CO2 disposal as hydrate in ocean sediments

Qanbari, Farhad; Pooladi‐Darvish, Mehran; Tabatabaie, S. Hamed; Gerami, Shahab

doi:10.1016/j.jngse.2011.10.006

Cited by 57 publications

(32 citation statements)

References 34 publications

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“…While hydrate inhibitors have attracted the remarkable attention of researchers since gas hydrates were found to cause flow plugging of submarine gas/oil pipelines [3][4][5], gas hydrate promoters are an emerging research area. Very active activities of recent studies have aimed at developing well-performing promoters for novel approaches to gas storage and transportation [5][6][7], gas separation [8][9][10][11][12][13][14][15] and sequestration of anthropogenic carbon dioxide [16][17][18][19] via a mean of gas hydrates.…”

Section: Introductionmentioning

confidence: 99%

Unexpected inhibition of CO2 gas hydrate formation in dilute TBAB solutions and the critical role of interfacial water structure

Nguyễn

Nguyen

et al. 2016

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Gas hydrates formed under moderated conditions open up novel approaches to tackling issues related to energy supply, gas separation, and CO 2 sequestration. Several additives such as tetra-n-butylammonium bromide (TBAB) have been empirically developed and used to promote gas hydrate formation. Here we report unexpected experimental results which show that TBAB inhibits CO 2 gas hydrate formation when used at minuscule concentration. We also used spectroscopic techniques and molecular dynamics simulation to gain further insights and explain the experimental results. They have revealed the critical role of water alignment at the gas-water interface induced by surface adsorption of tetra-n-butylammonium cation (TBA +) which gives rise to the unexpected inhibition of dilute TBAB solution. The water perturbation by TBA + in the bulk is attributed to the promotion effect of high TBAB concentration on gas hydrate formation. We explain our finding using the concept of activation energy of gas hydrate formation. Our results provide a step toward to mastering the control of gas hydrate formation.

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Section: Introductionmentioning

confidence: 99%

Unexpected inhibition of CO2 gas hydrate formation in dilute TBAB solutions and the critical role of interfacial water structure

Nguyễn

Nguyen

et al. 2016

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“…In the pure CO 2 case (N=100), we supposed here that the CO 2 accumulation cannot exceed twice the depth difference between the neutral buoyancy level and the hydrate formation level as supported by modeling calculations of (Qanbari et al, 2012). This volume which may host only liquid CO 2 is a conservative estimate of the total available volume (GHSZ is not taken into account in our calculation).…”

Section: Theoretical Storage Volumes Using Gasco2 and Gmtmentioning

confidence: 91%

“…The hydrate formation kinetics will tend to resist the buoyancy-driven migration. As this migration is much lower just below the neutral buoyancy level than at the hydrate formation level, the volume above the neutral buoyancy level is very difficult to access (only by diffusion in the very long term), as supported by modeling calculations of (Qanbari et al, 2012). We supposed here that the theoretical storage volume is the porous volume in the sub-domain where NBZ is included in GHSZ and lies between the GHSZ"s lower limit (bottom boundary) and the NBZ"s lower limit (top boundary) ( Figure 7).…”

Section: Theoretical Storage Volumes Using Gasco2 and Gmtmentioning

confidence: 99%

Influence of impurities (nitrogen and methane) on the CO2 storage capacity as sediment-hosted gas hydrates – Application in the area of the Celtic Sea and the Bay of Biscay

Burnol

Thinon

Ruffine

et al. 2015

International Journal of Greenhouse Gas Control

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Deep saline aquifers are the most important potential storage reservoirs for CO 2 under supercritical conditions. Another option is the trapping of CO 2 in deep-sea sediments at low temperature, either in liquid state or as gas hydrates. The Negative Buoyancy Zone (NBZ) and the Gas Hydrate Stability Zone (GHSZ) are used to calculate the theoretical storage volume. It depends essentially on the geothermal gradient and on the quality of the injected CO 2. A sensitivity analysis shows that the storage volume in the Celtic Sea and the Bay of Biscay area is one order of magnitude lower if the injected fluid contains impurities like nitrogen or methane. Overall, the storage capacity in the French Exclusive Economic Zone (EEZ) exceeds 100 years of storage of the current French CO 2 emissions from large point sources. The conservative estimate of the EEZ storage capacity is found to be higher than in the deep saline aquifers of the Paris Basin. Moreover, the CO 2 storage capacity in this area is doubled when considering the zone beyond 200 miles from the shores. The implications of these results are potentially important for the long-term deployment strategy for CO 2 storage in France and in Western Europe.

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“…Thus the method is based on heating and decay of methane clathrates by the heat released during formation of carbon dioxide clathrates after its injection into the deposit of methane clathrates. CO 2 clathrate stability zone is similar to the stability zone of CH 4 clathrates, except that CO 2 clathrates are more stable [22,23]. Compared to CH 4 clathrates, CO 2 clathrates require lower pressure to achieve stability [24].…”

Section: Technologies Of Methane Extraction From Clathratesmentioning

confidence: 99%

Hazards of uncontrolled methane release from clathrates analyse and environmental evaluation of extraction methods

Cieślak

Gaj

2014

Environ. Protect. Eng.

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Uncontrolled methane release from clathrates may intensify global warming, causes deoxygenation and changes of pH of oceanic water, prompt tsunami and other hazards. On the other hand, it can be a great source of unconventional fossil fuels in the future, when conventional sources will be depleted and renewable sources not enough developed. The problem is how to ensure its safe exploitation. Methane clathrate breakdown, environmental impacts and feedback between them are presented and possible commercial methods of methane exploitation are compared. Finally, a selected method of methane clathrate exploitation that minimalizes environmental hazards is proposed. Among possible methods such as thermal stimulation, depressurization, inhibitor injection and gas exchange, only the latter one is ecologically friendly and can diminish climate warming with simultaneous CO 2 sequestration.

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CO2 disposal as hydrate in ocean sediments

Cited by 57 publications

References 34 publications

Unexpected inhibition of CO2 gas hydrate formation in dilute TBAB solutions and the critical role of interfacial water structure

Unexpected inhibition of CO2 gas hydrate formation in dilute TBAB solutions and the critical role of interfacial water structure

Influence of impurities (nitrogen and methane) on the CO2 storage capacity as sediment-hosted gas hydrates – Application in the area of the Celtic Sea and the Bay of Biscay

Hazards of uncontrolled methane release from clathrates analyse and environmental evaluation of extraction methods

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