Density measurements of compressed-liquid dimethyl ether + pentane mixtures

摘要

Compressed-liquid densities of three compositions of the binary mixture dimethyl ether (CAS No. 115-10-6) + pentane (CAS No. 109-66-0) have been measured with a vibrating U-tube densimeter. Measurements were made at temperatures from 270 K to 390 K with pressures from 1.0 MPa to 50 MPa. The overall combined uncertainty (k = 2) of the density data is 0.81 kg·m~(-3). Data presented here have been used to improve a previously formulated Helmholtz energy based mixture model. The newly derived parameters are given.