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

ISOTOPIC FRACTIONATION OF GUEST GAS AT THE FORMATION OF METHANE AND ETHANE HYDRATES Hachikubo, Akihiro; Ozeki, Takahiro; Kosaka, Tomoko; Sakagami, Hirotoshi; Minami, Hirotsugu; Nunokawa, Yutaka; Takahashi, Nobuo; Shoji, Hitoshi; Kida, Masato; Krylov, Alexey

Abstract

Stable isotope of natural gas hydrates provides useful information of their gas sources. We investigated the isotopic fractionation of gas molecules during the formation of synthetic gas hydrates composed of methane and ethane. The gas hydrate samples were experimentally prepared in a pressure cell and isotopic compositions (δ13C and δD) of both residual and hydratebound gases were measured. δD of hydrate-bound molecules of methane and ethane hydrates was several per mil lower than that of residual gas molecules in the formation processes, while there was no difference in the case of δ13C. Effect of temperature on the isotopic fractionation was also investigated and it was found that the fractionation was effective at low temperature.

Item Metadata

Title
ISOTOPIC FRACTIONATION OF GUEST GAS AT THE FORMATION OF METHANE AND ETHANE HYDRATES
Creator
Hachikubo, Akihiro; Ozeki, Takahiro; Kosaka, Tomoko; Sakagami, Hirotoshi; Minami, Hirotsugu; Nunokawa, Yutaka; Takahashi, Nobuo; Shoji, Hitoshi; Kida, Masato; Krylov, Alexey
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
Stable isotope of natural gas hydrates provides useful information of their gas sources. We investigated the isotopic fractionation of gas molecules during the formation of synthetic gas hydrates composed of methane and ethane. The gas hydrate samples were experimentally prepared in a pressure cell and isotopic compositions (δ13C and δD) of both residual and hydratebound gases were measured. δD of hydrate-bound molecules of methane and ethane hydrates was several per mil lower than that of residual gas molecules in the formation processes, while there was no difference in the case of δ13C. Effect of temperature on the isotopic fractionation was also investigated and it was found that the fractionation was effective at low temperature.
Extent
169237 bytes
Subject
Gas hydrate; Stable isotope; Isotopic fractionation; Methane; Ethane
Genre
Conference Paper
Type
Text
File Format
application/pdf
Language
eng
Date Available
2008-10-20
Provider
Vancouver : University of British Columbia Library
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International
DOI
10.14288/1.0041142
URI
http://hdl.handle.net/2429/2693
Affiliation
Non UBC
Citation
Hachikubo, Akihiro; Ozeki, Takahiro; Kosaka, Tomoko; Sakagami, Hirotoshi; Minami, Hirotsugu; Nunokawa, Yutaka; Takahashi, Nobuo; Shoji, Hitoshi; Kida, Masato; Krylov, Alexey. 2008. ISOTOPIC FRACTIONATION OF GUEST GAS AT THE FORMATION OF METHANE AND ETHANE HYDRATES. Proceedings of the 6th International Conference on Gas Hydrates (ICGH 2008), Vancouver, British Columbia, CANADA, July 6-10, 2008.
Peer Review Status
Unreviewed
Copyright Holder
Hachikubo, Akihiro
Rights URI
http://creativecommons.org/licenses/by-nc-nd/4.0/
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Attribution-NonCommercial-NoDerivatives 4.0 International