Rheological investigation of methane hydrate formation with biodegradable emulsifiers as anti-agglomerants

Lee, Wonhee; Choi, Yong-Seok; Kim, Yeonggyu; Lim, Jong‐Se; Kang, Seong-Pil

doi:10.1016/j.petrol.2019.106454

Cited by 14 publications

(17 citation statements)

References 31 publications

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“…Liquid samples had 24 mL of a total volume, and their water cuts (volume of water per total liquid volume, or simply water contents (vol%) in mixed oil and water liquids) were set at 30% or 50%. Figure 1a shows an experimental diagram used to perform the kinetic inhibition tests for gas hydrate formation with the synthetic natural gas, which was similar to the one in our previous report [21,22]. First, water was dispersed or emulsified in the liquid phase by means of the mixing of a certain volume of light mineral oil and deionized water in the presence or absence of surfactants (0.5, 1.0 and 1.5 wt%) at 7500 rpm for 2.0 min with a T25 ULTRA-TURRAX homogenizer (IKA, Staufen, Germany).…”

Section: Methodsmentioning

confidence: 70%

“…The HPLC grade water and mineral oil (light reflective index of n20/D 1.467, density of 0.838 g/mL at 25 • C) were purchased from the Duksan Company (Republic of Korea) and Sigma-Aldrich, respectively. While the mineral oil and water can be dispersed with mixing, emulsions are prepared using surfactants, basically in the same way of our previous investigation [22]. Two biodegradable surfactant candidates from natural sources (lanolin and lecithin) and a third control group (Span 80) were used in this study.…”

Section: Methodsmentioning

confidence: 99%

“…First, water was dispersed or emulsified in the liquid phase by means of the mixing of a certain volume of light mineral oil and deionized water in the presence or absence of surfactants (0.5, 1.0 and 1.5 wt%) at 7500 rpm for 2.0 min with a T25 ULTRA-TURRAX homogenizer (IKA, Staufen, Germany). Then, the liquid phase with dispersed or emulsified water in oil was introduced into a Midiclave reactor (Büchiglasuster, Uster, Switzerland) in a steel pressure reactor with an internal volume of 1.0 L. This reactor was connected with a temperature controller and a circulating chiller (FP 88, Julabo, Seelbach, Germany) using an aqueous ethylene glycol solution [21,22]. A thermocouple, a pressure transducer and a torque magnetic drive were inserted into the reactor, whose accuracies were ±0.1 K, ±0.01 bar, and ±0.01 N·cm, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Because the AAs are generally not biodegradable, they can have a large environmental impact if they are released from the pipelines into the ocean. To resolve such environmental issues, a few biodegradable surfactants have been suggested as potential AAs, but they still do not have sufficient performance compared with conventional AAs [21][22][23]. Although low dosages of KHIs or AAs have recently been used to prevent hydrate formation, the materials used in the industry are toxic and accumulate in living things.…”

Section: Introductionmentioning

confidence: 99%

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Anti-Agglomeration Effects of Biodegradable Surfactants from Natural Sources on Natural Gas Hydrate Formation

Kang

Lee

2020

Energies

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Kinetic hydrate inhibitors (KHI) and anti-agglomerants (AA) rather than thermodynamic hydrate inhibitors (THI) are often used for flow assurance in pipelines. This is because they require much lower dosages than thermodynamic inhibitors. Although the hydrate-phase equilibria are not affected, KHI and AA prevent the formed hydrate crystals from growing to a bulky state causing pipeline blockage. However, these KHIs might have huge environmental impact due to leakages from the pipelines. In this study, two biodegradable AA candidates from natural sources (that is, lecithin and lanolin) are proposed and their performances are evaluated by comparing them with and without a conventional AA (Span 80, sorbitan monooleate). At 30% and 50% water cut, the addition of AA materials was found to enhance the flow characteristics substantially in pipelines and hardly affected the maximum value of the rotational torque, respectively. Considering the cost-effective and environmental advantages of the suggested AA candidates over a conventional AA such as Span 80, the materials are thought to have potential viability for practical operation of oil and gas pipelines. However, additional investigations will be done to clarify the optimum amounts and the action mechanisms of the suggested AAs.

