The effects of rhamnolipid on the formation of CH4 hydrate and separation of CH4/N2 via hydrate formation

Zhang, Yi; Zhang, Jingru; Xu, Xingang; Liu, Wanting; Xu, Yongsheng; Yang, Mingjun; Song, Yongchen

doi:10.1016/j.fuel.2023.129873

Cited by 3 publications

(4 citation statements)

References 30 publications

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“…Ndlovu et al 18 observed that graphene nanoplatelets improved CH 4 gas conversion into CH 4 gas hydrate by over 100% when applied in gas hydrate formation. Zhang et al 19 utilized rhamnolipid, a green surfactant, to promote the formation of CH 4 gas hydrate at varying concentrations, ranging from 0 to 800 ppm. It was noted that the consumption of gas increased as the concentration of rhamnolipid increased, and the interfacial tension was noted to be a significant factor in increasing the rate of hydrate formation.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Nanoparticles to Improve the Kinetics of CH₄ Gas Hydrates in Gas Storage Applications

Ndlovu,

Babaee,

Naidoo

et al. 2024

Energy Fuels

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Increasing energy demands have opened research channels into alternate areas to explore viable options for energy storage. This has led to investigations into the use of gas hydrate technology, specifically derived from methane gas, for diverse energy applications, such as gas storage and gas transportation. In this study, the kinetics of CH 4 hydrate formation in (0.1, 0.2, 0.5, 1.0, and 1.2 wt %) CuO and Al 2 O 3 nanoparticles, graphene nanoplatelets, and ZnO microparticles in the presence of 0.05 wt % sodium dodecyl sulfate (SDS) were measured experimentally. The experimental measurements were conducted in a 52 cm 3 equilibrium cell at a pressure of 4.66 MPa and a temperature of 275.8 K. The kinetic parameters under investigation included the induction time, storage capacity, water conversion, rate of gas uptake, and gas consumption. Results show that the inclusion of nanoparticles in the experiments decreased the induction time from 18.4 min with deionized water to 1.0 min with 0.1 wt % CuO + 0.05 wt % SDS while the induction period increased to 20.7 min with 1.2 wt % ZnO + 0.05 wt % SDS microparticles. A maximum storage capacity of 28.5 (v/v) was obtained using 0.1 wt % CuO + 0.05 wt % SDS. The highest gas uptake rate recorded was 8.9 × 10 −4 mol gasmol water −1 min −1 , achieved with the combination of 0.5 wt % CuO + 0.05 wt % SDS. Overall, the parameters investigated in this study indicated a significant enhancement in the rate of hydrate formation with the inclusion of nanoparticles.

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Section: Introductionmentioning

confidence: 99%

Utilization of Nanoparticles to Improve the Kinetics of CH₄ Gas Hydrates in Gas Storage Applications

Ndlovu,

Babaee,

Naidoo

et al. 2024

Energy Fuels

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“…15 Temperature and pressure are key parameters that directly affect the driving force for hydrate formation. 16 First, Gajanayake et al changed the confining pressure to synthesize core samples with different hydrate saturation. 12 It was found that the higher the confining pressure around the hydrate reservoir, the higher the hydrate saturation, which was the same as the field exploration data.…”

Section: Introductionmentioning

confidence: 99%

“…The main factors affecting hydrate saturation are parameters such as temperature, gas pressure, , confining pressure, , gas–water contact area, and ion concentration . Temperature and pressure are key parameters that directly affect the driving force for hydrate formation . First, Gajanayake et al changed the confining pressure to synthesize core samples with different hydrate saturation .…”

Section: Introductionmentioning

confidence: 99%

Experimental Measurements and Empirical Relationships on Permeability Evolutions of Water/Hydrate-Containing Muddy Reservoirs

