Behnejad Hassan, Cheshmpak Hashem, Jamali Asma
Acta Chim Slov. 2015;62(4):754-60.
The thermodynamic behavior of the simple binary mixtures in the vicinity of critical line has a universal character and can be mapped from pure components using the isomorphism hypothesis. Consequently, based upon the principle of isomorphism, critical phenomena and similarity between P-ρ-T and T-η-(viscosity)-P relationships, the viscosity model has been developed adopting two cubic, Soave-Redlich-Kwong (SRK) and Peng-Robinson (PR), equations of state (EsoS) for predicting the viscosity of the binary mixtures. This procedure has been applied to the methane-butane mixture and predicted its viscosity data. Reasonable agreement with the experimental data has been observed. In conclusion, we have shown that the isomorphism principle in conjunction with the mapped viscosity EoS suggests a reliable model for calculating the viscosity of mixture of hydrocarbons over a wide pressure range up to 35 MPa within the stated experimental errors.
简单二元混合物在临界线附近的热力学行为具有普适性，可根据同构假说从纯组分进行映射。因此，基于同构原理、临界现象以及P-ρ-T和T-η-（粘度）-P关系之间的相似性，采用两个立方型状态方程，即Soave-Redlich-Kwong（SRK）方程和Peng-Robinson（PR）方程，开发了用于预测二元混合物粘度的粘度模型。该方法已应用于甲烷-丁烷混合物，并预测了其粘度数据。观察到与实验数据有合理的一致性。总之，我们已经表明，同构原理与映射的粘度状态方程相结合，在规定的实验误差范围内，为计算高达35MPa的宽压力范围内的烃类混合物粘度提供了一个可靠的模型。