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Section: Methodsmentioning

confidence: 70%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Anti-Agglomeration Effects of Biodegradable Surfactants from Natural Sources on Natural Gas Hydrate Formation

Kang

Lee

2020

Energies

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“…The type of rheometer geometry adversely affects hydrate based rheology studies, especially in the case of a smooth Couette bob measuring geometry. , Thus, authors often modify the smooth Couette bob geometry by making its surface rough to help form hydrates. In this work, we used measuring system using the vane-type rotor and cup geometry as used by Lee et al . and Karanjkar et al, as shown in Figure .…”

Section: Experimental Sectionmentioning

confidence: 99%

Investigating the Potential Cuttings Transport Behavior of Ionic Liquids in Drilling Mud in the Presence of sII Hydrates

Bavoh

Ofei

2020

Energy Fuels

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Water-based mud used for drilling hydrate sediments is often challenged with hydrate related wellbore instability and geohazards. Ionic liquids are believed to improve the rheological and hydrate management properties of water-based mud for drilling hydrate sediments. However, the effect of hydrates and ionic liquids of the viscoelastic properties of polymer water-based mud is not well understood in gas hydrate sediment drilling operation. In this study, the amplitude sweep, frequency sweep and flow curves of tetrahydrofuran hydrate and four imidazolium ionic liquids in polymer water-based mud system were evaluated at 271.15 K using a vane geometry in a Discovery HR-1 rheometer. The ionic liquids in this study were chosen to allow a clear understanding of their alkyl chain length and anion effect and were tested at 1 wt %. The studied ionic liquids are 1-ethyl-3-methylimidazolium chloride [C2 mim][Cl], 1-butyl-3-methylimidazolium chloride [C4 mim][Cl], 1-butyl-3-methylimidazolium tetrafluoroborate [C4 mim][BF4], and 1-hexyl-3-methylimidazolium chloride [C6 mim][Cl]. The study revealed that the storage modulus (G′) and loss modulus (G″) of the polymer water-based mud were reduced in the presence of tetrahydrofuran hydrate, while its viscoelastic range was increased from 13% to 25%, due to the solid nature of hydrate present in the mud. Generally, the presence of ionic liquids in the base mud (without THF) negligibly affected the viscoelastic properties of the base mud. However, the presence of hydrates affected the viscoelastic properties of the base mud and ionic liquid systems by changing its responses a fast deformation from elastic dominance to viscous at high frequencies (>50 rad/s). Ionic liquids with longer alkyl chains ([C4 mim][Cl] and [C6 mim][Cl]) best inhibited tetrahydrofuran hydrate formation in the mud and provided suitable viscoelastic and hydraulics properties for drilling fluids. [C2 mim][Cl] and [C4 mim][BF4] promoted hydrate formation and provided minimal drilling hydraulics properties of the THF water-based mud slurry. The presence of ionic liquids in the tetrahydrofuran hydrate mud slurry increased the consistency index and decreased the yield stress, flow index and YP/PV index of the THF water-based mud slurry suitable for ensuring the safe transportation of hydrate crystals and drill cutting out of the wellbore.

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Study on fluidizing the highly converted methane hydrate for gas storage and transportation

Xiao

Zhang

et al. 2022

Chemical Engineering Journal

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Rheological investigation of methane hydrate formation with biodegradable emulsifiers as anti-agglomerants

Cited by 14 publications

References 31 publications

Anti-Agglomeration Effects of Biodegradable Surfactants from Natural Sources on Natural Gas Hydrate Formation

Anti-Agglomeration Effects of Biodegradable Surfactants from Natural Sources on Natural Gas Hydrate Formation

Investigating the Potential Cuttings Transport Behavior of Ionic Liquids in Drilling Mud in the Presence of sII Hydrates

Study on fluidizing the highly converted methane hydrate for gas storage and transportation

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