Hydrophobized particles can accelerate nucleation of clathrate hydrates

Li, Huijuan and Wang, Liguang (2015) Hydrophobized particles can accelerate nucleation of clathrate hydrates. Fuel, 140 440-445. doi:10.1016/j.fuel.2014.10.005

Author Li, Huijuan
Wang, Liguang
Title Hydrophobized particles can accelerate nucleation of clathrate hydrates
Journal name Fuel   Check publisher's open access policy
ISSN 0016-2361
Publication date 2015-01-15
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.fuel.2014.10.005
Volume 140
Start page 440
End page 445
Total pages 6
Place of publication Oxford, United Kingdom
Publisher Elsevier
Language eng
Formatted abstract
This paper reports the effects of glass particles coated by N,N-dimethyl-N-octadecyl-3-aminopropyl trimethoxysilyl chloride (DMOAP) and octadecyltrichlorosilane (OTS) on the nucleation of tetrahydrofuran (THF), cyclopentane (CP), tetra-n-butyl ammonium bromide (TBAB) and methane (CH4) hydrates under static conditions with no agitation. Induction-time data were collected and statistically processed in the form of probability (P) distribution of samples undergoing no formation of clathrate hydrates as a function of time. Nucleation rate was calculated by fitting the P values to an equation based on the classical nucleation theory. It was found that within 12 h, the nucleation rates of all four hydrates were significantly increased by introducing OTS-coated (hydrophobic) surfaces. In contrast, DMOAP-coated (partly hydrophobic) glass surfaces and clean (hydrophilic) glass surfaces had no effect on the formation of CP and CH4 hydrates but showed relatively weak promotion effect on the formation of THF and TBAB hydrates. It was also found that the position where OTS-coated particles were loaded was of paramount importance for the nucleation of the hydrates with water-immiscible CP and CH4, and the appropriate loading position was at the guest/water interface. These results suggest that foreign particles when properly hydrophobized and loaded can accelerate clathrate hydrate nucleation.
Keyword Hydrophobicity
Surfactant coating
Induction time
Probability distribution
Nucleation rate
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 13 October 2014

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 11 times in Scopus Article | Citations
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Created: Mon, 20 Oct 2014, 01:52:58 EST by Dr Liguang Wang on behalf of School of Chemical Engineering