Use of 1-butyl-3-methylimidazolium-based ionic liquids as methane hydrate inhibitors at high pressure conditions

Menezes, Davi Éber Sánches de; Filho, Pedro de Alcântara Pessôa; Fuentes, María Dolores Robustillo

doi:10.1016/j.ces.2019.115323

Cited by 15 publications

(9 citation statements)

References 68 publications

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“…On the other hand, a five-membered ring was found at the opposite side of a six membered ring in the methane gas hydrate clathrate cavity of SI. The specific evolutio process from 5 13 6 1 to 5 12 6 2 is recorded in Figure 10. The incompleteness of a large cage structure was mainly performed in two aspects.…”

Section: Evolution Of Hydrate Incomplete Cage With Emim-clmentioning

confidence: 99%

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Inhibition Mechanism of EMIM-Cl to Methane Gas Hydrate by Molecular Dynamics Simulation

Xin

Xu²,

Li³

et al. 2022

Energies

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Deep-water gas well testing is a key technology for obtaining reservoir production and physical property parameters. However, gas hydrates could easily form and cause blockage in the low-temperature and high-pressure environment on the seafloor. Therefore, it is extremely important to inhibit hydrate growth in deep-water operations. Ionic liquid is a type of hydrate inhibitor with both thermodynamic and kinetic effects. However, its intrinsic inhibiting mechanism is still unclear. By using molecular dynamics simulation, the growth process of methane hydrate in the 1-ethyl-3-methylimidazole chloride (EMIM-Cl)-containing system at the pressure of 15 MPa and temperature of 273.15 K was studied. The system energy and angular order parameters (AOP) were extracted as the evaluation indicators. It was found that the time for the complete growth of methane hydrate in the EMIM-Cl-containing system was about 10 ns, longer than that in the pure water, indicating that EMIM-Cl showed an obvious inhibition effect to hydrate growth. The results also implied that the joint action of hydrogen bond and steric hindrance might be the inhibition mechanism of EMIM-Cl. Some six-membered rings in hydrate crystal large cage structures evolved from five-membered rings under the effect of EMIM, which partly contributed to the delay of hydrate formation.

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Section: Evolution Of Hydrate Incomplete Cage With Emim-clmentioning

confidence: 99%

“…In addition, amino acid-based ionic liquids can be used as a thermodynamic (THI) and kinetic (KHI) hydrate inhibitor. Menezes [12] studied the 1-butyl-3-methylimidazolium-based ionic liquids inhibiting gas hydrates under different concentrations with an experimental pressure as high as 100 MPa. It is found that…”

Section: Introductionmentioning

confidence: 99%

Inhibition Mechanism of EMIM-Cl to Methane Gas Hydrate by Molecular Dynamics Simulation

Xin

Xu²,

Li³

et al. 2022

Energies

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“…The types of IL cations and anions tested for their thermodynamic hydrate inhibition potentials are shown in Figure . A total of about six cationic groups, namely, n -alkyl- n -imidazolium, − n -alkyl-n-ammonium, − choline, n -alkyl- n -pyrrolidinium, n -alkyl- n -piperidinium, and n -alkyl- n -morpholinium have been used for hydrate mitigation testing systems. The n -alkyl- n -imidazolium group is the commonly tested IL family in the literature for hydrate inhibition-related studies.…”

Section: Gas Hydrate Mitigation Using Ionic Liquidsmentioning

confidence: 99%

Ionic Liquids as Gas Hydrate Thermodynamic Inhibitors

Bavoh

Nashed

Rehman

et al. 2021

Ind. Eng. Chem. Res.

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Ionis liquids (ILs) are promising novel thermodynamic gas hydrate inhibitors (THIs) that have gained an ongoing experimental and modeling research prospect over a decade. In view of this, the path to developing desirable ionic liquids THIs depends on understanding the state-of-the-art methods of ILs hydrate inhibition impacts and factors that influence their performance. This review provides a holistic summary of the use of ILs as THIs. Almost all the available thermodynamic hydrate inhibition data of different gas systems in the presence of ILs at varying concentrations were critically reviewed and analyzed. Also, all ILs hydrate-related phase behavior modeling studies and their prediction accuracies are discussed in this work. The hydrate phase boundary inhibition effects of each IL are provided alongside factors that affect their inhibition performance. The study showed that IL cations, anions, and chain length characteristics control their hydrate inhibition impacts. By far, a narrow hydrate suppression temperature window below 3 K at 10 wt % IL concentration has been achieved with accurate predictions using various models. This narrow THI performance window could be enhanced by exploring novel IL families with low molecular weights, well-optimized cation–anion interactions, and active hydrogen bonding interactive functionalities. The findings presented in this work are relevant for future IL-related breakthrough research in hydrate inhibition technologies.

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“…The conditions of gas hydrate solids occurrence is majorly governed by either its thermodynamic equilibrium or nucleation/growth rate. Chemical injection by adding the thermodynamic hydrate inhibitors (THIs) like methanol and mono-ethylene glycol (MEG) [5] or low-dosage hydrate inhibitors (LDHIs) such as kinetic hydrate inhibitors (KHIs) and anti-agglomerants (AAs) [11] is a common approach to either shift the equilibrium curve or delay the nucleation rate [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Review on Application of Quaternary Ammonium Salts for Gas Hydrate Inhibition

Hussain

Husin

2020

Applied Sciences

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Gas hydrate solids occurrence is considered as one of the serious challenges in flow assurance as it affects the hydrocarbon production significantly, especially in deep water gas fields. The most cost-effective method to inhibit the formation of hydrate in pipelines is by injecting a hydrate inhibitor agent. Continuous studies have led to a comprehensive understanding on the use of low dosage hydrate inhibitors such as ionic liquid and quaternary ammonium salts which are also known as dual function gas hydrate inhibitors. This paper covers the latest types of quaternary ammonium salts (2020–2016) and a summary of findings which are essential for future studies. Reviews on the effects of length of ionic liquids alkyl chain, average suppression temperatures, hydrate dissociation enthalpies, and electrical conductivity to the effectiveness of the quaternary ammonium salts as gas hydrate inhibitors are included.

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Use of 1-butyl-3-methylimidazolium-based ionic liquids as methane hydrate inhibitors at high pressure conditions

Cited by 15 publications

References 68 publications

Inhibition Mechanism of EMIM-Cl to Methane Gas Hydrate by Molecular Dynamics Simulation

Inhibition Mechanism of EMIM-Cl to Methane Gas Hydrate by Molecular Dynamics Simulation

Ionic Liquids as Gas Hydrate Thermodynamic Inhibitors

Review on Application of Quaternary Ammonium Salts for Gas Hydrate Inhibition

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