Clathrate hydrates

Englezos, Peter

doi:10.1021/ie00019a001

Cited by 916 publications

(563 citation statements)

References 153 publications

(227 reference statements)

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“…Among the common components in natural gas, methane, ethane, propane, isobutane, nitrogen, hydrogen sulphide, and carbon dioxide are all hydrate formers [5]. Gas hydrates have significant applications, as they are known as potential energy source that will replace fossil fuel [7]. In addition, they can be applied in other areas such as, gas storage and transportation [8,9], sea water desalination [10] and CO 2 capture and sequestration [11].…”

Section: Overview Of Gas Hydrate Formationmentioning

confidence: 99%

Gas Hydrate Formation Phase Boundary Behaviour of Synthetic Natural Gas System of the Keta Basin of Ghana

Broni-Bediako¹,

Amorin²,

Bavoh³

2017

TOPEJ

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Background:Gas hydrates are considered as a major threat to the oil and gas flow assurance industry. At high pressure and low temperature conditions, gas hydrates form in pipelines and production facilities leading to pipeline blockages, high removal cost, environmental hazards and loss of lives. For a successful prevention of gas hydrate formation, predicting the hydrate formation phase boundary of hydrocarbon fluid composition becomes very necessary. Objective and Method:In this study, computer simulation software called PVTSim was used to predict hydrate formation phase boundary of synthetic natural gas composition of the Keta basin of Ghana at pressure and temperature ranges of 43.09 bar -350 bar and 12.87 °C -27.29°Crespectively. The effect of changes in natural gas composition (N 2 and H 2 S) and the presence of four commonly used thermodynamic gas hydrate inhibitors (methanol, ethanol, diethylene glycol and monoethylene glycol) on the hydrate formation phase boundary is also discussed. Prior to the study, the accuracy of PVTSim was validated with the hydrate formation phase data in literature. Results and Conclusion:Results suggested that the hydrate formation phase boundary decreased with increasing N 2 composition and increased with increasing H 2 S composition, suggesting that, the presence of H 2 S increases the threat of hydrate formation. However, a reduction in hydrate formation threat was observed in the presence of all four commonly used gas hydrate thermodynamic inhibitors with methanol demonstrating the highest inhibition effect.

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Section: Overview Of Gas Hydrate Formationmentioning

confidence: 99%

Gas Hydrate Formation Phase Boundary Behaviour of Synthetic Natural Gas System of the Keta Basin of Ghana

Broni-Bediako¹,

Amorin²,

Bavoh³

2017

TOPEJ

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“…NGH can be stable over a wide range of pressures and temperatures. Three main structures of gas hydrates-cubic structure I (sI), cubic structure II (sII) and the hexagonal structure (sH) have been identified (Davidson et al, 1973;Englezos et al, 1993;Sloan et al, 2008;Veluswamy et al, 2014). The properties of ice, structures I and II gas hydrates is showed in Table 1 (Aregba et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Review of exploration and production technology of natural gas hydrate

Cui

Lü

et al. 2018

Adv. Geo-Energy Res.

108

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Abstract:Natural gas hydrate is an ice-like substance which is sometimes called "combustible ice" since it can literally be lighted on fire and burned as fuel. Natural gas hydrate is characterized by widespread distribution, large reserves and little pollution. This paper introduced the distributions of hydrate, hydrate reserves and properties of hydrate. The main exploration methods, such as geophysical exploration and geochemical exploration have been presented. In addition, the main production techniques of natural gas hydrate including depressurization, thermal stimulation and chemical injection have been summed up. Finally, the challenges and outlooks of natural gas hydrate production have been proposed.

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“…Thirteen years later, John Faraday confirmed these results and until the 1930s, research conducted on gas hydrates was purely academic. The industry became interested in gas hydrates in 1934 soon after Hammerschmidt discovered that hydrates can form in gas and oil pipelines and cause major operation upsets by clogging pipelines and major equipment such as heat exchangers (Englezos, 1993). As a result of this major discovery, a great deal of research took place in order to understand hydrate formation and develop several different ways to inhibit their formation.…”

Section: Introductionmentioning

confidence: 99%

“…As a result of this major discovery, a great deal of research took place in order to understand hydrate formation and develop several different ways to inhibit their formation. In the 1960s research in gas hydrates took another major step forward after the discovery of vast quantities of natural gas hydrates in the earth's crust (Englezos, 1993). The amount of natural gas reserves found within hydrates is estimated to be 2× 10 16 m 3 , which is believed to be almost twice as much as the fossil fuel reserves (Whiticar, 2001).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The effect of biological and polymeric inhibitors on methane gas hydrate growth kinetics

Al-Adel

Dick

El-Ghafari

et al. 2008

Fluid Phase Equilibria

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Gas hydrates, also known as clathrate hydrates, are non-stoichometric crystalline compounds that have an "ice-like" appearance. They occur when water molecules hydrogen bond to form cavities that can be occupied by a gas or volatile liquid. The inclusion of these guest molecules stabilizes the water network. Hydrates are a nuisance to the gas processing industry as they plug pipelines and equipment which can upset daily operations and add unnecessary maintenance costs.In this work, kinetic experiments were performed on a methane-water system in the presence of Antifreeze Proteins (AFP`s) in order to elucidate their effectiveness as a kinetic hydrate inhibitor. The results were compared to experiments done with a classical

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Clathrate hydrates

Cited by 916 publications

References 153 publications

Gas Hydrate Formation Phase Boundary Behaviour of Synthetic Natural Gas System of the Keta Basin of Ghana

Gas Hydrate Formation Phase Boundary Behaviour of Synthetic Natural Gas System of the Keta Basin of Ghana

Review of exploration and production technology of natural gas hydrate

The effect of biological and polymeric inhibitors on methane gas hydrate growth kinetics

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