Study on a carbon dioxide hydrate power generation system employing an unstirred reactor with cyclopentane

Kawai, Masahito; Obara, Shin’ya

doi:10.1016/j.energy.2021.120822

Cited by 4 publications

(1 citation statement)

References 22 publications

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“…These additives are employed to modify phase equilibrium conditions, thereby facilitating the formation of the CO 2 hydrate. Among the chemical additives, tetrabutylammonium bromide (TBAB), − tetrahydrofuran (THF), − cyclopentane (CP), − and sodium dodecyl sulfate (SDS) − have received considerable attention. Zhou et al investigated the effect of varying TBAB concentrations on CO 2 hydrate formation at 275.2 K and 3.0 MPa.…”

Section: Introductionmentioning

confidence: 99%

Rapid Nucleation and Formation of CO₂ Hydrate Triggered and Synergized by Tetrafluoroethane: A Kick-Start Effect

Cheng,

Lin,

Song

et al. 2024

Energy Fuels

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The application of hydrate-based technology is restricted by challenges such as high phase equilibrium pressure, long induction time, and slow formation rate, which could be overcome by different promoters. Compared to traditional accelerators such as tetrabutylammonium bromide (TBAB), 1,1,1,2-tetrafluoroethane (R134a) is an effective gas promoter in lower phase equilibrium conditions and easy to separate. The paper proposed a method to trigger and synergize CO 2 hydrate rapid nucleation and formation by controlling the trace (3 wt %) of R134a. The effect of different CO 2 partial pressures on the induction time, gas consumption, and growth pattern of the CO 2 hydrate was investigated. The effect of different R134a and CO 2 injection intervals (τ) on the triggering and synergizing of rapid CO 2 hydrate nucleation was also studied. The results indicated that the induction time of the CO 2 hydrate was reduced to approximately 97.4% of the original duration with the addition of the R134a gas promoter. At a CO 2 partial pressure of 2.8 MPa, the gas consumption of the CO 2 hydrate reached 0.34 mol, which increased by 47.8% compared to 2.4 MPa. Notably, the induction time of the CO 2 hydrate was reduced to 4.5 min when the injection interval (τ) was 30 min. Through an injection interval, R134a acts as a "kick-start" to trigger and synergize the rapid nucleation and formation of CO 2 hydrate. This study showed that the injection interval facilitated the first form of the R134a hydrate clusters, providing more nucleation sites and the CO 2 molecules' enclathration into the R134a hydrate cluster to form R134a-CO 2 hydrate, which further triggers and synergizes the rapid nucleation and formation of CO 2 hydrate. Finally, the mechanism of triggering and synergizing rapid nucleation and formation of CO 2 by R134a was explained with visual observations and theoretical model diagrams.

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Section: Introductionmentioning

confidence: 99%

Rapid Nucleation and Formation of CO₂ Hydrate Triggered and Synergized by Tetrafluoroethane: A Kick-Start Effect

Cheng,

Lin,

Song

et al. 2024

Energy Fuels

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Capacity planning of storage batteries for remote island microgrids with physical energy storage with CO2 phase changes

Obara

2024

Journal of Energy Storage

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Progress in CO2 hydrate formation and feasibility analysis for cold thermal energy harvesting application

Park,

Lee

et al. 2023

Renewable and Sustainable Energy Reviews

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Study on a carbon dioxide hydrate power generation system employing an unstirred reactor with cyclopentane

Cited by 4 publications

References 22 publications

Rapid Nucleation and Formation of CO₂ Hydrate Triggered and Synergized by Tetrafluoroethane: A Kick-Start Effect

Rapid Nucleation and Formation of CO₂ Hydrate Triggered and Synergized by Tetrafluoroethane: A Kick-Start Effect

Capacity planning of storage batteries for remote island microgrids with physical energy storage with CO2 phase changes

Progress in CO2 hydrate formation and feasibility analysis for cold thermal energy harvesting application

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Study on a carbon dioxide hydrate power generation system employing an unstirred reactor with cyclopentane

Cited by 4 publications

References 22 publications

Rapid Nucleation and Formation of CO2 Hydrate Triggered and Synergized by Tetrafluoroethane: A Kick-Start Effect

Rapid Nucleation and Formation of CO2 Hydrate Triggered and Synergized by Tetrafluoroethane: A Kick-Start Effect

Capacity planning of storage batteries for remote island microgrids with physical energy storage with CO2 phase changes

Progress in CO2 hydrate formation and feasibility analysis for cold thermal energy harvesting application

Contact Info

Product

Resources

About

Rapid Nucleation and Formation of CO₂ Hydrate Triggered and Synergized by Tetrafluoroethane: A Kick-Start Effect

Rapid Nucleation and Formation of CO₂ Hydrate Triggered and Synergized by Tetrafluoroethane: A Kick-Start Effect