The isothermal vapor + liquid equilibria of carbon dioxide + (E)-2-hexenal (a key apple aroma) was measured using a visual equilibrium cell with an analytic methodology. The selected isotherms were (313.2, 323.2 and 333.2) K, and the pressures assessed ranged from (2.2 to 9.8) MPa. The thermodynamic consistency of the experimental data was verified, and the uncertainties of the molar fractions of the vapor and liquid phases were estimated. The density and dynamic viscosity of pure (E)-2-hexenal were measured at 101.13 kPa and temperatures from (292.2 to 353.2) K. Two equations of state were selected to model the vapor + liquid equilibria. The Peng-Robinson with two different mixing rules, and the Perturbed Chain - Statistical Associating Fluid Theory. The phase envelopes showed a critical pressure, detected at carbon dioxide molar fractions ≥ 95 % mol·mol^-1.

使用视觉平衡池和分析方法测量了等温蒸气+二氧化碳的液态平衡+（E）-2-己烯（一种关键的苹果香气）。选定的等温线为（313.2、323.2和333.2）K，评估的压力范围为（2.2至9.8）MPa。验证了实验数据的热力学一致性，并估计了气相和液相摩尔分数的不确定性。在101.13 kPa和（292.2至353.2）K的温度下测量了纯的（E）-2-己烯醛的密度和动态粘度。选择了两个状态方程来模拟蒸气+液体平衡。具有两种不同混合规则的Peng-Robinson，以及扰动链-统计关联流体理论。相包络显示出临界压力，^-1。