Compressed liquid densities and excess volumes of CO₂ + n-nonane and CO₂ + n-undecane mixtures at temperatures from 313 K to 363 K and pressures up to 25 Mpa

Compressed liquid densities for the n-nonane, n-undecane, CO₂+n-nonane and CO₂+n-undecane binary mixtures were determined from 313 to 363 K and ≤ 25 MPa. The experimental densities obtained were correlated with the Benedict-Webb-Rubin-Starling EOS (BWRS EoS) and with the five and six-parameter equations modified by Toscani-Swarcz (MTS). The density values calculated by the MTS equations of state agree within an AAD of 0.01% with data reported by the NIST for nonane and 0.07% with published. for undecane. Excess molar volumes for the binary mixtures were obtained with the n-nonane and n-undecane densities calculated by the BWRS EOS and CO₂ densities calculated from the Span-Wagner EOS. This is an abstract of a paper presented at the 2007 AIChE Annual Meeting (Salt Lake City, UT 11/4-9/2007).