Can cyclopentane hydrate formation be used to screen the performance of surfactants as LDHI anti-agglomerants at atmospheric pressure?

Abojaladi, Nazila; Kelland, Malcolm A.

doi:10.1016/j.ces.2016.06.067

Cited by 18 publications

(25 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The state of the THF hydrate crystals was observed visually. The results of visual observation can be correlated with other methods used for the study of hydrate crystal formation and agglomeration, such as by using high‐pressure testing equipment (Abojaladi & Kelland, ). The main concern in visual observation is the variability in the obtained results.…”

Section: Resultsmentioning

confidence: 99%

“…Chua and Kelland () ranked their AA additives depending upon the hydrate crystal agglomeration state: Rank (A) represents finely dispersed hydrates and no increase in run time; (B) no plugging and run time increase; (C) significant deposit; (D) plug of hydrates; and (E) hard plug of hydrates (Chua & Kelland, ). Abojaladi and Kelland () used a visual method to identify the hydrate crystal agglomeration state and classified the tested AA into three categories: Category A is the best and represents fine dispersion of hydrate crystals (Teflon magnetic bar still stirring); category B represents high‐viscosity, slushy hydrates (Teflon stirrer bar eventually not moving); and category C represents hydrate crystals forming hard lumps (Teflon stirrer bar stops quickly) (Abojaladi & Kelland, ).…”

Section: Methodsmentioning

confidence: 99%

“…York and Firoozabadi () used THF hydrates in a multiple screening tube rocking apparatus for measuring the effectiveness of AA (York & Firoozabadi, ). Abojaladi and Kelland () found that cyclopentane hydrates along with visual method could be used for the initial screening of AA (Abojaladi & Kelland, ). THF hydrates form at an equilibrium temperature of 4.4 °C and atmospheric pressure.…”

Section: Introductionmentioning

confidence: 99%

“…Quaternary ammonium surfactants have been used as hydrate AA additives (Kelland, Grinød, & Dirdal, ; York & Firoozabadi, ). Earlier studies had found that most of the cationic surfactants, in comparison to anionic and nonionic surfactants, are better hydrate AA additives (Abojaladi & Kelland, ). CTAB, (C 16 H 33 )N(CH 3 ) 3 ]Br, is a quaternary ammonium (cationic) surfactant with 16 carbon atoms attached to a polar/hydrophilic headgroup and a hydrophobic tail (Fig.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Evaluation of Soy Lecithin as Eco‐Friendly Biosurfactant Clathrate Hydrate Antiagglomerant Additive

Saikia

Mahto

2018

J Surfact & Detergents

View full text Add to dashboard Cite

Hydrate plug formation is one of the most challenging problems in upstream oilfields. The most preferred option to prevent hydrate plug formation is the use of antiagglomerants in the oil/gas flowlines and in drilling fluids. Antiagglomerants do not prevent hydrate formation but restrict the hydrate crystals from agglomerating. In this study, experiments were conducted on of soy lecithin (biosurfactant) at different concentrations to measure its effectiveness as an antiagglomerant additive. In all the experiments, tetrahydrofuran (THF) hydrate was used, and to study the antiagglomerant efficiency of the additive, visual observation was utilized. Soy lecithin was compared with cetyltrimethylammonium bromide (CTAB), and the former was found as a good environmentally friendly antiagglomerant additive. Soy lecithin at 0.1 wt% in the experimental solution increased the agglomeration time of hydrate crystals by more than 1440 min and showed agglomeration state III at 1 C. Soy lecithin at 0.01 wt% increased the agglomeration time of hydrate crystals to 1000 min. The effect of soy lecithin on the rheological characteristics and filtration properties of drilling fluid was also studied. Even at the highest concentration of 1.0 wt% soy lecithin and at a temperature of 1 C, the rheological parameters of the drilling fluid remained within permissible limits. Soy lecithin was thus found to effectively restrict the agglomeration of hydrate crystals.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of Soy Lecithin as Eco‐Friendly Biosurfactant Clathrate Hydrate Antiagglomerant Additive

Saikia

Mahto

2018

J Surfact & Detergents

View full text Add to dashboard Cite

show abstract

“…Maeda et al, 2016 presents a modified version of visual methods in which parallel fast screening of different hydrate inhibitors can be done with ease, but the detection of hydrate induction and growth was identified only visually [16]. Abojaladi and Kelland, 2016 presents an experimental study that shows the visual method can be used for initial screening of anti-agglomerant using cyclopentane hydrates [25]. The main drawback of the visual detection method is the measurement accuracy of hydrate induction time.…”

Section: Introductionmentioning

confidence: 99%