File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

서용원

Seo, Yongwon
Advanced Clean Energy Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Abnormal structural transformation of tetra-n-butyl ammonium chloride plus Xe clathrates and its significance for clathrate-based Xe capture and storage

Author(s)
Lim, JunkyuLee, JoonseopSeo, Yongwon
Issued Date
2022-11
DOI
10.1039/d2cp04563j
URI
https://scholarworks.unist.ac.kr/handle/201301/60473
Citation
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.24, no.48, pp.29451 - 29460
Abstract
Tetra-n-butyl ammonium chloride (TBAC) is a semi-clathrate former that can be used for clathrate-based gas capture and storage since TBAC semi-clathrate has vacant small cages available for entrapping gas molecules under mild conditions. In this study, the phase equilibria and structural information of TBAC + Xe + water systems were experimentally investigated at two different TBAC concentrations (1.0 and 3.3 mol%). The slopes of the three-phase (clathrate [H] - liquid [L] - vapor [V]) equilibrium lines for the TBAC + Xe + water systems altered at one or two points as the pressure and temperature changed, which indicates that this slope change might be caused by the structural transformation of the clathrates that were formed. The powder X-ray diffraction (PXRD) patterns, in situ Raman spectra, and Xe-129 nuclear magnetic resonance (NMR) spectra demonstrated that the clathrate structure of the TBAC + Xe + water systems changed from tetragonal (P4(2)/m) or orthorhombic (Pmma) to cubic (Pm3n) as the pressure increased. Surprisingly, in the higher-pressure region, TBAC acted as a thermodynamic inhibitor without being enclathrated in the clathrate lattices. The thermodynamic and structural information of the TBAC + Xe clathrates will be helpful for conceptualizing and designing the clathrate-based noble gas or radioactive gas capture and storage process.
Publisher
ROYAL SOC CHEMISTRY
ISSN
1463-9076
Keyword
GUEST GAS ENCLATHRATIONCO2 CAPTUREPHASE-EQUILIBRIATHERMODYNAMIC PROPERTIESBUTYLAMMONIUM BROMIDESEMICLATHRATE HYDRATEXENONHYDROGENTETRABUTYLAMMONIUMSEPARATION

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.