Thermodynamics Research Center / ThermoML | International Journal of Thermophysics

A Digital Variable-Angle Rolling-Ball Viscometer for Measurement of Viscosity, Density, and Bubble-Point Pressure of CO2 and Organic Liquid Mixtures

Sato, Y.[Yoshiyuki], Yoshioka, H.[Hiroki], Aikawa, S.[Shohei], Smith Jr., R. L.[Richard L.]
Int. J. Thermophys. 2010, 31, 10, 1896-1903
ABSTRACT
A new apparatus was developed for measuring the viscosity, density, and bubble-point pressure of CO2 and organic liquid mixtures. The apparatus is based on the rolling-ball principle and consists of a computer-controlled stepper motor that rotates a high-pressure cell that is equipped with a sapphire window, amovable piston, and a position-sensing device. Design of the high-pressure cell was made such that compositions could be determined by mass. The viscosity was determined by sensing the speed of a rolling ball, and the density was determined by sensing the position of the piston with a linear-variable differential transformer. Bubble-point pressures were measured with the synthetic method. The viscosity and density of octane and decane were measured, and the average deviations of these properties compared with reliable literature values were 1.1% and 0.15%, respectively. The viscosity and density of CO2 +tetrahydrofuran system were measured at a temperature of 60 .C, a pressure of 10.2MPa, and CO2 mole fractions up to 0.3. Bubble-point pressures for the CO2 +tetrahydrofuran system were in good agreement with literature data.
Compounds
# Formula Name
1 C10H22 decane
2 C8H18 octane
3 C7H8 toluene
4 C4H8O tetrahydrofuran
5 CO2 carbon dioxide
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
  • Viscosity, Pa*s ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Falling or rolling sphere viscometry
  • 7
  • POMD
  • 1
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Pycnometric method
  • 7
  • POMD
  • 2
  • Viscosity, Pa*s ; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Falling or rolling sphere viscometry
  • 4
  • POMD
  • 2
  • Mass density, kg/m3 ; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Pycnometric method
  • 4
  • POMD
  • 3
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Pycnometric method
  • 6
  • POMD
  • 4
  • Viscosity, Pa*s ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Falling or rolling sphere viscometry
  • 1
  • POMD
  • 4
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Pycnometric method
  • 1
  • POMD
  • 4
  • 5
  • Viscosity, Pa*s ; Liquid
  • Mole fraction - 5; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Falling or rolling sphere viscometry
  • 4
  • POMD
  • 4
  • 5
  • Vapor or sublimation pressure, kPa ; Liquid
  • Mole fraction - 5; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Closed cell (Static) method
  • 2
  • POMD
  • 4
  • 5
  • Mass density, kg/m3 ; Liquid
  • Mole fraction - 5; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Pycnometric method
  • 4