Distillation of methanol–water solution in hollow fibers

Non-porous hollow fibers were used as more excellent structured packing over normal packing in the distillation of methanol–water system. Due to their special geometry, a column with hollow fibers could easily work 3–10 times higher above the limit where flooding usually occurs in conventional cases...

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Bibliographic Details
Published in:Separation and purification technology 2007-08, Vol.56 (2), p.143-149
Main Authors: Zhang, Guoliang, Lin, Lan, Meng, Qin, Xu, Youyi
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Distillation
Exact sciences and technology
Heat and mass transfer. Packings, plates
Hollow fibers
Mass transfer coefficient
Methanol–water system
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Summary:Non-porous hollow fibers were used as more excellent structured packing over normal packing in the distillation of methanol–water system. Due to their special geometry, a column with hollow fibers could easily work 3–10 times higher above the limit where flooding usually occurs in conventional cases. A small height of transfer units at 8 cm and the overall mass-transfer coefficient K x based on the liquid-side at 2.3 × 10 −5 mol/cm 2 s were obtained experimentally. Compared with theoretical estimation from earlier studies, it was found that the liquid side was mostly responsible for the total resistance of mass transfer, which was similar to the conventional distillation process at low concentration, although mass transfer resistance in the membrane and the vapor could not be negligible.
ISSN:1383-5866
1873-3794
DOI:10.1016/j.seppur.2007.01.016