MELO, D. N. C.; http://lattes.cnpq.br/3610603048189953; MELO, Delba Nisi Cosme.
Résumé:
One of the greatest commercial interests of azeotropic mixtures is
ethanol-water. Consequently, extractive distillation appears as a method of
separation for this kind of mixture, regarding its simple operation with a good
extractive agent. The excessive use of energy in a distillation column points
forward the investigation alternative ways of economy. The purpose of this
simulation work, using Hysim, is to optimize an anhidrous ethanol production
unit regarding a model case (sequencial columns) and a suggested case
(energetical integration), establishing an evaluation and optimization of the
most significants parameters for each column, trying to minimize the energy
consumption. Sensitivity of some parameters as: concentration of ethanol in the
feed, solvent ratio, positions double of the feeding and purity of the final
product, as also its influences in the energy consumption was evaluated. The
viability of the technique of energy integration was also analyzed comparing
the temperature, total outflow of liquid and vapor and composition profiles for
the model and suggest cases. The results show that an optmized unity can
reduce the use of energy in about 20% regarding instalation conditions. With
an energetic integration scheme, an economy of 33% is obtained comparing to
the energy required by the optimized unity without termical integration.