Abstrakt: | 1-Butanol can be considered as a good fuel additive, which can be used at high pressures.
Therefore, the knowledge of high-pressure thermophysical properties is crucial for this application.
In this paper, new experimental data on the speed of sound in 1-butanol in the temperature range from
293 to 318 K and at pressures up to 101 MPa are reported. The speed of sound at a frequency of 2 MHz
was measured at atmospheric and high pressures using two measuring sets operating on the principle
of the pulse–echo–overlap method. The measurement uncertainties were estimated to be better than
0.5 m s1 and 1 m s1 at atmospheric and high pressures, respectively. Additionally, the density
was measured under atmospheric pressure in the temperature range from 293 to 318 K using a
vibrating tube densimeter Anton Paar DMA 5000. Using the experimental results, the density and
isobaric and isochoric heat capacities, isentropic and isothermal compressibilities, isobaric thermal
expansion, and internal pressure were calculated at temperatures from 293 to 318 K and at pressures
up to 100 MPa. |