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| Titel: |
NOVEL ENERGY-SAVING METHOD OF RECTIFICATION |
| Auteur: |
Aristovich, V. Yu. Aristovich, Yu. V. Sokolov, A. Yu. Fulmer, J. W. Krishnan, Chandrasekhar Ramani, M. V. Tatake, Prashant |
| Verschenen in: |
Chemical engineering communications |
| Paginering: | Jaargang 191 (2004) nr. 6 pagina's 844-859 |
| Jaar: |
2004-06 |
| Inhoud: |
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). |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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