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

Structural transition and phase behavior of N2 gas hydrates with pinacolyl alcohol and tert-amyl alcohol

Author(s)
Kim, EunaeJin, Young KeunSeo, Yongwon
Issued Date
2015-05
DOI
10.1016/j.fluid.2015.02.033
URI
https://scholarworks.unist.ac.kr/handle/201301/11046
Fulltext
http://www.sciencedirect.com/science/article/pii/S0378381215001016#
Citation
FLUID PHASE EQUILIBRIA, v.393, pp.85 - 90
Abstract
The influences of large molecular alcohols (LMAs) (pinacolyl alcohol (PCA) and tert-amyl alcohol (tAA)) on N2 hydrate were examined with a primary focus on the hydrate phase equilibria and structural transition. The four-phase (H-Lw-LLMA-V) equilibria of the N2+PCA+water and N2+tAA+water systems were experimentally measured in order to determine the thermodynamic stability conditions of the N2 hydrates with LMAs. The H-Lw-LLMA-V curves of both N2+PCA and N2+tAA hydrates were significantly shifted to more thermodynamically stable regions. Powder X-ray diffraction (PXRD) and Raman analyses verified that the structure of N2 hydrates with LMAs was transformed from the original structure of sII to sH (P6/mmm) as a result of the inclusion of LMAs. In addition, the formation of sH hydrate from the N2+PCA+water system was further verified using an endothermic dissociation thermogram from a high pressure micro-differential scanning calorimeter (HP μ-DSC) by confirming the appearance of three distinct peaks that correspond to ice, sII hydrate, and sH hydrate. Therefore, the experimental results that were obtained in this study are expected to be informative for understanding the roles of LMAs in affecting the macroscopic hydrate phase behavior and microscopic hydrate structure. © 2015 Elsevier B.V
Publisher
ELSEVIER SCIENCE BV
ISSN
0378-3812
Keyword (Author)
NitrogenPinacolyl alcoholSH hydrateStructural transitionTert-Amyl alcohol
Keyword
PRE-COMBUSTION CAPTURESTRUCTURE-H HYDRATECLATHRATE HYDRATECARBON-DIOXIDENATURAL-GASMETHANE HYDRATEDESALINATIONEQUILIBRIUMSEPARATIONSTABILITY

qrcode

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