A simple correlation to predict the hydrate quadruple point temperature for LPG mixtures
- IITRI/Westport Technology Center International, Houston, TX (United States)
- Scientific Software-Intercomp, Houston, TX (United States)
A simple correlation to predict the hydrate upper quadruple point temperature, T{sub Q2B} for liquefied petroleum gas (LPG) mixtures was developed. It was developed for use as a part of a modeling and control system for a LPG pipeline in Russia. For performance reasons, a simple hydrate prediction correlation was required that could be incorporated into the real-time and predictive pipeline simulation models. The operating company required both real time and predictive simulation tools be developed to assist in preventing hydrate blockages while minimizing the use of methanol. In this particular pipeline, LPG fluid moves through the pipeline as a single phase liquid above its bubble point pressure. Because of the very low flow rates, the trace amount of water present in the LPG drops out and creates water pools at low points in the pipeline. The pipeline pressure and seasonal temperatures are conducive for hydrate formation in these pools. Methanol and monoethylene glycol (MEG) are injected in the pipeline to help prevent hydrate formation. The newly developed correlation predicts the hydrate quadruple point temperature using only the composition and the molecular weight of the LPG mixture while retaining an accuracy comparable to the statistical thermodynamic models throughout the range of normal operating conditions.
- OSTI ID:
- 347833
- Report Number(s):
- CONF-9703180-; TRN: IM9923%%371
- Resource Relation:
- Conference: 76. annual meeting of the Gas Processors Association (GPA), San Antonio, TX (United States), 10-12 Mar 1997; Other Information: PBD: [1997]; Related Information: Is Part Of Seventy-sixth annual convention Gas Processors Association: Proceedings; PB: 249 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Quantifying hydrate formation and kinetic inhibition
Clean air program: Design guidelines for bus transit systems using liquefied petroleum gas (LPG) as an alternative fuel. Final report, July 1995-April 1996