Laboratory demonstration of the stability of CO2 hydrates in deep-oceanic sediments

Qureshi, M. Fahed; Zheng, Junjie; Khandelwal, Himanshu; Venkataraman, Pradeep; Usadi, Adam K.; Barckholtz, Timothy A.; Mhadeshwar, Ashish B.; Linga, Praveen

doi:10.1016/j.cej.2021.134290

Cited by 63 publications

(34 citation statements)

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“…A promising method for sequestration is CO 2 storage in deep-oceanic sediments as gas hydrates. − Gas hydrates are crystalline compounds made up of water and one or more hydrate-forming compound, such as CO 2 , methane, and other hydrocarbons. − The hydrate-forming molecules are maintained in a metastable crystal lattice formed of water molecules by van der Waals forces within the hydrates , and offer high storage capacity (ideally 184 volumes of gas/volume of water) . Under sufficient depth from the surface, CO 2 hydrates could be formed on the seafloor or within the sediments. , Natural gas hydrates are stable and naturally found in oceanic sediments and permafrost locations, with traces of other gases, such as ethane, CO 2 , and H 2 S. − Gas hydrates are stable in nature as a result of the prevalent high-pressure and low-temperature conditions in oceanic sediments and permafrost locations. − CO 2 forms hydrate structure I (sI), and a unit cell is made up of 46 hydrogen-bonded water molecules with two dodecahedral cages and six tetrakaidekahedral cages, each of which may theoretically store one CO 2 molecule. , In a large mass of hydrates, some cages may be empty. − Gas hydrates can act as a geological reservoir for CO 2 sequestration while also remaining stable as non-destructive structures, which might help to avoid problems, like seabed instability …”

Section: Introductionmentioning

confidence: 99%

“…24 Under sufficient depth from the surface, CO 2 hydrates could be formed on the seafloor or within the sediments. 25,26 Natural gas hydrates are stable and naturally found in oceanic sediments and permafrost locations, with traces of other gases, such as ethane, CO 2 , and H 2 S. 27−29 Gas hydrates are stable in nature as a result of the prevalent highpressure and low-temperature conditions in oceanic sediments and permafrost locations. 30−32 CO 2 forms hydrate structure I (sI), and a unit cell is made up of 46 hydrogen-bonded water molecules with two dodecahedral cages and six tetrakaidekahedral cages, each of which may theoretically store one CO 2 molecule.…”

Section: Introductionmentioning

confidence: 99%

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CO₂ Hydrate Formation Kinetics and Morphology Observations Using High-Pressure Liquid CO₂ Applicable to Sequestration

et al. 2022

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Carbon capture and sequestration is one of the critical approaches to reduce the carbon footprint and achieve net-zero carbon emissions by 2050 as per the Paris Agreement in 2015. The United Nations Climate Change Conference COP26 Glasgow in 2021 also intended to finalize implementation plans for the Paris Agreement. Capturing industrial CO2 emissions and injecting them as compressed liquid CO2 into the deep-ocean sediments to store as gas hydrates provides a potentially sustainable and long-term approach to reduce atmospheric CO2 emissions. However, the application of this method depends upon how fast liquid CO2 becomes converted to hydrates and the understanding of the underlying crystal morphological changes. In this work, the kinetics of CO2 hydrate formation using high-pressure liquid CO2 with/without an environmentally friendly hydrate promoter l-tryptophan has been examined along with the morphological imaging of interfacial interactions of liquid CO2, water, and the hydrate phase simultaneously. In addition to that, a mathematical model for quantifying hydrate formation kinetics employing liquid CO2 has also been presented. The experimental results indicate that the water to hydrate conversion of about 82% can be achieved using liquid CO2 in an experimental hydrate growth time of about 11 h. Three different stages of hydrate formation were identified in the experiments, namely, hydrate nucleation (stage 1), hydrate film formation (stage 2), and hydrate film breakup and bulk hydrate formation (stage 3). The kinetic enhancement effect of a kinetic promoter was elucidated using different dosages of l-tryptophan (300–1000 ppm). The experimental results indicated that the green kinetic promoter helps to enhance the overall water to hydrate conversion from 82 to 98% and reduces the overall hydrate formation process time by 2.5 times. These findings suggest a way forward to an enhanced formation of CO2 hydrates from liquid CO2.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CO₂ Hydrate Formation Kinetics and Morphology Observations Using High-Pressure Liquid CO₂ Applicable to Sequestration

et al. 2022

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“…HBS in sub-seafloor sediments has been demonstrated at the lab-scale/theoretical simulations by many researchers worldwide. ,, Still, no field trial has been reported so far. In a lab-scale study, Sun and Peter achieved 39–55% water-to-CO 2 hydrate conversion in 24 h, and Linga et al reported ∼63% conversion in 48 h, which may differ in various sediments depending on the porosity, permeability, particle size, geochemistry, and so forth .…”

Section: Introductionmentioning

confidence: 99%

Intensified Carbon Dioxide Hydrate Formation Kinetics in a Simulated Subsea Sediment: Application in Carbon Capture and Sequestration

