| Autor: |
ARISTOVICH, V.YU., ARISTOVICH, YU.V., SOKOLOV, A.YU., FULMER, J.W., CHANDRASEKHAR KRISHNAN, RAMANI, M.V., PRASHANT TATAKE |
| Předmět: |
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| Zdroj: |
Chemical Engineering Communications; Jun2004, Vol. 191 Issue 6, p844-859, 16p |
| Abstrakt: |
The conventional rectification method to separate and purify chemical mixtures has the disadvantage of being an energy-intensive unit operation. The innovative method proposed in this article employs vapor and liquid recycles to the trays that in turn reduce the reflux rate and vapor boil-up rate, resulting in energy reduction without compromising the separations. These findings were supported with examples of ethanol-water and butane-pentane system separations. With ethanol-water system, the experiments were conducted without overhead liquid recycle and using 16 and 5 vapor recycles. The energy saved was found to be 25-35% for 16 recycles and 20-30% for 5 recycles. Butane-pentane system was chosen as an example of industrial use of the proposed method. A liquid overhead reflux ratio of 0.5 (L/D) was used with vapor recycles, compared to a reflux ratio of 1.25 for the conventional separation without vapor recycles. This resulted in 30-35% saving in energy while giving the same productivity of the column. Butane-pentane separation was also simulated using a commercial process simulator (ASPEN © PLUS). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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