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

Khalik M. Sabil, Cor J. Peters

Research output: Chapter in Book/Report/Conference proceedingConference 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 languageEnglish
Title of host publicationAIChE Annual Meeting, Conference Proceedings
Publication statusPublished - 1 Dec 2006
Event2006 AIChE Annual Meeting - San Francisco, CA, United Kingdom
Duration: 12 Nov 200617 Nov 2006

Conference

Conference2006 AIChE Annual Meeting
CountryUnited Kingdom
CitySan Francisco, CA
Period12/11/0617/11/06

ASJC Scopus subject areas

  • Biotechnology
  • Chemical Engineering(all)
  • Bioengineering
  • Safety, Risk, Reliability and Quality

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