Continuing our study on (CO₂ + O₂) mixtures, this work reports new experimental (p, ρ, T) data for two oxygen-rich mixtures with mole fractions x(O₂) = (0.50 and 0.75) mol·mol⁻¹, in the temperature range T = (250–375) K and pressure range p = (0.5–20) MPa, using a single-sinker densimeter. Experimental density data were compared to two well-established equation-of-state models: EOS-CG and GERG-2008. In the p, T-range investigated, the EOS-CG gave a better reproduction for the equimolar mixture (x(O₂) = 0.5), whereas the GERG-2008 performed significantly better for the oxygen-rich mixture (x(O₂) = 0.75). The EOS-CG generally overestimates the density, while the GERG-2008 underestimates it. This complete set of new experimental data, together with previous measurements, is used to calculate the virial coefficients B(T, x) and C(T, x), as well as the second interaction virial coefficient B₁₂(T) for the (CO₂ + O₂) system.

继续我们的研究（CO ₂ + O ₂）的混合物，此工作报告新的实验（p，ρ，Ť）数据两富氧混合物，其摩尔分数X（O ₂）=（0.50和0.75）摩尔·摩尔^{- 1}，在温度范围T =（250–375）K，压力范围p =（0.5–20）MPa下，使用单沉密度计。将实验密度数据与两个公认的状态方程模型进行了比较：EOS-CG和GERG-2008。在研究的p，T范围内，EOS-CG对等摩尔混合物（x（O₂）= 0.5），而GERG-2008在富氧混合物中的表现要好得多（x（O ₂）= 0.75）。EOS-CG通常会高估密度，而GERG-2008会低估密度。这套完整的新实验数据以及之前的测量结果用于计算病毒系数B（T，x）和C（T，x）以及（）的第二个相互作用病毒系数B ₁₂（T）。 CO ₂ + O ₂）系统。