Surface tension of water/nitrogen and water–phenol/nitrogen systems was successfully measured by the hanging drop method in a wide domain of temperature (from 100 to 300°C) and pressure (from 4 to 30MPa), conditions little explored in litterature. Results show that surface tension of water–phenol mixtures decreases as phenol mass fraction increases. This decrease is observed under saturated and unsaturated conditions and is more pronounced at low temperatures and does not seem to depend on pressure. The effect of saturation on surface tension in the water/nitrogen system has been correlated with water vapor pressure by using experimental points with a great accuracy. For the water–phenol/nitrogen system, experimental data obtained with different mass fraction of phenol were correlated using Macleod‐Sugden equation for mixtures. © 2018 American Institute of Chemical Engineers © 2018 American Institute of Chemical Engineers AIChE J, 64: 4110–4117, 2018

中文翻译：

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高压和高温下气液表面张力的测量和相关性

水/氮和水-苯酚/氮系统的表面张力已通过悬滴法在温度（100至300°C）和压力（4至30MPa）的较宽范围内成功测量，文献中很少探讨这种条件。结果表明，水-苯酚混合物的表面张力随苯酚质量分数的增加而降低。这种降低在饱和和不饱和条件下观察到，并且在低温下更为明显，并且似乎不依赖于压力。通过使用高精度的实验点，饱和度对水/氮系统中表面张力的影响已与水蒸气压力相关联。对于水-酚/氮系统，使用Macleod-Sugden方程对混合物中不同质量分数的苯酚获得的实验数据进行关联。AIChE J，64：4110-4117，2018