Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Measurements of the Speed of Sound for Mixtures of Methane + Butane with a Particular Focus on the Critical State

Plantier, F.[Frederic], Danesh, A.[Ali], Sohrabi, M.[Mehran], Daridon, J. L.[Jean-Luc], Gozalpour, F.[Fatosh], Todd, A. C.[Adrian C.]
J. Chem. Eng. Data 2005, 50, 2, 673-676
ABSTRACT
The speed of sound in binary mixtures of methane + butane has been measured in the subcritical, near-critical, and supercritical regions as a function of pressure at 311 K. The measurements were based on an acoustic pulse technique using a high-pressure vessel equipped with two 1-MHz transducers to generate and receive the ultrasonic wave. The results showed that the speed of sound decreased with decreasing pressure for mixtures in the subcritical region, whereas it passed through a minimum in the supercritical region.
Compounds
# Formula Name
1 CH4 methane
2 C4H10 butane
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • 2
  • Speed of sound, m/s ; Fluid (supercritical or subcritical phases)
  • Mole fraction - 1; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Pulse-echo method
  • 43