Gautam

Kumar

2022

Energy Fuels

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To achieve the United Nations Climate Change Conference (COP-26) targets of net zero carbon emissions, hydrate-based carbon dioxide (CO 2 ) capture and sequestration (CCS) can be considered one of the potential sustainable technologies. However, the sluggish kinetics of CO 2 hydrate formation in the saline subsea environment and the nonecofriendly nature of the existing additives (kinetic promoters) are the major challenges. Therefore, to intensify the kinetics, the performance of the biocompatible hydrophobic amino acid Lleucine for CO 2 hydrate formation/dissociation was evaluated using the simulated subsea sediment of silica sand. Experiments were performed in saline (3.0 wt % NaCl) and nonsaline environments with L-leucine (0.1−1.0 wt %) at 3.2 ± 0.2 MPa pressure and 274.5 ± 0.2 K temperature. With the addition of 0.5 wt % L-leucine to freshwater, water-to-hydrate conversion of 73.01 ± 4.96% (44.08 ± 2.95% gas-to-hydrate conversion) was achieved with a rate of gas uptake of 4.25 ± 0.39 mmol/min, which is ∼10 times higher compared to the baseline (no promoter). Though salinity significantly reduced the hydrate formation kinetics, the addition of 1.0 wt % L-leucine intensified the rate of CO 2 uptake to 2.32 ± 0.319 mmol/min from 0.55 ± 0.033 mmol/min in saline water baseline. The enhanced kinetics reported in this work highlights the potential of engaging L-leucine in the hydrate-based CCS approach.

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“…The stability of CO 2 hydrates at conditions mimicking deep oceanic sediments has been recently demonstrated in the laboratory, 96 and progress has been made in the quantification of the fundamental properties of CO 2 hydrate formation and morphology. 97 Although these studies, and upcoming field tests, are related to sequestration, a recent techno-economic analysis suggests that using hydrates for CO 2 capture could be attractive commercially.…”

Section: State Of the Art And Fundamental Challengesmentioning

confidence: 99%

Upcoming Transformations in Integrated Energy/Chemicals Sectors: Some Challenges and Several Opportunities

Striolo

Huang

2022

J. Phys. Chem. C

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The sociopolitical events over the past few years led to transformative changes in both the energy and chemical sectors. One of the most evident consequences of these events is the significant focus on sustainability. In fact, rather than an engaging discussion within elite social circles, the search for sustainability is now one of the hard requirements investors impose on companies. The concept of sustainability itself has developed since its inception, and now it encompasses environmental as well as socioeconomic aspects. The major players in the energy and chemical sectors seem to embrace these changes and the related challenges; in most cases, tangible ambitious goals have been proposed. For example, bp aims "to become a net zero company by 2050 or sooner, and to help the world get to net zero". Although tragic events such as the war in Ukraine directly affect global supply chains, leading to some reconsiderations in medium-term industrial and political strategies, trends and public demands seem determined to pursue ambitious sustainable goals, as tangible as the European Union's "Fit for 55" climate package, approved on May 12, 2022, which effectively bans internal combustion engines for new passenger cars and light commercial vehicles from 2035. These trends will likely lead to profound changes in both the chemical and energy sectors. While some predictions may miss the target, speculating about upcoming challenges and opportunities could help us prepare for the future. This is the purpose of this brief Perspective.

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Laboratory demonstration of the stability of CO2 hydrates in deep-oceanic sediments

Cited by 63 publications

References 84 publications

CO₂ Hydrate Formation Kinetics and Morphology Observations Using High-Pressure Liquid CO₂ Applicable to Sequestration

CO₂ Hydrate Formation Kinetics and Morphology Observations Using High-Pressure Liquid CO₂ Applicable to Sequestration

Intensified Carbon Dioxide Hydrate Formation Kinetics in a Simulated Subsea Sediment: Application in Carbon Capture and Sequestration

Upcoming Transformations in Integrated Energy/Chemicals Sectors: Some Challenges and Several Opportunities

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Laboratory demonstration of the stability of CO2 hydrates in deep-oceanic sediments

Cited by 63 publications

References 84 publications

CO2 Hydrate Formation Kinetics and Morphology Observations Using High-Pressure Liquid CO2 Applicable to Sequestration

CO2 Hydrate Formation Kinetics and Morphology Observations Using High-Pressure Liquid CO2 Applicable to Sequestration

Intensified Carbon Dioxide Hydrate Formation Kinetics in a Simulated Subsea Sediment: Application in Carbon Capture and Sequestration

Upcoming Transformations in Integrated Energy/Chemicals Sectors: Some Challenges and Several Opportunities

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Product

Resources

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CO₂ Hydrate Formation Kinetics and Morphology Observations Using High-Pressure Liquid CO₂ Applicable to Sequestration

CO₂ Hydrate Formation Kinetics and Morphology Observations Using High-Pressure Liquid CO₂ Applicable to Sequestration