Effect of different surfactants on methane hydrate formation rate, stability and storage capacity
The effects of anionic surfactants sodium dodecyl sulfate (SDS) and linear alkyl benzene sulfonate (LABS), cationic surfactant cetyl trimethyl ammonium bromide (CTAB) and non-ionic surfactant ethoxylated nonylphenol (ENP) on the formation, dissociation and storage capacity of methane hydrate have be...
Gespeichert in:
Veröffentlicht in: | Fuel (Guildford) 2007-02, Vol.86 (3), p.434-441 |
---|---|
Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | The effects of anionic surfactants sodium dodecyl sulfate (SDS) and linear alkyl benzene sulfonate (LABS), cationic surfactant cetyl trimethyl ammonium bromide (CTAB) and non-ionic surfactant ethoxylated nonylphenol (ENP) on the formation, dissociation and storage capacity of methane hydrate have been investigated. Each surfactant was tested with 3 concentrations 300, 500 and 1000
ppm and it has been found that SDS, when prepared with these three concentrations speeds up the hydrate formation rate effectively. LABS increases the hydrate formation rate at 500 and 1000
ppm but decreases it at 300
ppm. CTAB and ENP have promotion effect on hydrate formation rate at 1000
ppm but decrease it at 300 and 500
ppm. Hydrate stability tests have been performed at three temperatures 268.2, 270.2 and 272.2
K with and without surfactant promoters. The results show that all tested additives increase the dissociation rate of methane hydrate below the ice point. CTAB has the minimum and LABS the maximum effect on the methane hydrate dissociation rate. Experimental results on hydrate gas content revealed that maximum storage capacity of 165
V/V is obtained with 1000
ppm of CTAB in water. |
---|---|
ISSN: | 0016-2361 1873-7153 |
DOI: | 10.1016/j.fuel.2006.07.032 |