Phase equilibria in the ternary system of carbon dioxide-tetrahydrofuran-water at gas hydrate forming conditions

Khalik M. Sabil; Cor J. Peters

Phase equilibria in the ternary system of carbon dioxide-tetrahydrofuran-water at gas hydrate forming conditions

Khalik M. Sabil^*, Cor J. Peters

^*Corresponding author for this work

School of Energy, Geoscience, Infrastructure and Society

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The three- and four-phase hydrate equilibria of the ternary system of CO₂ + tetrahydrofuran (THF) + water were measured by using a Cailletet equipment. Measurements showed that THF addition caused the hydrate equilibrium pressure to be drastically lowered by 60-80% at a specified temperature and equivalently the hydrate equilibrium temperature to be raised with about 6-8 K at a specified pressure depending on the concentration of THF in water. Depending on the overall composition of the systems, a liquid-liquid phase split was observed creating a four-phase equilibrium in the system and it was bounded by the bubble and dew points lines of the ternary system. At higher overall concentration of CO₂, experimental measurements showed that a pseudo-retrograde phenomenon exists at 2.5-5 MPa and 291 K. This is an abstract of a paper presented at the 2006 AIChE National Meeting (San Francisco, CA 11/12-17/2006).

Original language	English
Title of host publication	AIChE Annual Meeting, Conference Proceedings
Publication status	Published - 1 Dec 2006
Event	2006 AIChE Annual Meeting - San Francisco, CA, United Kingdom Duration: 12 Nov 2006 → 17 Nov 2006

Conference

Conference	2006 AIChE Annual Meeting
Country/Territory	United Kingdom
City	San Francisco, CA
Period	12/11/06 → 17/11/06

ASJC Scopus subject areas

Biotechnology
General Chemical Engineering
Bioengineering
Safety, Risk, Reliability and Quality

Cite this

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title = "Phase equilibria in the ternary system of carbon dioxide-tetrahydrofuran-water at gas hydrate forming conditions",

abstract = "The three- and four-phase hydrate equilibria of the ternary system of CO2 + tetrahydrofuran (THF) + water were measured by using a Cailletet equipment. Measurements showed that THF addition caused the hydrate equilibrium pressure to be drastically lowered by 60-80% at a specified temperature and equivalently the hydrate equilibrium temperature to be raised with about 6-8 K at a specified pressure depending on the concentration of THF in water. Depending on the overall composition of the systems, a liquid-liquid phase split was observed creating a four-phase equilibrium in the system and it was bounded by the bubble and dew points lines of the ternary system. At higher overall concentration of CO2, experimental measurements showed that a pseudo-retrograde phenomenon exists at 2.5-5 MPa and 291 K. This is an abstract of a paper presented at the 2006 AIChE National Meeting (San Francisco, CA 11/12-17/2006).",

author = "Sabil, {Khalik M.} and Peters, {Cor J.}",

year = "2006",

month = dec,

day = "1",

language = "English",

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T1 - Phase equilibria in the ternary system of carbon dioxide-tetrahydrofuran-water at gas hydrate forming conditions

AU - Sabil, Khalik M.

AU - Peters, Cor J.

PY - 2006/12/1

Y1 - 2006/12/1

N2 - The three- and four-phase hydrate equilibria of the ternary system of CO2 + tetrahydrofuran (THF) + water were measured by using a Cailletet equipment. Measurements showed that THF addition caused the hydrate equilibrium pressure to be drastically lowered by 60-80% at a specified temperature and equivalently the hydrate equilibrium temperature to be raised with about 6-8 K at a specified pressure depending on the concentration of THF in water. Depending on the overall composition of the systems, a liquid-liquid phase split was observed creating a four-phase equilibrium in the system and it was bounded by the bubble and dew points lines of the ternary system. At higher overall concentration of CO2, experimental measurements showed that a pseudo-retrograde phenomenon exists at 2.5-5 MPa and 291 K. This is an abstract of a paper presented at the 2006 AIChE National Meeting (San Francisco, CA 11/12-17/2006).

AB - The three- and four-phase hydrate equilibria of the ternary system of CO2 + tetrahydrofuran (THF) + water were measured by using a Cailletet equipment. Measurements showed that THF addition caused the hydrate equilibrium pressure to be drastically lowered by 60-80% at a specified temperature and equivalently the hydrate equilibrium temperature to be raised with about 6-8 K at a specified pressure depending on the concentration of THF in water. Depending on the overall composition of the systems, a liquid-liquid phase split was observed creating a four-phase equilibrium in the system and it was bounded by the bubble and dew points lines of the ternary system. At higher overall concentration of CO2, experimental measurements showed that a pseudo-retrograde phenomenon exists at 2.5-5 MPa and 291 K. This is an abstract of a paper presented at the 2006 AIChE National Meeting (San Francisco, CA 11/12-17/2006).

M3 - Conference contribution

AN - SCOPUS:58049122824

SN - 081691012X

SN - 9780816910120

BT - AIChE Annual Meeting, Conference Proceedings

T2 - 2006 AIChE Annual Meeting

Y2 - 12 November 2006 through 17 November 2006

ER -

Phase equilibria in the ternary system of carbon dioxide-tetrahydrofuran-water at gas hydrate forming conditions

Abstract

Conference

ASJC Scopus subject areas

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