Compressed liquid density measurements of dimethyl ether with a vibrating tube densimeter

A measurement system for compressed liquid densities over the temperature range of (293 to 373) K with pressures up to 70 MPa has been developed in this work. The core component of the system is a commercial vibrating tube densimeter (DMA-HPM) and the system was calibrated by water and vacuum via the method of Lagourette et al. Compressed liquid densities of dimethyl ether have been measured along nine isotherms between (293.84 and 372.94) K up to 70 MPa with the densimeter system as a function of temperature and pressure. The experimental data obtained in this work were correlated to the Tait equation with an average absolute percentage deviation of 0.014%. Also, the Tait equation was compared with the literature data.

► A density measurement system based on Anton Paar DMA-HPM was developed in this work.
► Compressed liquid densities of dimethyl ether up to 373 K and 70 MPa were measured.
► The data were correlated to a Tait-type equation with an AAD value of 0.014%.