کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
215679 | 1426259 | 2012 | 8 صفحه PDF | دانلود رایگان |
A new falling-body viscometer has been implemented to measure viscosity of liquids in a temperature range from (313.15 to 363.15) K at pressures up to 150 MPa. The accuracy of the viscometer was verified after comparing experimental results of squalane with previous literature data finding an average absolute deviation lower than 1.5%. With this device, we have measured viscosity values for three ionic liquids: 1-ethyl-3-methylimidazolium ethylsulfate, 1-butyl-1-methylpyrrolidinium bis(trifluoro-methylsulfonyl)imide and 1-(2-methoxyethyl)-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide within the temperature and pressure ranges noted above. The experimental values were correlated as a function of temperature and pressure with four different equations. In addition, we have analysed the pressure–viscosity derived properties for these fluids and for other five ionic liquids using literature values.
► Viscosities of three ILs were measured from (313.15 to 363.15) K and up to 150 MPa.
► Measurements were carried out using a new falling body viscometer.
► For 8 ILs pressure–viscosity behaviour was analysed as a function of the structure.
Journal: The Journal of Chemical Thermodynamics - Volume 54, November 2012, Pages 302–309