Experimental study and thermodynamic modeling of CO 2 gas hydrate formation in presence of zinc oxide nanoparticles

Mohammadi, Mohsen; Haghtalab, Ali; Fakhroueian, Zahra

doi:10.1016/j.jct.2015.12.015

Cited by 93 publications

(38 citation statements)

References 45 publications

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“…The amounts of enhancement of the gas consumption for ZnO nanofluids were about 6-16% at different pressures. [28]. The effect of different concentrations of Al 2 O 3 /ZnO nanoparticles in aqueous solution on the CH 4 + C 2 H 6 + C 3 H 8 hydrate formation kinetics were investigated and the gas consumption in the presence of these two types of nanoparticles increased by almost 121% in comparison with that of a pure water system.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide: An Effective Promoter for CO2 Hydrate Formation

et al. 2018

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The main difficulties in applying technologies based on hydrate formation are the slow hydrate formation rate, low storage capacity, severe formation conditions and environmentally devastating promoters. Nano-sized graphene oxide has special microstructure features such as its functional groups and a large specific surface area, which can lead to high heat and mass transfer efficiency, large gas dissolution, fast nucleation and formation rate. In this work, CO 2 hydrate formation with and without graphene oxide nanoparticles was investigated. Herein, the promoting mechanism and effects of graphene oxide concentrations in different initial pressures ranging from 3 to 5 MPa at 279 K on CO 2 hydrate formation process were studied experimentally. The experimental results showed that graphene oxide can shorten the induction time by 53-74.3% and increase the gas consumption up to 5.1-15.9% under different system pressures. Based on the results, the optimum concentration was ascertained as 50 ppm under which condition, the induction time and the reaction time were the shortest while the pressure drop and the gas consumption reached the maximum.

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Section: Introductionmentioning

confidence: 99%

Graphene Oxide: An Effective Promoter for CO2 Hydrate Formation

et al. 2018

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“…10 In research, the key scientic problems in the hydrate method of separation of gas mixtures are how to speed up the rate of hydrate separation, increase the gas storage capacity of hydrates, and improve the rate of recovery of methane to increase the selectivity of separation. 11 As a result, in order to improve the performance of hydrate separation of gas mixtures, some researchers have proposed a variety of methods, such as the addition of a promoter (SDS, 12 THF, 13 TBAB, 14 or TBAF 15 ) or porous materials (silica, 16 carbon nanotubes, 17 activated carbon, 18 nanoparticles, 19 dry gels, 20 foams, 21 hydrogels, 22 or polymers 23 ), mechanical stirring (bubbling, 24 stirring, 25 or spraying 26 ) and changing the thermodynamic conditions (increasing the pressure 27 or lowering the temperature 28 ). In the above studies, some researchers have also compared different methods of promoting hydrate formation.…”

Section: Introductionmentioning

confidence: 99%

Effect of dry water on methane separation and recovery from coal mine gas based on hydrate

Zhang

et al. 2018

RSC Adv.

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“…In addition, the hydrate reaction was 98.8% complete within 400 min in the presence of nanographite particles. Mohammadi et al (2016) studied the effect of synthesized zinc oxide (ZnO) nanoparticles on the kinetic and thermodynamic equilibrium conditions of CO 2 hydrate formation. The amount of the gas consumption was measured and compared for the four sample fluids: pure water, aqueous solution of sodium dodecyl sulfate (SDS), water-based ZnO nanofluid and water-based ZnO nanofluid in the presence of SDS (0.001 mass fraction).…”

Section: Introductionmentioning

confidence: 99%

A study on the influence of nanofluids on gas hydrate formation kinetics and their potential: Application to the CO 2 capture process

Said

Govindaraj

Herri

et al. 2016

Journal of Natural Gas Science and Engineering

107

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In this work, the effects of Al 2 O 3 , SiO 2 , Ag and Cu nanoparticles on the kinetics of CO 2-CH 4 hydrate formation process were experimentally studied by measuring the amount of gas consumed and the rate of gas consumption. A suspension of 0.1wt%, 0.2wt % and 0.3wt% of each nanoparticle was injected into the hydrate formation reactor, while pressure and temperature were maintained at 4.0 MPa and 274.15 K, and the magnetic stirrer speed was set at 350 rpm. The CO-CH 4 hydrate formation process was studied in both pure water and water containing a 0.1wt%, 0.2wt% and 0.3wt% of each nanoparticle suspension. The results showed that these nanoparticles had a positive effect on hydrate formation. These effects varied from one nanoparticle to another. It was observed that nanoparticles of SiO 2 had the most positive effect on CO 2 gas consumption, particularly at a concentration of 0.3wt%. At this concentration the average amount of gas consumed was about 45% higher than that in pure water during the dissolution and 77% during crystallization. Cu and Al 2 O 3 nanoparticles had an intermediate effect with improvement in gas consumption by 1% to 15% during dissolution; while it had an important impact on gas consumption during hydrate crystallization with an improvement of 30% to 65%. Ag nanoparticles had no significant effect during these two phases.

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Experimental study and thermodynamic modeling of CO 2 gas hydrate formation in presence of zinc oxide nanoparticles

Cited by 93 publications

References 45 publications

Graphene Oxide: An Effective Promoter for CO2 Hydrate Formation

Graphene Oxide: An Effective Promoter for CO2 Hydrate Formation

Effect of dry water on methane separation and recovery from coal mine gas based on hydrate

A study on the influence of nanofluids on gas hydrate formation kinetics and their potential: Application to the CO 2 capture process

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