Comparative study of clathrate hydrate formation in the presence of octadecyltrichlorosilane-coated glass particles and sodium dodecyl sulphate

Li, Huijuan and Wang, Liguang (2014). Comparative study of clathrate hydrate formation in the presence of octadecyltrichlorosilane-coated glass particles and sodium dodecyl sulphate. In: Chemeca 14: Processing Excellence; Powering Our Future. Chemeca 14: Australasian Conference on Chemical Engineering 2014, Perth, WA, Australia, (1-10). 28 September-1 October, 2014.

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Name Description MIMEType Size Downloads
Author Li, Huijuan
Wang, Liguang
Title of paper Comparative study of clathrate hydrate formation in the presence of octadecyltrichlorosilane-coated glass particles and sodium dodecyl sulphate
Conference name Chemeca 14: Australasian Conference on Chemical Engineering 2014
Conference location Perth, WA, Australia
Conference dates 28 September-1 October, 2014
Convener Kevin Stevenson
Proceedings title Chemeca 14: Processing Excellence; Powering Our Future
Place of Publication Hawthorn, VIC, Australia
Publisher Institution of Chemical Engineers
Publication Year 2014
Sub-type Fully published paper
Open Access Status
Start page 1
End page 10
Total pages 10
Collection year 2015
Language eng
Formatted Abstract/Summary
Gases can be selectively and densely incorporated in clathrate hydrate, a crystalline host-guest compound where gas molecules are trapped in the cages of hydrogen-bonded water molecules, enabling gas separation and storage. A major technical barrier for hydrate-based gas separation and storage is the slow kinetics of hydrate formation. The present work compares the effects of octadecyltrichlorosilane (OTS)-coated glass particles and sodium dodecyl sulphate (SDS) on the formation of four different clathrate hydrates whose guest molecules are tetrahydrofuran (THF), tetra-n-butyl ammonium bromide (TBAB), cyclopentane (CP), and methane gas, respectively, in an unstirred reactor. The induction time indicating hydrate nucleation period was measured and the data were analysed using the classical nucleation theory. The results show that the nucleation of the hydrates with water-miscible THF and TBAB was promoted by OTS-coated particles but not SDS. For the hydrates with water-immiscible CP and CH4, the nucleation was promoted by both OTS-coated particles and SDS, with OTS-coated particles giving higher nucleation rates than SDS. Further measurements on CH4 hydrate growth find that within 20 hours, OTS-coated particles can also lead to higher cumulative gas uptake than SDS.
Keyword Methane hydrate
Surfactant
Hydrophobicity
Induction time
Nucleation rate
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Paper No. 1281.

 
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Created: Tue, 07 Oct 2014, 10:48:32 EST by Dr Liguang Wang on behalf of School of Chemical Engineering