New Insights into the Kinetics and Morphology of CO2 Hydrate Formation in the Presence of Sodium Dodecyl Sulfate

An experiment on effects of composite promoting agents composed of surfactants and liquid hydrocarbons on hydrate formation was conducted and hydrate formation temperature, pressure, induction time and rate with different composite promoting agent portfolios were measured. Surfactants used were sodium dodecyl sulfate (SDS), sodium dodecyl benzene sulfonate(SDBS) and 2-octyl sodium dodecyl sulfate(GC20S), and liquid hydrocarbon additives utilized were ring silane e (CP) and methyl cyclohexane (MCH). It appeared that all these combinations of composite promoting agents could promote hydrate formation. Type II and H hydrate formation conditions with composite promoting agents CP+GC20S and MCH+GC20S respectively were the mildest and the induction time was the shortest.

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Solubility of ethylene in aqueous solution of sodium dodecyl sulfate at ambient temperature and near the hydrate formation region

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2006.01.007 ◽

2006 ◽

Vol 298 (2) ◽

pp. 952-956 ◽

Cited By ~ 11

Author(s):

Hu Luo ◽

Chang-Yu Sun ◽

Bao-Zi Peng ◽

Guang-Jin Chen

Keyword(s):

Aqueous Solution ◽

Sodium Dodecyl Sulfate ◽

Ambient Temperature ◽

Sodium Dodecyl ◽

Hydrate Formation ◽

Formation Region ◽

Dodecyl Sulfate

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Roles of Sodium Dodecyl Sulfate on Tetrahydrofuran-Assisted Methane Hydrate Formation

Journal of Oleo Science ◽

10.5650/jos.ess17275 ◽

2018 ◽

Vol 67 (6) ◽

pp. 707-717 ◽

Cited By ~ 3

Author(s):

Atsadawuth Siangsai ◽

Katipot Inkong ◽

Santi Kulprathipanja ◽

Boonyarach Kitiyanan ◽

Pramoch Rangsunvigit

Keyword(s):

Sodium Dodecyl Sulfate ◽

Methane Hydrate ◽

Sodium Dodecyl ◽

Hydrate Formation ◽

Dodecyl Sulfate

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Research of Surfactants Effect on Methane Hydrate Formation with Properties of Biochemical Materials

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.675.284 ◽

2013 ◽

Vol 675 ◽

pp. 284-288 ◽

Cited By ~ 1

Author(s):

Bin Dou ◽

Hui Gao ◽

Lei Ren

Keyword(s):

Sodium Dodecyl Sulfate ◽

Methane Hydrate ◽

Pure Water ◽

Sodium Dodecyl ◽

Water System ◽

Hydrate Formation ◽

Liquid Pool ◽

Pool Surface ◽

Dodecyl Sulfate ◽

Gas Consumption

This paper deals with the effects of a surfactant additive on the formation of methane hydrate in water system with and without sodium dodecyl sulfate (SDS). The properties of sodium dodecyl sulfate are listed. The results manifested that the presence of SDS could not only accelerate the hydrate formation process, but also increase the partition coefficient of methane between hydrate and vapor drastically. The paper then describes our experimental observations of the hydrate formation from methane, to show how the hydrate formation behaviors are affected by the additives of chamber partially filled with a quiescent pool of water (pure water or an aqueous SDS solution) to compensate for the gas consumption due to the hydrate formation, thereby maintaining a constant pressure inside the chamber. The results revealed that the addition of SDS not only on the liquid-pool surface but also on the chamber walls above the level of the pool surface, leaving the bulk of the liquid pool free from hydrate crystals. An excessive addition of SDS beyond the solubility was found to cause a decrease in the rate of hydrate formation but an increase in the final level of the water-to-hydrate conversion.

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