Modeling recovery of natural gas from hydrate reservoirs with carbon dioxide sequestration: Validation with Iġnik Sikumi field data

Palodkar, Avinash V.; Jana, Amiya K.

doi:10.1038/s41598-019-55476-1

Cited by 23 publications

(29 citation statements)

References 40 publications

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“…5 Since the direct extraction of natural gas (majorly, methane) from the hydrate deposits poses a severe threat to the ecosystem at large, its replacement with a thermodynamically similar and relatively stable CO 2 hydrate is proposed. 6,7 Concurrently, these same (physicochemical) characteristics tout CO 2 to be a preferred former for the hydrate-based seawater desalination. 8,9 Thus, comprehending the formation mechanism and stability of the CO 2 hydrates becomes necessary for the efficient process design.…”

Section: Introductionmentioning

confidence: 91%

Carbon Dioxide Hydrate Growth Dynamics and Crystallography in Pure and Saline Water

Dongre

Thakre

Palodkar

et al. 2020

Crystal Growth & Design

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To develop the crucial concepts of clathrate hydrates toward the hydrate-based technological implications, it is indispensable to comprehend their formation and growth mechanisms and stability in pure and saline water environments. In this view, we provide fundamental insights into the gas hydrate dynamics by carefully conducting a molecular dynamics simulation in an extensive range of carbon dioxide (CO 2 ) gas (CO 2 /H 2 O from 1:5 to 1:18) and sodium chloride (NaCl) salt (from 0.0 to 18.0 wt %) concentrations. Using the F 4φ order parameter and the radial distribution function, we assess the important information about the time evolution of the visualization states and the formation and growth of small (5 12 ) and large (5 12 6 2 and 5 12 6 4 ) cages of hydrates along with their crystalline nature. We found that (1) CO 2 forms the pure S−I type of hydrate structure irrespective of guest gas and salt concentrations; (2) lower CO 2 gas concentration (CO 2 /H 2 O from 1:8 to 1:18) leads to fast but incomplete conversion of water to hydrate, while the higher CO 2 gas concentration (1:6) causes the phase separation and consequent sluggish hydrate growth; (3) 1:7 is an optimum CO 2 /H 2 O ratio for the rapid, complete, and properly ordered hydrate growth; (4) at the optimum amount of CO 2 and H 2 O, the lower range of salt concentrations (0.0−5.0 wt %) has a slight inhibition effect on the hydrate growth, while there is a notable inhibition effect for the higher salt concentrations (7.0−18.0 wt %); (5) the number of oxygen atoms of water present in the first coordination sphere remains constant for the lower salt concentrations (0.0−5.0 wt %), and they get reduced with the higher salt concentrations (7.0−18.0 wt %); (6) the inhibition effect is due to the reduction of CO 2 solubility in the aqueous phase in the presence of salt ions. These novel findings provide useful assistance for choosing an appropriate combination of the imperative elements of gas hydrate systems toward carbon dioxide separation, sequestration, storage, and transportation.

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Section: Introductionmentioning

confidence: 91%

Carbon Dioxide Hydrate Growth Dynamics and Crystallography in Pure and Saline Water

Dongre

Thakre

Palodkar

et al. 2020

Crystal Growth & Design

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“…The advantage of this process is that it does not require melting of the gas hydrate, thus preventing sand production during the gas production. There has been one field test in Alaska where a flue gas containing CO 2 was injected into a gas hydrate formation. , Results proved the success of CO 2 –CH 4 exchange, but the CH 4 production rate was too slow for commercialization at the prevailing gas price.…”

Section: Global Co2 Storage Capacity By Ccsmentioning

confidence: 99%

“…There has been one field test in Alaska where a flue gas containing CO 2 was injected into a gas hydrate formation. 206,207 Results proved the success of CO 2 −CH 4 exchange, but the CH 4 production rate was too slow for commercialization at the prevailing gas price.…”

Section: Global Co 2 Storage Capacity By Ccsmentioning

confidence: 99%

The Role of Carbon Capture and Storage in the Energy Transition

et al. 2021

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In this paper, we review and analyze the salient features of the ongoing energy transition from a high to a low carbon economy. Our analysis shows that this transition will require decarbonizing the power, transport, and industry sectors, and the transition pathway will be country-specific. Carbon capture and storage (CCS) technologies will play a major role in this energy transition by decarbonizing existing and new fossil fuel power plants and the production of low-carbon fossil-fuel-based blue hydrogen. Blue hydrogen can be used for hydrogen fuel cell mobility in the transport sector and heat and feedstock in the industry sector. Current estimates show that there is adequate CO2 storage capacity in the world’s saline aquifers and oil and gas reservoirs to store 2 centuries of anthropogenic CO2 emission. However, the slow pace of CCS implementation is concerning and is due, in part, to too low of an oil price to make CO2-enhanced oil recovery profitable, lack of financial incentives for CO2 geological storage, low public acceptance, lack of consistent government energy policy and CCS regulations, and high capital investment. We propose several ways to accelerate CCS implementation. Among others, they include establishing regional CCS corridors to make use of economy of scale, public CCS engagement, carbon pricing, and using public–private partnership for financing, technology transfer, and linking up different stakeholders.

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“…However, as NGH are responsible for maintaining the stratum of the seafloor, the use of direct-destructive methods can invite geological disasters such as earthquakes, submarine landslides, etc. These potential disasters can be overcome by employing a non-destructive mining mechanism for natural gas recovery from their hydrate reservoirs 4 .…”

Section: Introductionmentioning

confidence: 99%

Microsecond molecular dynamics of methane–carbon dioxide swapping in pure and saline water environment

Palodkar

Dongre

Thakre

et al. 2022

Sci Rep

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This work aims at proposing the nondestructive methane-carbon dioxide (CH4–CO2) replacement mechanism as an ecofriendly energy production technique from the natural gas hydrate reserves in seafloor and permanently frozen grounds. Although the experimental data is widely available in literature, this replacement mechanism has not been elucidated at molecular level. In this contribution, we perform the microsecond level molecular dynamic simulations to evaluate two different CH4–CO2 replacement mechanisms: (i) direct CH4 displacement from hydrate structure, and (ii) dissociation of existing methane hydrate followed by a reformation of mixed CH4–CO2 hydrates. For this, we analyze CH4–CO2 replacement in three different modes i.e., CO2 as a replacing agent in (i) absence of free water molecules, (ii) presence of free water molecules, and (iii) presence of salt ions and free water molecules. Despite slow kinetics in the first mode, pure CO2 is observed to replace the methane more efficiently, while in the second mode, CO2 forms a new mixed hydrate layer on the existing seed crystal. However, in the third mode, salt ions help in destabilizing the methane hydrate and allow CO2 to form the hydrates. This proves that salt ions are favorable for CH4–CO2 replacement.

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Modeling recovery of natural gas from hydrate reservoirs with carbon dioxide sequestration: Validation with Iġnik Sikumi field data

Cited by 23 publications

References 40 publications

Carbon Dioxide Hydrate Growth Dynamics and Crystallography in Pure and Saline Water

Carbon Dioxide Hydrate Growth Dynamics and Crystallography in Pure and Saline Water

The Role of Carbon Capture and Storage in the Energy Transition

Microsecond molecular dynamics of methane–carbon dioxide swapping in pure and saline water environment

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