Phase equilibrium relations of tetra-n-butylphosphonium propionate and butyrate semiclathrate hydrates

Shimada, Jin; Shimada, Masami; Sugahara, Takeshi; Tsunashima, Katsuhiko

doi:https://doi.org/10.1016/j.fluid.2018.11.038

Phase equilibrium relations of tetra-n-butylphosphonium propionate and butyrate semiclathrate hydrates

Shimada, Jin; Shimada, Masami; Sugahara, Takeshi et al.

Fluid Phase Equilibria, 2019, 485, 61-66

アクセス数:98件（2025-04-04 09:28 集計）

固定URL: https://hdl.handle.net/11094/91302

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タイトル	Phase equilibrium relations of tetra-n-butylphosphonium propionate and butyrate semiclathrate hydrates
著者	著者名 Shimada, Jin
	著者名 Shimada, Masami
	NRID 1000020335384 1000020335384 ORCID 0000-0002-5236-5605 0000-0002-5236-5605 researchmap permalink read0191169 read0191169 Scopus Author ID 56212469300 56212469300 著者名 Sugahara, Takeshi
	NRID 1000090550070 1000090550070 著者名 Tsunashima, Katsuhiko
キーワード等	Differential scanning calorimetry
	Enthalpy
	Phase equilibria
	Semiclathrate hydrate
	Supercooling
抄録	This paper reports phase equilibrium (temperature–composition) relations of semiclathrate hydrates formed from tetra-n-butylphosphonium propionate (TBP-Pro) and butyrate (TBP-But) + water systems. Their maximum solid–liquid phase equilibrium temperatures at atmospheric pressure were located at (288.75 ± 0.06) K and the mole fraction x1 = 0.035 ± 0.001 and (287.01 ± 0.06) K and x1 = 0.028 ± 0.001, respectively. They showed equilibrium temperatures higher than those of tetra-n-butylphosphonium formate, acetate, and lactate semiclathrate hydrates. The dissociation enthalpies of TBP-Pro and TBP-But semiclathrate hydrates were (190 ± 5) J·g−1 and (204 ± 5) J·g−1, respectively. The temperature difference between formation and dissociation, that is, the maximum allowable degree of supercooling, was (17.7 ± 1.5) K for TBP-Pro semiclathrate hydrate and (15.4 ± 1.4) K for TBP-But one.
出版者	Elsevier B.V.
収録物名	Fluid Phase Equilibria
巻(号)	485
ページ	61-66
刊行年月	2019-04-15
言語	英語
ハンドルURL	https://hdl.handle.net/11094/91302
PISSN	03783812
関連情報 (isVersionOf)	DOI (出版社版) https://doi.org/10.1016/j.fluid.2018.11.038
アクセス権	open access
権利情報	©2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
出版タイプ	Accepted Manuscript
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Fluid Phase Equilibria. 2019, 485, p. 61-66
DC.title	Phase equilibrium relations of tetra-n-butylphosphonium propionate and butyrate semiclathrate hydrates
DC.creator	Shimada, Jin
	Shimada, Masami
	Sugahara, Takeshi
	Tsunashima, Katsuhiko
DC.publisher	Elsevier B.V.
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2019-04-15
DC.identifier	https://doi.org/10.1016/j.fluid.2018.11.038
DC.subject	Differential scanning calorimetry
	Enthalpy
	Phase equilibria
	Semiclathrate hydrate
	Supercooling
DCTERMS.abstract	This paper reports phase equilibrium (temperature–composition) relations of semiclathrate hydrates formed from tetra-n-butylphosphonium propionate (TBP-Pro) and butyrate (TBP-But) + water systems. Their maximum solid–liquid phase equilibrium temperatures at atmospheric pressure were located at (288.75 ± 0.06) K and the mole fraction x1 = 0.035 ± 0.001 and (287.01 ± 0.06) K and x1 = 0.028 ± 0.001, respectively. They showed equilibrium temperatures higher than those of tetra-n-butylphosphonium formate, acetate, and lactate semiclathrate hydrates. The dissociation enthalpies of TBP-Pro and TBP-But semiclathrate hydrates were (190 ± 5) J·g−1 and (204 ± 5) J·g−1, respectively. The temperature difference between formation and dissociation, that is, the maximum allowable degree of supercooling, was (17.7 ± 1.5) K for TBP-Pro semiclathrate hydrate and (15.4 ± 1.4) K for TBP-But one.
DC.rights	©2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
DC.format	91302
citation_title	Phase equilibrium relations of tetra-n-butylphosphonium propionate and butyrate semiclathrate hydrates
citation_author	Shimada, Jin
	Shimada, Masami
	Sugahara, Takeshi
	Tsunashima, Katsuhiko
citation_publisher	Elsevier B.V.
citation_language	英語
citation_date	2019-04-15
citation_journal_title	Fluid Phase Equilibria
citation_volume	485
citation_firstpage	61
citation_lastpage	66
citation_doi	https://doi.org/10.1016/j.fluid.2018.11.038
citation_public_url	https://hdl.handle.net/11094/91302

Phase equilibrium relations of tetra-n-butylphosphonium propionate and butyrate semiclathrate hydrates

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