Effect of interlayer ions on methane hydrate formation in clay sediments

The Journal of Physical Chemistry. B
Sun-Hwa YeonHuen Lee

Abstract

Natural methane hydrates occurring in marine clay sediments exhibit heterogeneous phase behavior with high complexity, particularly in the negatively charged interlayer region. To date, the real clay interlayer effect on natural methane hydrate formation and stability remains still much unanswered, even though a few computer simulation and model studies are reported. We first examined the chemical shift difference of 27Al, 29Si, and 23Na between dry clay and clay containing intercalated methane hydrates (MH) in the interlayer. We also measured the solid-state 13C MAS NMR spectra of MH in Na-montmorillonite (MMT) and Ca-montmorillonite (MMT) to reveal abnormal methane popularity established in the course of intercalation and further performed cryo-TEM and XRD analyses to identify the morphology and layered structure of the intercalated methane hydrate. The present findings strongly suggest that the real methane amount contained in natural MH deposits should be reevaluated under consideration of the compositional, structural, and physical characteristics of clay-rich sediments. Furthermore, the intercalated methane hydrate structure should be seriously considered for developing the in situ production technologies of the deep-ocea...Continue Reading

References

Mar 31, 1999·Proceedings of the National Academy of Sciences of the United States of America·K A Kvenvolden
May 6, 2003·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Yu-Taek SeoJohn A Ripmeester
Oct 28, 2005·Angewandte Chemie·Do-Youn KimHuen Lee
Aug 16, 2006·Proceedings of the National Academy of Sciences of the United States of America·Youngjune ParkHuen Lee
Sep 21, 2006·Journal of the American Chemical Society·Sun-Hwa YeonHuen Lee
Nov 30, 2006·Journal of the American Chemical Society·Do-Youn KimHuen Lee
Jan 19, 2007·Nature·Hailong LuJohn Pohlman

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Citations

Jan 15, 2014·Progress in Nuclear Magnetic Resonance Spectroscopy·Christian BonhommeDanielle Laurencin
Mar 15, 2018·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Lars BorchardtJoaquin Silvestre-Albero
Aug 10, 2010·Chemical Reviews·Andrey A GurtovenkoIlpo Vattulainen
May 23, 2014·Environmental Science & Technology·Taehyung ParkWoojin Lee

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