Replacement of methane hydrate by carbon dioxide: C-13 NMR study for studying a limit to the degree of substitution

The results presented here show that, at least in a laboratory setting, the replacement of CH4 by CO2 is favored from the points of view of equilibrium thermodynamics. Pure and mixed-phase hydrates were prepared in porous silica gel in order to observe the guest distribution in hydrate cages by 13C...

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Bibliographic Details
Main Authors: Lee, H, Seo, Yongwon, Seo, YT, Kim, DY, Moudrakovski, IL, Ripmeester, JA
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier BV 2004
Subjects:
OCEAN SEQUESTRATION
PHASE-EQUILIBRIA
CO2
Methane hydrate
Online Access:http://scholarworks.unist.ac.kr/handle/201301/8084
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=9744238945
Description
Summary:The results presented here show that, at least in a laboratory setting, the replacement of CH4 by CO2 is favored from the points of view of equilibrium thermodynamics. Pure and mixed-phase hydrates were prepared in porous silica gel in order to observe the guest distribution in hydrate cages by 13C NMR spectroscopy. The resulting ratio values for CH 4 in small and large cages strongly suggested that at least 64% of methane should be recoverable from a hydrate of composition CH 4ยท05H2O. close 3 3

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