不可逆热力学分离过程理论

Theory of Separation Processes based on Irreversible Thermodynamics

将热力学原理和理论扩展到不可逆过程 ,形成不可逆热力学理论 ,并应用于扩散传质分离过程 ,建立不可逆热力学分离过程理论 ,其核心为描述多组分物系组分间相对运动的普遍化麦克斯韦尔 -斯蒂芬方程。该理论可合理地解释一些传质“奇异”现象 ,计算非理想物系传质扩散系数 ,预测多组分分离过程的传质速率和级效率 ,其模拟计算结果与实验测定值能很好地吻合。不考虑组分间的交互作用 ,视各组分效率相等的模型计算结果与实验测定值存在偏差 ,物系的非理想程度越大 ,偏差越大。

Theory of Irreversible Thermodynamics(IT) is used to develop the fundamental basis for separation processes,the core of the theory is the Generalized Maxwell Stefan(GMS) equations for describing the relative motion of species in a multicomponent mixture.The IT approach and formulations can be applied to reasonably explain some curious mass transfer phenomena and to estimate the mass diffusivities of thermodynamically non ideal fluid mixtures and to predict mass transfer rates and stage efficiencies in multicomponent separation processes.The result of the calculation of IT model is in good agreement with the measured values of experiments.