An Equation of State and Compressed Liquid and Supercritical Densities for Sulfur Dioxide
E. Christian Ihmels, Eric Lemmon, Juergen Gmehling
Densities of sulfur dioxide (SO2) have been measured with a computer-controlled high temperature, high pressure vibrating tube densimeter system (DMA-HDT) in the sub- and supercritical states. The densities were measured at temperatures from 273 to 523 K and pressures up to 35 MPa (311 overall data points), from which a density range between 189 and 1478 kg.m-3 was covered. The accuracy in density measurement was estimated to be better than 0.2 kg.m-3. Using the measured densities and further thermodynamic data from the Dortmund Databank for Pure Component Proper-ties a 12-parameter Helmholtz equation of state was developed for S02. The equation of state is valid from 197.7 to 523 K with pressures up to 3 5 MPa. The uncertainty in density of the equation of state ranges from 0.2% at low temperatures in the liquid and vapor to 0.5% at the highest temperatures. The uncertainty in heat capacities is 2% and the uncertainty in vapor pressure is 0.4%. In the critical region, the uncertainties are higher for all properties except vapor pressure.
Fluid Phase Equilibria
density, equation of state, sulphur dioxide, thermodynamic properties
, Lemmon, E.
and Gmehling, J.
An Equation of State and Compressed Liquid and Supercritical Densities for Sulfur Dioxide, Fluid Phase Equilibria
(Accessed May 28, 2023)