Distillation Columns Containing Structured Packings: A Comprehensive Model for Their Performance. 2. Mass-Transfer Model
Distillation Columns Containing Structured Packings: A Comprehensive Model for Their Performance. 2. Mass-Transfer Model
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DOI：
10.1021/ie940406i
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发表时间：
1996-05
影响因子：
4.2
通讯作者：
J. A. Rocha;J. Bravo;J. Fair
中科院分区：
文献类型：
--
作者：
J. A. Rocha;J. Bravo;J. Fair
这是一篇由两部分组成的论文的第二部分，内容涉及精馏塔用规整填料中的流体力学和传质。第一部分阐述了压降、溢流和持液率。第二部分包括有效界面面积的产生，并提供了作为表面类型、填料几何形状、相流条件和流体性质的函数来预测传质效率的一般关联式。传质模型已经在各种商业规整填料上进行了测试，蒸馏压力从0.33巴到20.4巴不等。在所有情况下，数据的拟合度都很好，可能的例外是最高压力，轴向混合的附加因素似乎有影响。
This is the second part of a two-part paper dealing with the fluid mechanics and mass transfer in structured packings for distillation column service. The first part elucidated pressure drop, flooding, and liquid holdup. The second part covers the generation of effective interfacial area and provides a general correlation for predicting the mass-transfer efficiency as a function of surface type, packing geometry, phase flow conditions, and fluid properties. The mass-transfer model has been tested against a variety of commercial structured packings, for distillation pressures ranging from 0.33 to 20.4 bar. In all cases the fit of the data is excellent, with the possible exception of the highest pressures, where additional factors of axial mixing appear to have an effect.