Phase behavior of ethane hydrate system in the presence of ammonium bromide

Bando, Tatsuya; Sugahara, Takeshi

Fluid Phase Equilibria, 2016, 413, 36-40

Number of Access:335（2025-07-27 08:53 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/91304

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Title
Phase behavior of ethane hydrate system in the presence of ammonium bromide
Creator
CreatorName
Bando, Tatsuya
NRID
1000020335384 1000020335384
ORCID
0000-0002-5236-5605 0000-0002-5236-5605
researchmap permalink
read0191169 read0191169
Scopus Author ID
56212469300 56212469300
CreatorName
Sugahara, Takeshi
Subject
Clathrate hydrate
Phase equilibria
Raman spectroscopy
Structural transition
Abstract
The three-phase equilibrium curves of hydrate, aqueous, and gas phases in the ternary system of ethane (C2H6), ammonium bromide (NH4Br), and water were measured at pressures up to 3 MPa and temperatures of 278.45-283.76 K. The phase equilibrium curves exhibit two trends; the curve paralleled with that of simple C2H6 hydrate and the one steeper than that of simple C2H6 hydrate. The latter implies the incorporation of NH4Br into C2H6 hydrate while the former indicates the thermodynamic inhibition effect of NH4Br. To investigate the incorporation of NH4Br, Raman spectra of the N-stretching vibration of NH4+ were analyzed. Raman spectra imply the existence of the motionally restricted NH4+ in the formed hydrate. Both results from the phase behavior and Raman spectra imply the formation of C2H6 + NH4Br semi-clathrate hydrates.
Publisher
Elsevier B.V.
Source Title
Fluid Phase Equilibria
Volume (Issue)
413
Page
36-40
Date of Issued
2016-04-15
Language
English
Handle URL
https://hdl.handle.net/11094/91304
PISSN
03783812
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1016/j.fluid.2015.10.015
Access Rights
open access
CopyRight
©2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article