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

Bando, Tatsuya; Sugahara, Takeshi

doi:https://doi.org/10.1016/j.fluid.2015.10.015

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:85（2025-04-12 23:11 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
Creator	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

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Resource Type	journal article
Local Type	Journal Article
DCMI Type	Text
DCTERMS.bibliographicCitation	Fluid Phase Equilibria. 2016, 413, p. 36-40
DC.title	Phase behavior of ethane hydrate system in the presence of ammonium bromide
DC.creator	Bando, Tatsuya
DC.creator	Sugahara, Takeshi
DC.publisher	Elsevier B.V.
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2016-04-15
DC.identifier	https://doi.org/10.1016/j.fluid.2015.10.015
DC.subject	Clathrate hydrate
	Phase equilibria
	Raman spectroscopy
	Structural transition
DCTERMS.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.
DC.rights	©2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
DC.format	91304
citation_title	Phase behavior of ethane hydrate system in the presence of ammonium bromide
citation_author	Bando, Tatsuya
citation_author	Sugahara, Takeshi
citation_publisher	Elsevier B.V.
citation_language	English
citation_date	2016-04-15
citation_journal_title	Fluid Phase Equilibria
citation_volume	413
citation_firstpage	36
citation_lastpage	40
citation_doi	https://doi.org/10.1016/j.fluid.2015.10.015
citation_public_url	https://hdl.handle.net/11094/91304