Ionic Liquids as Gas Hydrate Thermodynamic Inhibitors

Bavoh, Cornelius B.; Nashed, Omar; Rehman, Amirun Nissa; Othaman, Nurul Akmal Aqidah Binti; Sabil, Khalik M.

doi:10.1021/acs.iecr.1c01401

Cited by 25 publications

(19 citation statements)

References 82 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The isochoric temperature search method or the T-cycle method is used in most research groups to obtain the hydrate dissociation/stability curve, i.e., the hydrate aqueous liquid–vapor equilibrium (HLVE). 65 This method will first charge the reactor with an aqueous solution with or without a thermodynamic inhibitor. After injecting the gas at the experimental pressure, the system is left to saturate the solution with a gas.…”

Section: Evaluation Methods For This and Khismentioning

confidence: 99%

Gas Hydrate in Oil-Dominant Systems: A Review

et al. 2022

Self Cite

View full text Add to dashboard Cite

Gas hydrate risks minimization in deepsea hydrocarbon flowlines, especially in high water to oil ratios, and is critical for the oil and gas flow assurance industry. Although there are several reviews on gas hydrate mitigation in gas-dominated systems, limited reviews have been dedicated to the understanding and mechanism of hydrate formation and mitigation in oil-dominated systems. Hence, this review article discusses and summarizes the prior studies on the hydrate formation behavior and mitigation in oil-dominated multiphase systems. The factors (such as oil volume or water cut, bubble point, and hydrate formers) that affect hydrate formation in oil systems are also discussed in detail. Furthermore, insight into the hydrate mitigation and mechanism in oil systems is also presented in this review. Also, a detailed table on the various studied hydrate tests in oil systems, including the experimental methods, inhibitor type, conventions, and testing conditions, is provided in this work. The findings presented in this work are relevant for developing the best solution to manage hydrate formation in oil-dominated systems for the oil and gas industry.

show abstract

Section: Evaluation Methods For This and Khismentioning

confidence: 99%

Gas Hydrate in Oil-Dominant Systems: A Review

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…The addition of a hydroxyl group did not enhance the thermodynamic performance of the studied ILs. However, these results are not surprising since ILs are known for their mild thermodynamic hydrate inhibitory effects and provide shifts typically in the range of 1–3 °C for the equilibrium temperatures [ 31 , 32 , 33 ] ( Figure S1 ).…”

Section: Resultsmentioning

confidence: 94%

“…The enthalpy of hydrate dissociation in the presence of ILs can be obtained by using the HLVE data points ( Table 1 ) and the Clausius–Clapeyron equation as:

where P , T , Δ H d , z, and R are pressure, temperature, dissociation enthalpy, compressibility factor, and gas constant, respectively. The compressibility factor was calculated using the Peng–Robinson equation of state at each set of dissociation conditions presented in Table 1 [ 32 ].…”

Section: Resultsmentioning

confidence: 99%

“…ILs, due to their designer nature, have the ability to fill this gap. The effect of ILs on CO 2 hydrate formation and growth is relatively less explored compared to CH 4 hydrates [ 31 , 32 , 33 ]. For instance, Makino et al studied the effect of imidazolium-based ILs on CO 2 hydrate phase behavior [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

“…These ILs have never been used for this purpose. Unlike the cyclic aromatic and non-aromatic ILs tested so far for hydrate inhibition/promotion [ 31 , 32 , 33 ], thiouronium cation-based ILs have a planar, charge-delocalized acyclic core ( Figure 1 ). These ILs are relatively inexpensive, easy to synthesize and are generally used for metal extraction, peptide coupling, electroplating bath additives, stabilizers for vulcanized rubber, etc.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

View full text Add to dashboard Cite

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.

show abstract

Omniphobic/superhydrophobic surface effect on oil and gas flow: A critical review

Hasan,

Sun,

Bahaeddine

et al. 2024

Can J Chem Eng

View full text Add to dashboard Cite

Flow assurance in the petroleum business of the oil and gas industry ensures the efficient and continuous flow of hydrocarbons from production facilities to consumers. Impurities in oil and gas can cause corrosion and erosion, hydrate formation, scaling, and fouling, resulting in flow limits and reduced operating efficiency. The significant flow assurance issues must be managed through systematic exploration of effective mitigation and management approaches. The objective of this paper is to highlight the latest research in the field of flow assurance, including the application of superhydrophobic or omniphobic coatings to prevent scale growth, asphaltene precipitation, wax deposition, and hydrate formation. This review will provide new perspectives into the basic mechanistic mechanisms of deposition and blockage in oil and gas production systems, assisting in the development of novel methods compared to the employment of commercial chemical or mechanical techniques. Overall, the flow assurance engineers will gain new perspectives from this study regarding how to deal with the risk of pipeline blockage caused by the problems mentioned earlier.

show abstract

Ionic Liquids as Gas Hydrate Thermodynamic Inhibitors

Cited by 25 publications

References 82 publications

Gas Hydrate in Oil-Dominant Systems: A Review

Gas Hydrate in Oil-Dominant Systems: A Review

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

Omniphobic/superhydrophobic surface effect on oil and gas flow: A critical review

Contact Info

Product

Resources

About