Does SDS micellize under methane hydrate-forming conditions below the normal Krafft point?

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Sodium dodecyl sulfate (SDS) can accelerate nucleation and growth of gas hydrates in a quiescent system. The objective of this paper is to investigate whether or not SDS micelles form in the meta-stable region of methane hydrates by the direct measurement of aqueous SDS concentration. The SDS solubility in water with high-pressure methane is identical to that under atmospheric pressure at a temperature range of 270-282 K; thus, the Krafft point under these methane hydrate-forming conditions does not shift from the normal Krafft point (281-289 K) under atmospheric pressure. The mole fraction of methane in SDS solution is independent of aqueous SDS concentration at a hydrate-forming condition. These results suggest that at temperatures below the normal Krafft point, no SDS micelles are present in the aqueous phase even in a high-pressure methane environment. (C) 2007 Elsevier Inc. All rights reserved.
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Issue Date
2007-11
Language
English
Article Type
Article
Keywords

SODIUM DODECYL-SULFATE; GAS HYDRATE; AQUEOUS-SOLUTIONS; SURFACTANT; SOLUBILITY; KINETICS; WATER

Citation

JOURNAL OF COLLOID AND INTERFACE SCIENCE, v.315, no.1, pp.313 - 318

ISSN
0021-9797
DOI
10.1016/j.jcis.2007.06.049
URI
http://hdl.handle.net/10203/174975
Appears in Collection
CBE-Journal Papers(저널논문)
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