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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2096
Title: Influence of cationic and non-ionic surfactants on the kinetics of mixed hydrogen/tetrahydrofuran hydrates
Authors: Veluswamy H.P.
Ang W.J.
Zhao D.
Linga P.
Published in: Chemical Engineering Science
Abstract: In this study, the kinetics of mixed hydrogen/tetrahydrofuran (THF) hydrate formation in presence of cationic dodecyl trimethylammonium chloride (DTAC) surfactant and non-ionic Tween-20 (Polysorbate 20) surfactant was evaluated. Stoichiometric concentration of 5.6mol% THF solution with varying surfactant concentrations from 0.01wt% to 1wt% were experimented and their effect on the mixed hydrogen/THF hydrate formation was studied. Marginal improvement in the mixed hydrogen/THF hydrate formation rates were observed for both the chosen surfactants with maximum of about 20% increase using 0.5wt% DTAC and 0.1wt% Tween-20. Decomposition kinetics of mixed hydrogen/THF hydrates using thermal stimulation (?T=20K) with and without stirring showed that stirring improved the decomposition kinetics with t90 of 22.2(±0.8)min in comparison to t90 of 29.1(±0.6)min for the experiments conducted without stirring. The presence of surfactant did not significantly affect the decomposition kinetics for experiments conducted both with and without stirring. Methane/THF mixed hydrate formation under similar experimental conditions studied show that the presence of 0.5wt% DTAC surfactant resulted in reduction of hydrate formation rates by approximately 20%. The effect of surfactant in presence of THF characteristically differs depending upon the guest gas and the system under investigation. © 2015 Elsevier Ltd.
Citation: Chemical Engineering Science(2015), 132(): 186-199
URI: https://doi.org/10.1016/j.ces.2015.03.061
http://repository.iitr.ac.in/handle/123456789/2096
Issue Date: 2015
Publisher: Elsevier Ltd
Keywords: Gas hydrates
Hydrogen hydrates
Kinetics
Methane hydrate
Surfactant
Tetrahydrofuran
ISSN: 92509
Author Scopus IDs: 55603750900
55784699900
55510434800
57189447961
Author Affiliations: Veluswamy, H.P., Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117 585, Singapore
Ang, W.J., Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117 585, Singapore
Zhao, D., Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117 585, Singapore
Linga, P., Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117 585, Singapore
Corresponding Author: Linga, P.; Department of Chemical and Biomolecular Engineering, National University of SingaporeSingapore; email: praveen.linga@nus.edu.sg
Appears in Collections:Journal Publications [CH]

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