Methane hydrate formation in the presence of ZnO nanoparticle and SDS: Application to transportation and storage

Abdi-Khanghah, Mahdi; Adelizadeh, Mostafa; Naserzadeh, Zahra; Barati, Hossien

doi:10.1016/j.jngse.2018.04.005

Cited by 65 publications

(20 citation statements)

References 25 publications

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“…There have been a limited number of studies on surface-promoted nucleation of hydrates (a passive technique for nucleation promotion). Metals and metal oxide suspensions have been experimentally shown to assist in nucleation promotion and have also been studied in conjunction with surfactants. − Passive promotion and the underlying mechanisms have also been studied via molecular dynamics simulations. − A recent discovery by the present group involved the use of aluminum surfaces to promote the nucleation of CO 2 hydrates . Statistically significant measurements showed CO 2 hydrates nucleating in ∼3 h on aluminum surfaces (with no nucleation observed in the absence of aluminum).…”

Section: Introductionmentioning

confidence: 99%

Magnesium-Promoted Rapid Nucleation of Carbon Dioxide Hydrates

Kar

Acharya

Bhati

et al. 2021

ACS Sustainable Chem. Eng.

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Gas hydrates offer solutions in areas like CO 2 sequestration and desalination. However, their formation is severely limited by long induction (wait) times for nucleation, which range from hours to days. Many existing nucleation promotion techniques involve chemical additives, which invite environmental and process-related concerns. Here, we report a simple, passive, and environmentally friendly technique to significantly promote the nucleation of CO 2 hydrates: magnesium (in pure and alloy forms) triggers nucleation almost instantaneously. We report induction times of less than 1 min, which is the fastest induction time reported for any gas hydrate under stagnant conditions. This translates to Mg-promoted nucleation rates being 3000 times higher than the baseline. Statistically meaningful measurements of nucleation kinetics (in milliliter and liter-scale reactors), direct visualization of nucleation, and X-ray photoelectron spectroscopy (XPS)/Fourier-transform infrared spectroscopy (FTIR) analysis uncover several chemistry-related insights associated with Mg-based promotion. Importantly, the three-phase line of magnesium−water−CO 2 gas is key to promotion. Porous oxide layers, generation of H 2 nanobubbles, and chemisorption of CO 2 on Mg surfaces are other factors responsible for accelerated nucleation. Interestingly, Mg alloys exhibit faster nucleation promotion than pure Mg, which is significant in salt water medium. Overall, our work opens up pathways for faster synthesis of hydrates, which is critical to realizing applications.

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Section: Introductionmentioning

confidence: 99%

Magnesium-Promoted Rapid Nucleation of Carbon Dioxide Hydrates

Kar

Acharya

Bhati

et al. 2021

ACS Sustainable Chem. Eng.

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“…Gas hydrates are crystalline structures formed from water and gas molecules typically under conditions of low temperature and/or high pressure . Gas hydrates are useful for gas storage and transportation, − for desalination of seawater, − and as energy sources. , However, in gas and oil production, gas hydrate plugs may form, posing severe operational risks to the flowline in addition to production losses in terms of downtime and interrupted revenue. Hydrates can form in the bulk liquid phase as well as in deposits on the pipeline wall, aggravating pressure losses.…”

Section: Introductionmentioning

confidence: 99%

Measurements of Hydrate Formation Behavior in Shut-In and Restart Conditions

et al. 2019

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Transient operations in oil and gas production can result in conditions with a high potential for the formation of hydrate plugs. In restart operations, the shear flow and the increased pressure can induce rapid hydrate formation possibly leading to a plug or severe flow reduction. In order to study favorable and unfavorable restart conditions, experiments were performed in a high pressure cell coupled to a rheometer. Hydrate slurry behavior was investigated under transient conditions. Experiments were carried out in three-phase systems containing mineral oil or crude oil, water, and a model natural gas mixture of 92/8 mol % methane/propane. Two commercial antiagglomerants were added in the tests. Experiments were conducted at varying water volumetric fractions (10, 30, 50 vol %), subcooling (6 °C, 10 °C, 15 °C, 16 and 18 °C), pressure (42, 56, and 70 bar), and mixing rates (100, 200, and 300 rpm). The viscoelastic behavior was observed in most shut-in and restart tests. The experiments showed subcooling as an important parameter that affects hydrate morphology. Also, experiments varying the rotation speed showed that the apparent viscosity was unaffected by decreasing the rotation speed, suggesting that hydrate particle/aggregate size was unchanged. However, increasing the rotational speed resulted in a decrease of the apparent viscosity, in the case without an additive, or an increase in the apparent viscosity in the case with an antiagglomerant. Results using crude oil, antiagglomerant, and high water cut did not show viscoelastic behavior at shut-in and restart conditions. Both antiagglomerants formed hydrate dispersions, indicating that a flowable hydrate slurry had formed due to the antiagglomerant effect.

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“…The induction time was reduced by 96.6 %. Abdi-Khanghah et al [18] showed hydrate formation experiments on nano-zinc oxide with SDS, as well as their mixing. The results showed that the addition of SDS improved the stability of nanoparticles and shortened the induction period, but the final gas storage did not change significantly.…”

Section: Introductionmentioning

confidence: 99%

“…The induction time was reduced by 96.6 %. Abdi‐Khanghah et al [18] . showed hydrate formation experiments on nano‐zinc oxide with SDS, as well as their mixing.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Methane Hydrate Formation in the Presence of Silica Nanoparticles and Cetyltrimethylammonium Bromide

et al. 2022

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Hydrate technology promoted the development of natural gas industry. Nanoparticles showed a broad prospect for hydrate technology because of their excellent mass and heat transfer characteristics. At an experimental temperature of 275.15 K and pressure of 5 MPa, silica nanoparticles and cetyltrimethylammonium bromide (CTAB) were used to investigate the characteristics (pressure drop, gas storage capacity, and formation rate). The experimental results showed that the higher the concentration of silica nanofluid, the shorter the induction time. Among the four silica nanoparticles concentration (0.1, 0.2, 0.3, and 0.5 wt%) tested in this work, the concentration of 0.3 wt% was optimal for the enhancement of CH4 hydrate formation. In the complex system composed of silica nanoparticles and CTAB, the surface of silica nanoparticles was positively charged by hydrolysis. The cationic active groups ionized by surfactants were aggregated to the surface of the particles under the Coulomb force. Methane molecules were gathered to hydrophobic groups by non‐polar adsorption, which was more conducive to hydrate formation. Compared to silica nanofluid, the total time for hydrate formation decreased by 66.2 %.

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Methane hydrate formation in the presence of ZnO nanoparticle and SDS: Application to transportation and storage

Cited by 65 publications

References 25 publications

Magnesium-Promoted Rapid Nucleation of Carbon Dioxide Hydrates

Magnesium-Promoted Rapid Nucleation of Carbon Dioxide Hydrates

Measurements of Hydrate Formation Behavior in Shut-In and Restart Conditions

Kinetics of Methane Hydrate Formation in the Presence of Silica Nanoparticles and Cetyltrimethylammonium Bromide

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