Supplementary data: VLE, density and flash-separation dataset for CO2 + O2 equation-of-state comparison

This dataset contains the full numerical data comparing six equations of state (PR, SRK, GERG-2008, EoS-CG-2021, PC-SAFT, and a Hybrid PC-SAFT/EoS-CG formulation) for the CO2 + O2 binary system in the context of CO2/O2 separation from oxy-fuel combustion engines. The data are organised in six folders, one per figure family: (1) VLE isotherms and error statistics, (2) composition parity points, (3) density isotherms and model-vs-experiment deviations, (4) computational cost per EoS, (5) critical-pressure locus, and (6) single- and two-stage flash separation performance. Files are tab-separated (.tsv) with column headers and units on the first line. Experimental VLE data (354 points, 218-298 K, up to ~14 MPa) are compiled from eight literature sources, and experimental densities from Ahamada et al. (2020); all sources are individually referenced in the README.本数据集包含完整数值数据，用于对比六种状态方程（PR、SRK、GERG-2008、EoS-CG-2021、PC-SAFT及混合PC-SAFT/EoS-CG配方）在氧燃料燃烧发动机CO₂/O₂分离场景下，对CO₂+O₂二元体系的性能表现。 数据按六个文件夹分类存储，每个文件夹对应一类图组：(1) 气液平衡（Vapor-Liquid Equilibrium，VLE）等温线与误差统计量；(2) 组成配对点；(3) 密度等温线与模型-实验偏差；(4) 单种状态方程的计算成本；(5) 临界压力轨迹；(6) 单级与两级闪蒸分离性能。所有文件均为制表符分隔格式（.tsv），首行包含列标题与单位信息。 实验气液平衡数据共包含354个测点，温度覆盖218~298 K，最高压力约14 MPa，汇编自8篇公开文献；实验密度数据来自Ahamada等人2020年的研究；所有文献来源均在README文件中单独标注。