Enhanced clathrate hydrate formation kinetics at near ambient temperatures and moderate pressures: Application to natural gas storage

Veluswamy, Hari Prakash; Kumar, Sanjeev; Kumar, Rajnish; Rangsunvigit, Pramoch; Linga, Praveen

doi:10.1016/j.fuel.2016.05.068

Cited by 189 publications

(159 citation statements)

References 51 publications

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“…Addition of SDS (0.05 and 0.5 wt%) induces insignificant variations in the kinetics. Interestingly, gas consumption is in two stages and similar behaviour has been reported earlier [38,39].…”

Section: Kinetics Of Methane Uptake At Higher Pressuresupporting

confidence: 86%

“…(w) symbols are used to depict the similar observations with lesser (32.5 mL) amount of solution for hydrate formation (Ref. [39]). The dotted grey lines are guides to the eye.…”

Section: Methane Uptake At Higher Pressurementioning

confidence: 99%

“…There are some conflicting reports on the role of SDS in the THF + CH 4 /CO 2 system. Addition of SDS improves the kinetics in hydrate formation, while the gas consumption was reduced significantly [39]. On the other hand, simultaneous usage of SDS (0.05 wt%) in aq-THF (5 mol%) in THF + CO 2 hydrates allows faster nucleation and a significant increase in gas storage capacity [44].…”

Section: Methane Uptake At Higher Pressurementioning

confidence: 99%

“…Hydrate phase equilibrium data for the methane + THF + water system [32][33][34][35] along with kinetic studies on bubbling reactor [36] and stirred tank reactor [14,37] are reported in the literature. However, investigations of this system in quiescent unstirred setup under experimented conditions are at seldom in the literature [38,39].…”

Section: Introductionmentioning

confidence: 99%

“…Veluswamy et al [38,39] have conducted studies on storage capacity and gas uptake kinetics in CH 4 + THF + H 2 O system and have reported process scale-up using three different reactors, namely, in small (dia: 1.3 cm), medium (dia: 5.1 cm) and large (dia: 10.2 cm) using 2, 53 and 220 mL of aq-THF solution at comparable methane gas pressure. However, such scale-up is deceptive as both diameter and volume (height) of the solution vary.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigations on tetrahydrofuran – methane – water system: Rapid methane gas storage in hydrates

Kiran

Sowjanya

Yoon

2019

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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This study reports methane (CH4) gas storage capacity along with TetraHydroFuran (THF) as guest molecules in mixed hydrates. This process has been studied in two reactors of 100 and 400 mL capacity, having 4.5 and 7.5 cm internal diameter respectively, in non-stirred configuration. Experiments were conducted in each reactor at constant initial gas pressure (7.5 MPa) and by increasing the height of the solution from 1 to 8 cm, resulting in volume scale-up factor of 5. The total CH4 gas uptake (moles) passes through a maximum at around 50% volume of the reactor indicating a transition from gas-rich to solution rich conditions. Observed variations in gas uptake are within ±20% of the maximum, upon different solution volume from 35% to 70% of reactor’s volume. Another set of experiments were conducted keeping the amount of the solution constant and increasing gas pressure in the range of 0.5–11.0 MPa. The gas uptake increased upon an increase in the gas pressure, but this is at least 40% less compared to the theoretical estimate. The stirring of solution or addition of promoter (Sodium Dodecyl Sulfate, SDS) is also not effective in increasing the gas consumption. Kinetics of gas uptake, in both stirred and non-stirred conditions, are quicker and 90% of gas consumption occurs in an hour after the hydrate nucleation event.

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Section: Kinetics Of Methane Uptake At Higher Pressuresupporting

confidence: 86%

“…(w) symbols are used to depict the similar observations with lesser (32.5 mL) amount of solution for hydrate formation (Ref. [39]). The dotted grey lines are guides to the eye.…”

Section: Methane Uptake At Higher Pressurementioning

confidence: 99%

Section: Methane Uptake At Higher Pressurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Experimental investigations on tetrahydrofuran – methane – water system: Rapid methane gas storage in hydrates

Kiran

Sowjanya

Yoon

2019

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Gas Hydrates in Wastewater Treatment

Rehman¹,

Zaini²,

Lal³

2022

Gas Hydrate in Water Treatment

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Influence of different stirring setups on mass transport, gas hydrate formation, and scale transfer concepts for technical gas hydrate applications

2022

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This contribution describes the influence of turbulent flow conditions in the liquid and/or gas phase and directly in the phase interface, different flow patterns (axial/radial), volume‐specific power inputs, mass‐specific energy consumptions, as well as volume‐specific mass transfer coefficients on the gas hydrate formation, derived from an experimental investigation of five different reactor setups. The results correspond to all fields of gas hydrate research, especially actually discussed technical hydrate applications, like hydrate‐based desalination, gas storage, gas separation, biogas and green hydrogen handling, carbon dioxide deposition, new phase transfer materials, and even electrical power supply. Two main objectives, first, to determine favorable hydrate forming conditions in stirred systems to provide competitive hydrate formation processes, and second, the search for a concept to enable the transfer of experimental results, for example, from a stirred reactor to a pipeline system for inhibitor research, through the targeted adjustment of similar and comparable turbulent flow conditions in different reactor setups could be achieved. So far, the targeted formation of gas hydrates has been investigated essentially from the point of view of optimizing the formation conditions with regard to pressure and temperature as well as the addition of auxiliary materials and promoters. In addition, some studies consider different reactor types and setups, for example, spray reactors or bubble columns. In many publications, stirred and cooled pressure autoclaves are described, whereby the gas and the liquid phase are brought into contact with each other by mixing to a greater or lesser extent by an agitator, then forming a solid gas hydrate phase. Often missing in previous research work is a systematic approach for determining the influence of flow conditions on gas hydrate formation. Many different influencing factors in a stirred reactor system can strongly affect the kinetics and formation of gas hydrates, for example, stirrer type, rotational frequency, stirrer and reactor geometry, and filling level. This is the starting point of the present investigation that deals with the influence of the flow conditions on the formation of gas hydrates. Tests were performed in a stirred autoclave to measure the effects of different stirrer configurations. The results obtained contribute to the explanation of the hydrate formation mechanism and can be used to optimize the targeted production of gas hydrates in technical hydrate applications. A rapid, immediate, hydrate formation is advantageous and can be achieved by suitable flow conditions in stirred reactors, which is successfully proven within this study contribution.

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Enhanced clathrate hydrate formation kinetics at near ambient temperatures and moderate pressures: Application to natural gas storage

Cited by 189 publications

References 51 publications

Experimental investigations on tetrahydrofuran – methane – water system: Rapid methane gas storage in hydrates

Experimental investigations on tetrahydrofuran – methane – water system: Rapid methane gas storage in hydrates

Gas Hydrates in Wastewater Treatment

Influence of different stirring setups on mass transport, gas hydrate formation, and scale transfer concepts for technical gas hydrate applications

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