Evaluation of the Inhibition Efficiency of Plant Extract PE as Gas Hydrate Inhibitor in a Simulated Offshore Environment

Elechi, Virtue Urunwo; Ikiensikimama, Sunday Sunday; Ajienka, J.A.; Akaranta, Onyewuchi; Onyekonwu, Mike; Okon, Okon Efiong

doi:10.2118/198781-ms

Cited by 8 publications

(5 citation statements)

References 23 publications

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“…Similarly, Elechi et al reported the inhibitory effect of a medicinal plant extract named Costaceae, which contains a wide variety of bioactive compounds like phenols and alkaloids, flavonoids, tannins, and saponins. These compounds could be responsible for assisting the hydrate formation at lower temperatures . Similarly, all three bioadditives constitute several bioactive compounds.…”

Section: Resultsmentioning

confidence: 99%

“…These compounds could be responsible for assisting the hydrate formation at lower temperatures. 42 Similarly, all three bioadditives constitute several bioactive compounds. The neem leaf extracts may contain triterpenoids, alkaloids, phenolic compounds, flavonoids, carotenoids, ketones, and steroids.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Cactaceae extract, a medicinal plant available across the tropics of Asia, Africa, and America, is used in 1–3 wt % as a sample solution. The bioextracts show higher inhibition efficiency than conventional monoethylene glycol . Tang et al studied various green inhibitors and concluded that amino acids, antifreeze proteins, and ionic liquids, at lower concentrations, are effective kinetic inhibitors, and ionic liquids at higher concentrations can be used as prominent thermodynamic inhibitors .…”

Section: Introductionmentioning

confidence: 99%

“…The bioextracts show higher inhibition efficiency than conventional monoethylene glycol. 42 Tang et al studied various green inhibitors and concluded that amino acids, antifreeze proteins, and ionic liquids, at lower concentrations, are effective kinetic inhibitors, and ionic liquids at higher concentrations can be used as prominent thermodynamic inhibitors. 43 These additives are environmentally friendly but lack an economic factor.…”

Section: ■ Introductionmentioning

confidence: 99%

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Inhibition of Methane Hydrates Using Biodegradable Additives

Kiran

Prasad

2021

ACS Omega

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Prevention of hydrate plugs during transportation of oil and natural gas in the pipeline network is challenging. Certain additives are often introduced into the process to eliminate/delay plug formation. Dominantly synthetic inhibitors are deployed in large volumes (∼20 to 30% by volume) to counter the problem and are highly expensive and, in some circumstances, toxic. The search for novel additives that are eco-friendly and act as inhibitors is in demand. The present study reports the thermodynamic inhibition (THI) capacity of some vastly available natural biopowders, such as Azadirachta indica (neem), Piper betel (betel), and Nelumbo nucifera (Indian lotus) in low dosage (0.5 wt %), on methane hydrate (MH) formation. Since the gas flow is dynamic, experiments are conducted in stirred geometry by varying the speed range from 0 to 1000 rotations per minute (rpm). All of the studies are performed in the isochoric method procedure. The biopowders act as efficient thermodynamic hydrate inhibitors. Once the nucleation triggers, they act as kinetic hydrate promoters. Since sodium dodecyl sulfate (SDS) is an excellent kinetic hydrate promoter in both stirred and nonstirred geometries, the obtained results are compared with the SDS system. Hydrate nucleation is triggered at higher subcooling (∼8 to 10 K) in the presence of water-soluble bioextracts. The neem leaf extracts showed a ∼30% lower hydrate conversion than SDS in identical experimental conditions. Two-stage hydrate nucleation occurred at higher stirring speeds, and the hydrate conversion is inferior (∼6%) between the primary and secondary stages. The addition of biopowder extracts is useful in controlling hydrate formation. A small quantity of biopowders provides higher inhibition and reduces synthetic chemicals used in real-time applications.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Inhibition of Methane Hydrates Using Biodegradable Additives

Kiran

Prasad

2021

ACS Omega

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“…The cavities are spherical but irregular, containing at least a guest molecule trapped within it by repulsive force. Therefore, the guest molecule(s) stabilizes the structure of the cavities, nevertheless spectrometry reveals that it is not staedfastly attached but allowed to rotate within the cavity [1,6].…”

Section: Introductionmentioning

confidence: 99%

Potency of starch in hydrate inhibition in a field within Gulf of Guinea Using Aspen Hysys

Chigozirim¹,

Taiwo²,

Ajienka³

2021

Global J. Eng. Tech. Adv.

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Hydrocarbon industry is now moving from onshore to offshore environments in search of black gold, since the world’s energy demand is growing astronomically. Exploitation of this black gold in an offshore environment is quite very capital intensive but not exonerated from flow assurance and intervention challenges. This is due to the fact that the black gold is produced alongside with BSW, associated gas, without which the black gold will be termed dead oil; also, there is restricted accessibility in an offshore environment. The result of hydrate formation includes blockage of flow lines, plaguing downstream equipment and flow line’s appurtenances such as Valves, Tees, Elbows. The current methods of preventing hydrate formation by the industry are highly limited and the chemicals used are harsh to the ecosystem. This study investigated the potency of Starch from Manihot Esculenta in hydrate inhibition using Aspen Hysys V11.0. The performances of considered hydrate inhibitors in a modeled flow line system with diameter355.6mm, length of 12.095 km in deep water hydrocarbon field within the Gulf of Guinea, were based on actual condition and production data. The simulation results at 40% and 80% water cuts were plotted for both steady state and dynamic state using Mat lab. At steady state, simulation results disclosed that there will be no hydrate formation. However, at dynamic state, simulation results disclosed that hydrates will form. HCF’s pressure declines from 61bar to 40.52bar, 32.43bar respectively, for the different water cuts, in induction time of 240 minutes. Likewise, HCF’s temperature declined suddenly and sharply rose again indicating hydrate formations. Starch at 0.05, 0.1, 0.15, 0.2 mole fractions prevented hydrates from forming but best at 0.2 mole fractions. Starch was therefore, recommended for field-pilot test and further developed, utilized as an ecofriendly hydrate inhibitor.

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