The densities of CO₂-R1234ze(E) (trans-1,3,3,3-tetrafluoroprop-1-ene) binary mixture were measured using VTD densitometer, Anton Paar DMA 512, in the gas, liquid and supercritical phases. Four compositions of mixtures: 21.3% CO₂+ 78.7% R1234ze(E), 40% CO₂+ 60% R1234ze(E), 59.6% CO₂+ 40.6% R1234ze(E) and 79.4% CO₂+ 20.6% R1234ze(E) were studied at seven temperatures between 283.32 K and 353.02 K and pressures up to 10 MPa. The data were well correlated using the Peng-Robinson cubic equation of State using the Wong Sandler mixing rules involving the NRTL activity coefficient model, and the fundamental Helmholtz equation of state using the Kunz and Wagner mixing rules involving Helmholtz energy. The experimental and correlated phase compositions were compared. Both two models were adjusted on the VLE data, but the Helmholtz model is more accurate to the prediction of density than the Peng-Robinson model.

使用VTD密度计Anton Paar DMA 512在气相，液相和超临界相中测量CO ₂ -R1234ze（E）（反式1,3,3,3-四氟丙-1-烯）二元混合物的密度。混合物的四种组成：21.3％CO ₂ + 78.7％R1234ze（E），40％CO ₂ + 60％R1234ze（E），59.6％CO ₂ + 40.6％R1234ze（E）和79.4％CO ₂在283.32 K和353.02 K之间的七个温度和最高10 MPa的压力下研究了+ 20.6％R1234ze（E）。数据通过使用涉及NRTL活度系数模型的Wong Sandler混合规则的Peng-Robinson立方状态方程和使用涉及亥姆霍兹能量的Kunz和Wagner混合规则的基本亥姆霍兹状态方程进行了很好的相关。比较了实验相和相关相的组成。两种模型都在VLE数据上进行了调整，但Helmholtz模型比Peng-Robinson模型更准确地预测密度。