Economic evaluation of natural gas hydrate as an alternative for natural gas transportation

Javanmardi, Jafar; Nasrifar, Khashayar; Najibi, Seyed Hesam; Moshfeghian, Mahmood

doi:10.1016/j.applthermaleng.2004.10.009

Cited by 196 publications

(111 citation statements)

References 10 publications

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“…The stability of gas hydrates and their effect on global warming may become an issue and needs to be investigated. Depending on the stability of the gas hydrates, a 1 or 2°C increase in the temperature of the ocean might possibly cause the release of methane into the atmosphere with all the ensuing impacts on climate changes (Javanmardi et al, 2005).…”

Section: Scope Of Studies On Gas Hydratesmentioning

confidence: 99%

“…Figure 1. The relationship among the actual zone of gas hydrate (MHZ), the zone of methane gas hydrate stability (MHSZ), and the free gas zone for a particular geotherm and an assumed seafloor pressure corresponding to 2500 m water depth (Javanmardi et al, 2005).…”

Section: Present Status Of Gas Hydrate Applicationsmentioning

confidence: 99%

“…Deep offshore Extraction. For companies in charge of the drilling of new wells in deep and ultra deep offshore environments, the plugging of annulars by hydrate formation in drilling muds is an important issue (Javanmardi et al, 2005).…”

Section: Scope Of Studies On Gas Hydratesmentioning

confidence: 99%

“…Under pressure, pipelines can be plugged with gas hydrate in the form of ice. Today every oil and gas company has a flow assurance department responsible for detecting and predicting the formation of gas hydrates in the pipelines and the processing equipment (Javanmardi et al, 2005).…”

Section: Scope Of Studies On Gas Hydratesmentioning

confidence: 99%

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Dissociation and Subsidence of Hydrated Sediment: Coupled Models

Pallipurath¹

2009

Energy Exploration & Exploitation

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Thermal dissociation of hydrated sediment by a pumped hot fluid is modeled. A radial heat flow from the hot pipe is assumed. The coordinate system is cylindrical. Three components (hydrate, methane and water) and three phases (hydrate, gas, and aqueous-phase) are considered in the simulator. The intrinsic kinetics of hydrate formation or dissociation is considered using the KimBishnoi model. Mass transport, including two-phase flow, molecular diffusions and heat transfer involved in formation or dissociation of hydrates are included in the governing equations, which are discretized with finite volume difference method and are solved in an explicit manner. The strength deterioration of the hydrate bed as a result of dissociation is investigated with a geo-mechanical model. The way in which dissociation affects the bed strength is determined by plugging in the porosity and saturation change as a result of dissociation into the sediment collapse equations. A mechanism to measure the pore pressure changes occurring due to dissociation is developed. The rate of collapse as dissociation proceeds is determined and the model thus enables the definition of a safety envelope for gas hydrate drilling.

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Section: Scope Of Studies On Gas Hydratesmentioning

confidence: 99%

Section: Present Status Of Gas Hydrate Applicationsmentioning

confidence: 99%

Section: Scope Of Studies On Gas Hydratesmentioning

confidence: 99%

Section: Scope Of Studies On Gas Hydratesmentioning

confidence: 99%

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Dissociation and Subsidence of Hydrated Sediment: Coupled Models

Pallipurath¹

2009

Energy Exploration & Exploitation

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“…Hydrates have unique gas storage properties, as they can contain 180 volumes (standard temperature, pressure) of natural gas per volume of hydrate 3 and could be stored at 258 K under atmospheric pressure for 15 days, retaining almost all the gas 4 . Storage of natural gas in the form of clathrate hydrates is of interest since hydrates can be produced under moderate conditions and can be stored at a typical temperature of 273 K under reasonable pressures of 1-2 MPa 5, 6 . In contrast, the conditions for conventional natural gas storage technologies are extreme, for example, the pressure of 20 MPa for compressed natural gas and temperature of 113 K for liquefi ed natural gas 7 .…”

Section: Introductionmentioning

confidence: 99%

Natural gas hydrate promotion capabilities of toluene sulfonic acid isomers

Jarrahian

Heidaryan

2014

Polish Journal of Chemical Technology

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The purpose of this study was to investigate the natural gas hydrate promotion capabilities of the hydrotrope Toluene Sulfonic Acid (TSA) isomers as an additive. The capabilities of TSA isomers were measured with different concentrations. The optimum additive concentration for hydrate formation was determined for the given pressure, temperature, mixing condition, and cooling time. The natural gas hydrate promotability of para-TSA was found to be 20% and 35% more than meta-TSA and ortho-TSA respectively at the optimum concentration. Beyond the optimum TSA concentration, the hydrate formation declined as the ice formation reduced the overall gas-to-water volume ratio in the hydrates

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Methane conversion rate into structure H hydrate crystals from ice

2007

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in Wiley InterScience (www.interscience.wiley.com).The methane uptake and conversion rate to structure H (sH) hydrates was measured and compared to crystallization kinetics models. Three large molecule guest substances (LMGS) were used as sH hydrate formers: neohexane (NH), methylcyclohexane (MCH), and tert-butyl methyl ether (TBME). The initial crystallization occurred quickly at the LMGS liquid-ice interface until $20-30% of ice was converted into hydrate (hydrate growth stage I). Slower hydrate crystal growth was observed after a hydrate film covered the ice surface at a rate of 3-400 nm 2 /h (hydrate growth stage II). The TBME system showed the fastest kinetics at the beginning of the reaction followed by NH and MCH system. However the trend changed when the temperature was increased (''reaction'' stage III). Surprisingly, the conversion rate achieved with the TBME system upon melting the ice was the smallest. This was attributed to the strong interaction of TBME with water molecules that increased the energy barrier for water molecules to form hydrate cages. The conversion rates were well correlated with the Avrami equation and the shrinking core model. Finally, NH was found to be the best LMGS in this study to obtain full conversion within a short reaction time and achieving high methane gas storage in the hydrate.

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Economic evaluation of natural gas hydrate as an alternative for natural gas transportation

Cited by 196 publications

References 10 publications

Dissociation and Subsidence of Hydrated Sediment: Coupled Models

Dissociation and Subsidence of Hydrated Sediment: Coupled Models

Natural gas hydrate promotion capabilities of toluene sulfonic acid isomers

Methane conversion rate into structure H hydrate crystals from ice

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