Gong,

Zheng,

et al. 2024

Energy Fuels

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Marine hydrate reservoirs are an important form of natural gas, and investigating the permeability of hydrate reservoirs is of great significance for their development. During hydrate exploitation, both water saturation and hydrate saturation dynamically change, inducing a complicated variation in the permeability of hydrate reservoirs. Previous studies lacked specific conclusions on the effects of multiphase saturations on permeability in muddy hydrate-bearing reservoirs. This study remolded 9 cores with different water moisture values (0−14.5%) within a core holder using South Sea Clay and controlled water conversion (0− 61.1%) and hydrate saturations (8.63−42.16%) by the temperature agitation method. Based on Darcy's law, the permeabilities of water/hydrate-containing muddy reservoirs under different saturations were measured. It is found that the permeability decreases with the increase in both hydrate and water saturations, and the dynamic permeability of muddy cores with water conversion to hydrate is K = 40.71•e −41.26•w − (1.65−12.12•w)•χ. By inferring the increase in hydrate saturation at the same decrease in permeability, the ratio of hydrate and water saturations inducing an equivalent change in permeability is found as 1.18. The relationship between the permeability of muddy cores and contained hydrate and water saturations is established as K = 18.1•((1− 1.18•S h − S w )/(1 + 2•(1.18•S h + S w ))) 2.5 . This study is important for the dynamic prediction of the hydrate exploitation process.

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“…Bhattacharjee et al [47] analyzed the effect of surfactin (contained in a cell-free supernatant) on the methane hydrate formation at 50 bar and 274.15 K. The results proved an enhancement in the kinetics, assuming a promotion activity whose values were comparable against the appliance of sodium dodecyl sulfate. Finally, Zhang et al [48] analyzed the possible separation of methane and nitrogen via hydrates using rhamnolipids in the intervals of 274.15-276.15 K and 50-70 bar. A favorable separation factor was attained in the range of 200 to 800 ppm as a function of the methane-nitrogen separation effect.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Temperature on the Methane Hydrates Formation Process Using Sodium Surfactin and Rhamnolipids

Pavón-García,

Zúñiga-Moreno,

García-Morales

et al. 2023

Energies

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The performance of chemical and biological additives in the methane hydrates formation and dissociation processes is of relevance for the development of gas-transport and gas-storage systems. The effect of sodium surfactin, rhamnolipids, and sodium dodecyl sulfate (SDS) on the methane hydrate formation process was assessed in this work at different temperatures and a fixed pressure of 50 bar. The studied parameters were induction time, methane uptake, period to reach 90 percent of the consumed gas, water-to-hydrate conversion, and formation rate. Concentrations for sodium surfactin were 3, 150, 750, 1500, 2000, and 2500 ppm, while rhamnolipids and SDS solutions were analyzed at 1500, 2000, and 2500 ppm. Performance testing of these additives was carried out by means of the isochoric–isothermal method. The experimental setup consisted of an isochoric three-cell array with 300 mL of capacity and magnetic stirring. According to the results, the sodium surfactin promoted the methane hydrate formation since the kinetics were higher and the water-to-hydrate conversion averaged 24.3%; meanwhile, the gas uptake increased as concentration was rising, and the induction time was reduced even at a temperature of 276.15 K.

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The effects of rhamnolipid on the formation of CH4 hydrate and separation of CH4/N2 via hydrate formation

Cited by 3 publications

References 30 publications

Utilization of Nanoparticles to Improve the Kinetics of CH₄ Gas Hydrates in Gas Storage Applications

Utilization of Nanoparticles to Improve the Kinetics of CH₄ Gas Hydrates in Gas Storage Applications

Experimental Measurements and Empirical Relationships on Permeability Evolutions of Water/Hydrate-Containing Muddy Reservoirs

Evaluation of Temperature on the Methane Hydrates Formation Process Using Sodium Surfactin and Rhamnolipids

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The effects of rhamnolipid on the formation of CH4 hydrate and separation of CH4/N2 via hydrate formation

Cited by 3 publications

References 30 publications

Utilization of Nanoparticles to Improve the Kinetics of CH4 Gas Hydrates in Gas Storage Applications

Utilization of Nanoparticles to Improve the Kinetics of CH4 Gas Hydrates in Gas Storage Applications

Experimental Measurements and Empirical Relationships on Permeability Evolutions of Water/Hydrate-Containing Muddy Reservoirs

Evaluation of Temperature on the Methane Hydrates Formation Process Using Sodium Surfactin and Rhamnolipids

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Utilization of Nanoparticles to Improve the Kinetics of CH₄ Gas Hydrates in Gas Storage Applications

Utilization of Nanoparticles to Improve the Kinetics of CH₄ Gas Hydrates in Gas Storage Applications