Detailed modeling of stationary and transient mass transfer across pervaporation membranes
Detailed modeling of stationary and transient mass transfer across pervaporation membranes
复制标题
跨渗透蒸发膜的稳态和瞬态传质的详细建模
DOI：
10.1002/aic.690470610
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发表时间：
2001
期刊：
影响因子：
3.7
通讯作者：
W. Marquardt
中科院分区：
文献类型：
--
作者：
J. Bausa;W. Marquardt
不同的作者已经报道了渗透汽化过程中传质的缓慢动力学行为。然而，到目前为止，只有很少的实验数据和模型能够描述这一现象。基于双重吸附理论、麦克斯韦-斯特凡扩散理论和UNIQUAC模型，提出了一种详细的渗透汽化传质模型。该模型能较好地描述稳态和瞬态传质过程。给出了两种不同的PVA/PAN膜用于乙醇/水分离的模型参数。该模型与稳态和动态实验数据吻合较好。
The slow dynamic behavior of mass transfer in pervaporation has been reported by different authors. Until now, however, only a little experimental data and no model capable to describe this phenomenon have been available. A new detailed model for mass transfer in pervaporation, based on the dual-sorption theory, Maxwell-Stefan diffusion, and the UNIQUAC model, is proposed. This model is capable of properly describing mass transfer at steady state and during transients. Model parameters for two different PVA/PAN membranes for ethanol/water separation are given. The model shows good agreement with both steady state and dynamic experimental data.