Issue 23, 2013
From the journal:

RSC Advances

Guest molecule dynamics and guest-specific degassing phenomenon of binary gas hydrate investigated by terahertz time-domain spectroscopy†

Dong-Yeun Koh,a   Hyery Kang,a   Juwoon Park,a   Seonghoon Jung,b   Daehoon Han,c   Jaehun Parkb  and  Huen Lee*a  

* Corresponding authors

a Department of Chemical and Biomolecular Engineering and Graduate school of EEWS, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon, South Korea
E-mail: h_lee@kaist.ac.kr
Fax: (+) 82-42-350-3910
Tel: (+) 82-42-350-3917

b Pohang Accelerator Laboratory, POSTECH, Pohang 790-784, South Korea

c Department of Physics, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon, South Korea

Abstract

The behaviour of clathrate hydrates in the THz region could provide useful information about inclusion compounds. In this study, terahertz time-domain spectroscopy (THz-TDS) revealed the dynamics of gaseous guest molecules inside the water framework of a clathrate hydrate. Distinct footprints of each gaseous molecule (CH4, H2 and O2) inside the gas hydrate lattice were analysed. Thermally stimulated gas hydrates give out gas molecules (secondary guests) to remain secure, and each gas has a specific degassing temperature. In this way, they form the stable sII THF hydrate with empty small cages (512) which can survive at temperatures up to 278 K.

Graphical abstract: Guest molecule dynamics and guest-specific degassing phenomenon of binary gas hydrate investigated by terahertz time-domain spectroscopy

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Article information

DOI
https://doi.org/10.1039/C3RA40516H
Article type
Paper
Submitted
30 Jan 2013
Accepted
28 Mar 2013
First published
02 Apr 2013

RSC Adv., 2013,3, 8857-8863

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Guest molecule dynamics and guest-specific degassing phenomenon of binary gas hydrate investigated by terahertz time-domain spectroscopy

D. Koh, H. Kang, J. Park, S. Jung, D. Han, J. Park and H. Lee, RSC Adv., 2013, 3, 8857 DOI: 10.1039/C3RA40516H

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