Inhibition of methane hydrate nucleation and growth by an antifreeze protein

Mu, Liang; Ramløv, Hans; Søgaard, T. Max M.; Jørgensen, Tina; Jongh, Willem A. de; Solms, Nicolas von

doi:10.1016/j.petrol.2019.106388

Cited by 9 publications

(6 citation statements)

References 51 publications

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“…Therefore, the trends observed for the average T on for fresh and memory solutions at 30 and 36 bar are: [C 2 OHth][Br] < [C 2 th][Br] ≈ Milli-Q water and [C 2 th][Br] ≈ Milli-Q water < [C 2 OHth][Br], respectively. Similar behavior of hydrate nucleation in the presence of additives has been reported elsewhere [ 57 , 61 ].…”

Section: Resultssupporting

confidence: 86%

“…The constant ramping method is a well-perceived method in the literature [ 56 , 57 ] which has been used to obtain the nucleation onset temperatures to screen the efficiency of given kinetic hydrate inhibitors at low concentrations. The results of the nucleation (T on ) onset temperatures of CO 2 hydrates in solutions of 1 wt% ILs and Milli-Q water at two different pressures are given in Table 2 along with the standard deviations and plotted in Figure 4 (left).…”

Section: Resultsmentioning

confidence: 99%

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Effect of Thiouronium-Based Ionic Liquids on the Formation and Growth of CO2 (sI) and THF (sII) Hydrates

Soromenho¹,

Keba²,

Esperança³

et al. 2022

IJMS

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In this manuscript, two thiouronium-based ionic liquids (ILs), namely 2-ethylthiouronium bromide [C2th][Br] and 2-(hydroxyethyl)thiouronium bromide [C2OHth][Br], were tested at different concentrations (1 and 10 wt%) for their ability to affect CO2 (sI) and tetrahydrofuran (THF) (sII) hydrate formation and growth. Two different methods were selected to perform a thermodynamic and kinetic screening of the CO2 hydrates using a rocking cell apparatus: (i) an isochoric pressure search method to map the hydrate phase behavior and (ii) a constant ramping method to obtain the hydrate formation and dissociation onset temperatures. A THF hydrate crystal growth method was also used to determine the effectiveness of the ILs in altering the growth of type sII hydrates at atmospheric pressure. Hydrate–liquid–vapor equilibrium measurements revealed that both ILs act as thermodynamic inhibitors at 10 wt% and suppress the CO2 hydrate equilibria ~1.2 °C. The constant ramping methodology provides interesting results and reveals that [C2OHth][Br] suppresses the nucleation onset temperature and delays the decomposition onset temperatures of CO2 hydrates at 1 wt%, whereas suppression by [C2th][Br] was not statistically significant. Normalized pressure plots indicate that the presence of the ILs slowed down the growth as well as the decomposition rates of CO2 hydrates due to the lower quantity of hydrate formed in the presence of 1 wt% ILs. The ILs were also found to be effective in inhibiting the growth of type sII THF hydrates without affecting their morphology. Therefore, the studied thiouronium ILs can be used as potential dual-function hydrate inhibitors. This work also emphasizes the importance of the methods and conditions used to screen an additive for altering hydrate formation and growth.

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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Effect of Thiouronium-Based Ionic Liquids on the Formation and Growth of CO2 (sI) and THF (sII) Hydrates

Soromenho¹,

Keba²,

Esperança³

et al. 2022

IJMS

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“…A phenomenon recognized by many researchers as the water "memory effect", however, may cause natural gas hydrates to form easier after being dissociated or melted down [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. In these studies, the memory effect is observed as a shorter induction time during a constant subcooling or as a smaller subcooling phase during a linear cooling ramp.…”

Section: Introductionmentioning

confidence: 99%

Hydrate Formation with the Memory Effect Using Classical Nucleation Theory

Akkutlu,

Arslan,

Khan

2024

Crystals

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Methane hydrate formation is analytically studied in the presence of the water memory effect using the classical nucleation theory. The memory effect is introduced as a change in nucleation site from a three-dimensional heterogenous nucleation on a solid surface with cap-shaped hydrate clusters (3D-HEN) to a two-dimensional nucleation on the solid hydrate residue surface with monolayer disk-shaped hydrate clusters (2D-NOH). The analysis on the stationary nucleation of methane hydrate under isobaric conditions shows that the memory effect caused an average decrease of 4.4 K in metastable zone width, or subcooling. This decrease can be erased at higher dissociation temperatures (ΔT > 17.2 K) due to a decrease in the concentration of 2D-NOH nucleation sites. Moreover, the probability of hydrate formation is estimated for the purpose of quantifying risk associated with methane hydrate formation in the presence of the memory effect.

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“…By contrast, insect AFPs exhibit TH up to 5 °C and are, thus, classified as hyperactive. , Tenebrio molitor ( Tm )AFP, a biodegradable substance, has a high TH, which makes it an excellent ice-growth inhibitor. Although AFPs effectively inhibit hydrate growth, the precise mechanism through which this occurs requires further investigation. − Therefore, in this study, molecular dynamics (MD) simulations were employed to investigate the mechanism of the hyperactive insect antifreeze protein Tm AFP in inhibiting methane hydrate growth.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Hyperactive Antifreeze Protein on Inhibition of Gas-Hydrate Growth by Hydrophobic and Hydrophilic Groups

Zhang,

Du,

Yao

et al. 2023

J. Phys. Chem. B

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Inhibition of methane hydrate nucleation and growth by an antifreeze protein

Cited by 9 publications

References 51 publications

Effect of Thiouronium-Based Ionic Liquids on the Formation and Growth of CO2 (sI) and THF (sII) Hydrates

Effect of Thiouronium-Based Ionic Liquids on the Formation and Growth of CO2 (sI) and THF (sII) Hydrates

Hydrate Formation with the Memory Effect Using Classical Nucleation Theory

Synergistic Effect of Hyperactive Antifreeze Protein on Inhibition of Gas-Hydrate Growth by Hydrophobic and Hydrophilic Groups

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