Thermodynamic properties of isobutane-isopentane mixtures from -40 to +600/sup 0/F and up to 1000 psia

Technical Report · Sun Jul 01 04:00:00 EDT 1984

DOI:https://doi.org/10.2172/7051765· OSTI ID:7051765

Gallagher, J S; Levelt Sengers, J M.H.; Morrison, G; Sengers, J V

The Helmholtz function for pure isobutane from a recent correlation has been converted to a dimensionless form and a pressure-enthalpy chart based on this function has been generated by computer. A Helmholtz function for mixtures of isobutane and isopentane has been formed based upon the dimensionless isobutane Helmholtz function as the reference fluid by means of an extended corresponding-states principle. Scarce literature data for saturation properties of isopentane, and new data for its vapor pressure and for the critical line of the mixture were used. The accuracy of the surface was checked by comparing with literature enthalpy data and with new VLE data for the mixture. Tables of thermodynamic properties have been generated from this Helmholtz function for the 0.1 mole fraction isopentane-in-isobutane mixture in the single-phase region and on the dew- and bubble-point curves, together with properties of the coexisting phase. A pressure-enthalpy chart for this mixture has also been generated.

• Research Organization: National Bureau of Standards, Washington, DC (USA). Thermophysics Div.; Maryland Univ., College Park (USA). Inst. for Physical Science and Technology
• DOE Contract Number: AI03-82SF11653
• OSTI ID: 7051765
• Report Number(s): DOE/SF/11653-T11; ON: DE84015137
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
2-METHYLBUTANE
2-METHYLPROPANE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ALKANES
BINARY MIXTURES
DISPERSIONS
ENTHALPY
FLUIDS
GEOTHERMAL POWER PLANTS
Geothermal Legacy
HYDROCARBONS
MIXTURES
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
POWER PLANTS
PRESSURE DEPENDENCE
THERMAL POWER PLANTS
THERMODYNAMIC PROPERTIES
VAPOR PRESSURE
WORKING FLUIDS