monitoring of thin hydrate layers with microwave cavity resonator

Wang

Xing

et al. 2022

Energy Science & Engineering

View full text Add to dashboard Cite

show abstract

“…A structure transformation of the hydrate lattice to a less H-bonded configuration was clearly indicated when an electric field is applied, which is accompanied by the release of guest species from the hydrates. On the other hand, under a weak or moderate electric field, previous experimental results demonstrate that the external electric field can play a significant role in the kinetics of hydrate formation. − Chen et al reported that a weak electric field could affect the induction time and growth rate of tetrahydrofuran (THF) hydrate by controlling the voltage across the two electrodes placed on the two sides of the reactor. Moreover, gas hydrate nucleation can be significantly promoted with the induction time reduced by 5.8 times under an electric field of 10 4 V/m, accompanied by the rearrangements of water molecules …”

Section: Resultsmentioning

confidence: 99%

Electric Field-Controlled Structural Instability and Mechanical Properties of Methane Hydrates

Cao

Sheng

Sveinsson

et al. 2022

Crystal Growth & Design

View full text Add to dashboard Cite

Gas hydrates play a significant role in the broad areas of energy applications and climate changes. Furthermore, externally applied fields by charged sediments and artificial activities are of paramount importance for transitions between disordered and ordered gas hydrate systems on the Earth. Herein, the role of external static electric fields in the structural instability and mechanical properties of methane hydrates are explored using molecular dynamics simulation methods. Our simulation results show that mechanical characteristics of methane hydrates such as Young's modulus, strengths, and failure modes are greatly affected by strengths and imposed directions of external electric fields. Interestingly, strong electric fields can result in the distortion and dissociation of local water cages in methane hydrates mainly due to realignments of water molecules, thereby weakening their mechanical properties. Moreover, instability failure modes of methane hydrates can be attributed to notable reorientations of water molecules and molecular diffusions of water and methane molecules in methane hydrates. This work provides new insights into mechanics of natural crystalline gas hydrates, which is also helpful for understanding the mechanical instability of charged sediment−host natural gas hydrates.

show abstract

“…Tetrahydrofuran (THF), tetra- n -butylammonium bromide (TBAB), and cyclopentane (CP) as hydrate promotors have been studied by a large number of researchers. − These additives can effectively improve the hydrate growth rate and significantly alleviate the harsh conditions required for hydrate formation . THF can react with water to form a structure I hydrate, which can also promote the formation of a gas hydrate. , Sun and Kang studied the CO 2 hydrate formation process with THF. They confirmed thatTHF can drastically reduce the required CO 2 hydrate formation pressure.…”

Section: Introductionmentioning

confidence: 99%

“…21 THF can react with water to form a structure I hydrate, which can also promote the formation of a gas hydrate. 22,23 Sun and Kang 24 studied the CO 2 hydrate formation process with THF. They confirmed thatTHF can drastically reduce the required CO 2 hydrate formation pressure.…”

Section: Introductionmentioning

confidence: 99%

Hydrate Phase Equilibrium Data of Dimethyl Ether in the Presence of Tetrahydrofuran, Tetra-n-butylammonium Bromide, and Cyclopentane

et al. 2022

View full text Add to dashboard Cite

Hydrate cold storage and refrigeration technology have a good prospect. Dimethyl ether (DME) has the characteristics of low pollution and a good refrigeration effect, which can replace freon as a refrigerant to reduce pollution due to the greenhouse effect and ozone depletion. Tetrahydrofuran (THF), tetrabutylammonium bromide (TBAB), and cyclopentane (CP) are common hydrate growth promotors. To comprehend the effect of additives on the hydrate phase equilibrium, the phase equilibrium conditions for the DME hydrate and with THF (0.095, 0.190 mass fractions), TBAB (0.160 mass fractions), or CP (0.093 mass fractions) were measured. The formation conditions of the DME hydrate are more moderate than that of the CO2 hydrate. Moreover, the addition of CP with a mass fraction of 0.093 has the best promotion effect. The results provide a basis for both cold storage technology and refrigeration technology.

show abstract

Experimental study and kinetic modeling on THF hydrate formation under a static electric field

Cited by 9 publications

References 38 publications

Noncontact monitoring of thin hydrate layers with microwave cavity resonator

Noncontact monitoring of thin hydrate layers with microwave cavity resonator

Electric Field-Controlled Structural Instability and Mechanical Properties of Methane Hydrates

Hydrate Phase Equilibrium Data of Dimethyl Ether in the Presence of Tetrahydrofuran, Tetra-n-butylammonium Bromide, and Cyclopentane

Contact Info

Product

Resources

About