The viscosity of dense fluid mixtures of carbon dioxide and ethanol was determined from the pressure drop between the inlet and outlet of a packed bed using the Ergun equation at temperatures from 313.2 K to 343.2 K and pressures from 15 MPa to 30 MPa over the entire range of ethanol composition. The values for the fluid mixtures decreased with increasing temperature and increased with increasing pressure under isocratic conditions. In addition, the values measured with Ergun eq. were correlated with the equation combining the Eyring theory and the perturbed chain statistical associating fluid theory equation of state (PC-SAFT EoS) and with that based on the rough hard-sphere (RHS) model proposed by Dymond and Assael. The accuracies of the Eyring + PC-SAFT EoS and the RHS model were 8.7% and 12%, respectively, in terms of average relative deviation for 80 conditions over the entire range of ethanol composition.

中文翻译：

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二氧化碳和乙醇的稠密流体混合物在 313–343 K 和 15–30 MPa 下的粘度测量和关联

二氧化碳和乙醇的稠密流体混合物的粘度是根据填充床入口和出口之间的压降，在整个范围内使用 Ergun 方程在 313.2 K 至 343.2 K 的温度和 15 MPa 至 30 MPa 的压力下确定的乙醇组合物。在等度条件下，流体混合物的值随着温度的升高而降低，并随着压力的升高而升高。此外，用额尔古纳方程测量的值。与 Eyring 理论和扰动链统计关联流体理论状态方程 (PC-SAFT EoS) 相结合的方程以及 Dymond 和 Assael 提出的基于粗糙硬球 (RHS) 模型的方程进行了相关。就整个乙醇成分范围内 80 种条件的平均相对偏差而言，Eyring + PC-SAFT EoS 和 RHS 模型的准确度分别为 8.7% 和 12%。