Phase equilibrium for structure-H hydrates formed with methane and either pinacolone (3,3-dimethyl-2-butanone) or pinacolyl alcohol (3,3-dimethyl-2-butanol)

Ryo Ohmura, Tsutomu Uchida, Satoshi Takeya, Jiro Nagao, Hideki Minagawa, Takao Ebinuma, Hideo Narita

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

The pressure and temperature conditions for the four-phase equilibrium in systems that include structure-H hydrate, methane gas, liquid water, and either 3,3-dimethyl-2-butanone (pinacolone) or 3,3-dimethyl-2-butanol (pinacolyl alcohol) liquid have been measured over the temperature range T = 273 K to T = 281 K. At a given temperature, the equilibrium pressures of the systems with pinacolone and pinacolyl alcohol are lower by 1.8 MPa and 1.3 MPa, respectively, than those of the structure-I hydrate-forming methane + water system. The equilibrium pressures in the system with pinacolone are roughly equal to those for the system with neohexane, whereas the pressures for the system with pinacolyl alcohol are higher by 0.5 MPa than those with neohexane. This suggests that the hydroxyl functional groups on the large-molecule guest substances can increase the equilibrium pressure in structure-H hydrate-forming systems, whereas the ketone groups can have little influence on the pressure.

Original languageEnglish
Pages (from-to)1337-1340
Number of pages4
JournalJournal of Chemical and Engineering Data
Volume48
Issue number5
DOIs
Publication statusPublished - 2003 Sep
Externally publishedYes

Fingerprint

Methane
Hydrates
Butenes
Phase equilibria
Alcohols
Water
Liquids
Ketones
Hydroxyl Radical
Temperature
Functional groups
3,3-dimethyl-2-butanol
pinacolone
Gases
Hydrogen
Molecules

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Phase equilibrium for structure-H hydrates formed with methane and either pinacolone (3,3-dimethyl-2-butanone) or pinacolyl alcohol (3,3-dimethyl-2-butanol). / Ohmura, Ryo; Uchida, Tsutomu; Takeya, Satoshi; Nagao, Jiro; Minagawa, Hideki; Ebinuma, Takao; Narita, Hideo.

In: Journal of Chemical and Engineering Data, Vol. 48, No. 5, 09.2003, p. 1337-1340.

Research output: Contribution to journalArticle

Ohmura, Ryo ; Uchida, Tsutomu ; Takeya, Satoshi ; Nagao, Jiro ; Minagawa, Hideki ; Ebinuma, Takao ; Narita, Hideo. / Phase equilibrium for structure-H hydrates formed with methane and either pinacolone (3,3-dimethyl-2-butanone) or pinacolyl alcohol (3,3-dimethyl-2-butanol). In: Journal of Chemical and Engineering Data. 2003 ; Vol. 48, No. 5. pp. 1337-1340.
@article{95fc43770d714cc89d59122b9cd18c46,
title = "Phase equilibrium for structure-H hydrates formed with methane and either pinacolone (3,3-dimethyl-2-butanone) or pinacolyl alcohol (3,3-dimethyl-2-butanol)",
abstract = "The pressure and temperature conditions for the four-phase equilibrium in systems that include structure-H hydrate, methane gas, liquid water, and either 3,3-dimethyl-2-butanone (pinacolone) or 3,3-dimethyl-2-butanol (pinacolyl alcohol) liquid have been measured over the temperature range T = 273 K to T = 281 K. At a given temperature, the equilibrium pressures of the systems with pinacolone and pinacolyl alcohol are lower by 1.8 MPa and 1.3 MPa, respectively, than those of the structure-I hydrate-forming methane + water system. The equilibrium pressures in the system with pinacolone are roughly equal to those for the system with neohexane, whereas the pressures for the system with pinacolyl alcohol are higher by 0.5 MPa than those with neohexane. This suggests that the hydroxyl functional groups on the large-molecule guest substances can increase the equilibrium pressure in structure-H hydrate-forming systems, whereas the ketone groups can have little influence on the pressure.",
author = "Ryo Ohmura and Tsutomu Uchida and Satoshi Takeya and Jiro Nagao and Hideki Minagawa and Takao Ebinuma and Hideo Narita",
year = "2003",
month = "9",
doi = "10.1021/je034086y",
language = "English",
volume = "48",
pages = "1337--1340",
journal = "Journal of Chemical and Engineering Data",
issn = "0021-9568",
publisher = "American Chemical Society",
number = "5",

}

TY - JOUR

T1 - Phase equilibrium for structure-H hydrates formed with methane and either pinacolone (3,3-dimethyl-2-butanone) or pinacolyl alcohol (3,3-dimethyl-2-butanol)

AU - Ohmura, Ryo

AU - Uchida, Tsutomu

AU - Takeya, Satoshi

AU - Nagao, Jiro

AU - Minagawa, Hideki

AU - Ebinuma, Takao

AU - Narita, Hideo

PY - 2003/9

Y1 - 2003/9

N2 - The pressure and temperature conditions for the four-phase equilibrium in systems that include structure-H hydrate, methane gas, liquid water, and either 3,3-dimethyl-2-butanone (pinacolone) or 3,3-dimethyl-2-butanol (pinacolyl alcohol) liquid have been measured over the temperature range T = 273 K to T = 281 K. At a given temperature, the equilibrium pressures of the systems with pinacolone and pinacolyl alcohol are lower by 1.8 MPa and 1.3 MPa, respectively, than those of the structure-I hydrate-forming methane + water system. The equilibrium pressures in the system with pinacolone are roughly equal to those for the system with neohexane, whereas the pressures for the system with pinacolyl alcohol are higher by 0.5 MPa than those with neohexane. This suggests that the hydroxyl functional groups on the large-molecule guest substances can increase the equilibrium pressure in structure-H hydrate-forming systems, whereas the ketone groups can have little influence on the pressure.

AB - The pressure and temperature conditions for the four-phase equilibrium in systems that include structure-H hydrate, methane gas, liquid water, and either 3,3-dimethyl-2-butanone (pinacolone) or 3,3-dimethyl-2-butanol (pinacolyl alcohol) liquid have been measured over the temperature range T = 273 K to T = 281 K. At a given temperature, the equilibrium pressures of the systems with pinacolone and pinacolyl alcohol are lower by 1.8 MPa and 1.3 MPa, respectively, than those of the structure-I hydrate-forming methane + water system. The equilibrium pressures in the system with pinacolone are roughly equal to those for the system with neohexane, whereas the pressures for the system with pinacolyl alcohol are higher by 0.5 MPa than those with neohexane. This suggests that the hydroxyl functional groups on the large-molecule guest substances can increase the equilibrium pressure in structure-H hydrate-forming systems, whereas the ketone groups can have little influence on the pressure.

UR - http://www.scopus.com/inward/record.url?scp=0141731258&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0141731258&partnerID=8YFLogxK

U2 - 10.1021/je034086y

DO - 10.1021/je034086y

M3 - Article

VL - 48

SP - 1337

EP - 1340

JO - Journal of Chemical and Engineering Data

JF - Journal of Chemical and Engineering Data

SN - 0021-9568

IS - 5

ER -