NOVEL ENERGY-SAVING METHOD OF RECTIFICATION

Autor: Yu. V. Aristovich, A. Yu. Sokolov, Prashant Anil Tatake, John William Fulmer, Chandrasekhar Krishnan, V. Yu. Aristovich, M. V. Ramani
Rok vydání: 2004
Předmět:
Zdroj: Chemical Engineering Communications. 191:844-859
ISSN: 1563-5201
0098-6445
DOI: 10.1080/00986440490275985
Popis: 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....
Databáze: OpenAIRE
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