A simultaneous heat and mass transfer model was applied to a binary system m a 3-m dtstdlatlon column packed with i m Raschlg Rings Mass transfer coefficients were obtained by measunng composmons and temperatures as functions of column height through use of the "dlfferentlal height" technique The ex
Liquid phase mass transfer resistance in a small scale packed distillation column
โ Scribed by K.J. Arwikar; O.C. Sandall
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 701 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0009-2509
No coin nor oath required. For personal study only.
โฆ Synopsis
A&tract
-Binary dlstdlatlon expenments usrng the toluen+tnchloroethylene system were conducted m a 3-m hameter column packed with 025m Raschlg rings In order to determine the hquld phase mass transfer charactenstlcs, gas absorption studies with COTwater system were also performed on the same column It was shown in both cases that end-effects can be effecbvely removed by usmg a "dtierenhal height" technique It was observed in the dlstdlatlon expenments that the hqmd phase was saturated, mdlcatmg a neghsble resistance to mass transfer m the hqmd Results from the absorption expenments indicate that this resistance IS small but not neghgtble
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## Ah&act -In packed columns large differences occur in the wetting of the particles and especially in the refreshing of the liquid 011 the wetted particles due to gradients in surface tension of the liquid/gas interface. Mass transfer rates may die, with a factor 2. In a column packed with Berl s
## Abstract The pressure drop and mass transfer efficiency for twoโphase flow in a structured packed column were simulated using a commercial CFD package, CFX version 10. The distillation of the methanol/isopropanol system was carried out in a 0.073โm diameter column, with an element composed of a