Distillation in hollow fibers
Distillation in hollow fibers
复制标题
DOI：
10.1002/aic.690490910
复制
发表时间：
2003-09-01
期刊：
影响因子：
3.7
通讯作者：
Cussler, EL
中科院分区：
文献类型：
--
作者：
Zhang, GL;Cussler, EL
在中空纤维中蒸馏比在随机或结构化填料中蒸馏能得到更好、更高效的分离。由于所使用的中空纤维对传质的阻力很小，因此分离的选择性取决于相对挥发性，就像在传统蒸馏中一样。因为纤维是无孔的，蒸馏可以在高流量下进行，而高流量通常会导致水淹，而低流量通常会损害负载。因此，降压比几乎是无限的，传输单元的高度可以尽可能小。虽然由于材料的限制，中空纤维蒸馏的实际价值还不确定，但实验结果与其他膜组件的相关性一致。
Distillation in hollow fibers can give better, more productive separations than distillation in random or structured packing. Since the hollow fibers used have little resistance to mass transfer, the selectivity of the separation depends on the relative volatility, just as in conventional distillation. Because the fibers are nonporous, the distillation can operate at high flows which normally cause flooding, and at low flows which normally compromise loading. As a result, the turndown ratio is nearly infinite and the height of a transfer unit can be as small as desired. Experiments do give values consistent with correlations developed for other membrane modules, although the practical value of hollow fiber distillation is uncertain because of the materials limitations.