Effect of CuO nanoparticle on dissolution of methane in water

Moraveji, Mostafa Keshavarz; Golkaram, Milad; Davarnejad, Reza

doi:10.1016/j.molliq.2012.12.014

Cited by 34 publications

(14 citation statements)

References 11 publications

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“…It should be noted that we detected no effect of powder addition on the solubility of natural gas in water. It does not agree with the recently published results [39]. After saturation of the aqueous phase with gas, the reactor with the stirrer was placed in the chamber of an air thermostat at 0.5°С ± 0.5°C for cooling and hydrate formation (Fig.…”

Section: Methodscontrasting

confidence: 59%

Promotion and inhibition of gas hydrate formation by oxide powders

Nesterov

Reshetnikov

Manakov

et al. 2015

Journal of Molecular Liquids

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Section: Methodscontrasting

confidence: 59%

Promotion and inhibition of gas hydrate formation by oxide powders

Nesterov

Reshetnikov

Manakov

et al. 2015

Journal of Molecular Liquids

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“…It was found that systems containing as-produced GNFs had enhanced methane dissolution rates compared to the water baseline: the first-order time constant decreased by up to 18.84%, a decrease of nearly one-fifth of the baseline value. This finding agrees with previous studies investigating the effects of nanoparticles on gas dissolution. ,− The main phenomena to which this observation is attributed are generally as follows: gas adsorption on the nanoparticle surface (shuttle or grazing effect), enhancement of the mass transfer coefficient, and an increase in the gas–liquid interfacial area. ,− The first has already been discussed, although it can be noted that Zhu et al (2008) strategically functionalized their silica nanoparticles with hydroxide groups to attract carbon monoxide gas, whereas it is suggested in this current study that the methane preferentially adsorbs to the GNF surface due to their shared hydrophobic nature . Nanoparticles also have high surface energies, and thus, there is a tendency to adsorb gases to decrease their overall Gibbs free energy and become more stable .…”

Section: Results and Discussionsupporting

confidence: 91%

Effects of Hydrophobic and Hydrophilic Graphene Nanoflakes on Methane Dissolution Rates in Water under Vapor–Liquid–Hydrate Equilibrium Conditions

McElligott

Meunier

Servio

2021

Ind. Eng. Chem. Res.

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Several industries have steadily gained interest in gas hydrate technologies for their potential use in natural gas transport and storage applications. Additives which optimize the efficiencies of these technologies, particularly nanoparticles, have lately been subject to an increasing investigative focus. Graphene nanoflakes (GNFs) have previously been proven to enhance hydrate systems, particularly methane hydrate systems. In this study, the dissolution rates of methane and molar saturation values were measured in nanofluids containing both hydrophobic (as-produced) and hydrophilic (plasma-functionalized) GNFs at 2 °C and 3146 kPa. For both types of GNFs, the effect of loading in the aqueous phase was equally determined. Dissolution rate enhancement was limited at low concentrations of around 0.5 ppm for hydrophobic GNFs due to small-scale agglomeration while significantly increasing dissolution kinetics by about 18.84% at concentrations of 5 ppm. The performance eventually decreased at higher concentrations (10 ppm) due to large-scale agglomeration. Hydrophilic GNFs, which exhibited no agglomeration, enhanced dissolution rates further with each successive loading until a 44.45% plateau at 10 ppm. This plateau may have been a limit of the system or a result of mean free path limitations. Either type of GNFs nearly triples the dissolution rates of methane investigated in previous studies on multi-walled carbon nanotubes due to their higher specific surface area.

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“…Moreover, compared with homogeneous nucleation, the addition of silica nanoparticles increased the inhomogeneity in hydrate formation system, thus promoting the heterogeneous nucleation of hydrate. Finally, the motion of nanoparticles reduced the film resistance at the gas‐liquid interface and enhanced the mass transfer effect, thus shortening the induction time [25] …”

Section: Effects Of Silica Nanofluid On Hydrate Formationmentioning

confidence: 99%

“…Finally, the motion of nanoparticles reduced the film resistance at the gas-liquid interface and enhanced the mass transfer effect, thus shortening the induction time. [25] An interesting phenomenon is that 0.1 wt% and 0.2 wt% concentrations have two induction times. For 0.1 wt% concentration, the first nucleate occurred at the end of the dissolution period.…”

Section: Effects Of Silica Nanofluid On Hydrate Formationmentioning

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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Effect of CuO nanoparticle on dissolution of methane in water

Cited by 34 publications

References 11 publications

Promotion and inhibition of gas hydrate formation by oxide powders

Promotion and inhibition of gas hydrate formation by oxide powders

Effects of Hydrophobic and Hydrophilic Graphene Nanoflakes on Methane Dissolution Rates in Water under Vapor–Liquid–Hydrate Equilibrium Conditions

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

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