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International Conference on Gas Hydrates (ICGH) (6th : 2008)

RAMAN SPECTROSCOPIC OBSERVATIONS ON THE STRUCTURAL CHARACTERISTICS AND DISSOCIATION BEHAVIOR OF METHANE HYDRATE SYNTHESIZED IN SILICA SANDS WITH VARIOUS SIZES Liu, Changling; Ye, Yuguang; Zhang, Xunhua; Lu, Hailong; Ripmeester, John A.

Abstract

Raman spectroscopic observations of the characteristics and dissociation of methane hydrate were carried out on hydrates synthesized in silica sands with particle sizes of 53-75 μm, 90-106 μm, 106-150 μm, and 150-180 μm. The results obtained indicate that methane hydrates formed in silica sands had similar characteristics regarding cage occupancy and hydration number (5.99) to bulk hydrate, indicative of no influence of particle size on hydrate composition. During hydrate dissociation, the change in average intensity ratio of large to small cages were generally consistent with that of bulk hydrate but dropped dramatically after a certain time, and this turning point seems to be related to the particle size of silica sands.

Item Metadata

Title
RAMAN SPECTROSCOPIC OBSERVATIONS ON THE STRUCTURAL CHARACTERISTICS AND DISSOCIATION BEHAVIOR OF METHANE HYDRATE SYNTHESIZED IN SILICA SANDS WITH VARIOUS SIZES
Creator
Liu, Changling; Ye, Yuguang; Zhang, Xunhua; Lu, Hailong; Ripmeester, John A.
Contributor
University of British Columbia. Department of Chemical and Biological Engineering; International Conference on Gas Hydrates (6th : 2008 : Vancouver, B.C.)
Date Issued
2008-07
Description
Raman spectroscopic observations of the characteristics and dissociation of methane hydrate were carried out on hydrates synthesized in silica sands with particle sizes of 53-75 μm, 90-106 μm, 106-150 μm, and 150-180 μm. The results obtained indicate that methane hydrates formed in silica sands had similar characteristics regarding cage occupancy and hydration number (5.99) to bulk hydrate, indicative of no influence of particle size on hydrate composition. During hydrate dissociation, the change in average intensity ratio of large to small cages were generally consistent with that of bulk hydrate but dropped dramatically after a certain time, and this turning point seems to be related to the particle size of silica sands.
Extent
357451 bytes
Subject
Raman spectroscopy; Methane hydrate; Silica sand; Cage occupancy; Hydration number; Dissociation behavior
Genre
Conference Paper
Type
Text
File Format
application/pdf
Language
eng
Date Available
2008-07-23
Provider
Vancouver : University of British Columbia Library
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International
DOI
10.14288/1.0040952
URI
http://hdl.handle.net/2429/1100
Affiliation
Non UBC
Citation
Liu, Changling; Ye, Yuguang; Zhang, Xunhua; Lu, Hailong; Ripmeester, John A. 2008. RAMAN SPECTROSCOPIC OBSERVATIONS ON THE STRUCTURAL CHARACTERISTICS AND DISSOCIATION BEHAVIOR OF METHANE HYDRATE SYNTHESIZED IN SILICA SANDS WITH VARIOUS SIZES. Proceedings of the 6th International Conference on Gas Hydrates (ICGH 2008), Vancouver, British Columbia, CANADA, July 6-10, 2008.
Peer Review Status
Unreviewed
Rights URI
http://creativecommons.org/licenses/by-nc-nd/4.0/
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Attribution-NonCommercial-NoDerivatives 4.0 International