Systems in connection with hydrocarbons with dissolved carbon dioxide (CO₂) are widespread in various chemical and engineering applications such as Fischer–Tropsch (FT) synthesizes, carbon capture and storage (CCS) and enhanced oil recovery (EOR). The thermophysical properties are necessary for understanding and designing those relevant processes. In this work, the liquid viscosity, interfacial tension, thermal diffusivity and mutual diffusivity of n-tetradecane with dissolved CO₂ were investigated under macroscopic equilibrium from 323 to 473 K and over a pressure range up to 5.6 MPa. With a careful evaluation of the uncertainty, the average expanded uncertainty of liquid viscosity, surface tension, thermal diffusivity and mutual diffusivity was 2.9%, 2.4%, 11.4% and 4.4%, respectively. The liquid viscosity and interfacial tension decline when the pressure of the system or the mole fraction of CO₂ in the liquid phase increases. Empirical correlations were used to represent the liquid viscosity and interfacial tension with an absolute average deviation (AAD) of 2.8% and 0.2 mN·m ^− 1. A comparison of available liquid viscosity and interfacial tension from the literature were performed. In the overlapped temperature and pressure region, good agreement can be found. In terms of the thermal diffusivity, there is no obvious dependency on pressure. The mutual diffusivity decreases with pressure at 323 K, while the decline behavior cannot be observed above 323 K when taking the combined uncertainty into consideration. This work was expected to provide reliable and accurate fundamental thermophysical properties of liquid with dissolved gas systems in engineering and chemical processes.

与溶解二氧化碳（CO ₂）的烃有关的系统广泛用于各种化学和工程应用中，例如费托合成（FT）合成，碳捕集与封存（CCS）和提高采油率（EOR）。热物理性质对于理解和设计那些相关过程是必需的。在这项工作中，正十四烷与溶解的CO ₂的液体粘度，界面张力，热扩散率和相互扩散率在323至473 K的宏观平衡和高达5.6 MPa的压力范围内进行了研究。仔细评估不确定度后，液体粘度，表面张力，热扩散率和相互扩散率的平均扩展不确定度分别为2.9％，2.4％，11.4％和4.4％。当体系的压力或液相中CO ₂的摩尔分数增加时，液体粘度和界面张力降低。经验关系被用来表示所述液体的粘度和界面张力为2.8％和0.2的Mn的平均绝对偏差（AAD）·米 ^{-  1}。进行了文献中可用液体粘度和界面张力的比较。在重叠的温度和压力区域，可以找到很好的一致性。就热扩散率而言，对压力没有明显的依赖性。互扩散系数在323 K下随压力降低，而在考虑综合不确定性时，在323 K以上无法观察到下降行为。预期这项工作将为工程和化学过程中的溶解气体系统提供可靠且准确的液体基本热物理性质。