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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Double-effect distillation and thermal integration applied to the ethanol production process

Full text
Author(s):
Palacios-Bereche, Reynaldo [1] ; Ensinas, Adriano V. [1, 2] ; Modesto, Marcelo [1] ; Nebra, Silvia A. [1, 3]
Total Authors: 4
Affiliation:
[1] Fed Univ ABC, CECS UFABC, Ctr Engn Modelling & Social Sci, BR-09210580 Santo Andre, SP - Brazil
[2] Ecole Polytech Fed Lausanne, STI IGM IPESE, CH-1015 Lausanne - Switzerland
[3] Univ Estadual Campinas, UNICAMP, NIPE, Interdisciplinary Ctr Energy Planning, BR-13083896 Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: ENERGY; v. 82, p. 512-523, MAR 15 2015.
Web of Science Citations: 26
Abstract

A double-effect distillation system allows a significant reduction in energy consumption, since the condensers and reboilers of different columns can be integrated thermally. To achieve this goal, some columns operate under a vacuum, while others operate close to atmospheric pressure. These pressure levels bring about different temperature levels, allowing energy recovery. Thus, the aim of this study is to assess the incorporation of double-effect distillation in ethanol production, and its impact on energy consumption and electricity surplus production in the cogeneration system. Moreover, because double-effect distillation and thermal integration involve an increase in equipment costs, an economic assessment was done. Several cases were evaluated and a thermal integration technique was applied, in order to integrate the overall process. The thermal integration study showed that it is possible to integrate the juice concentration step (multiple effect evaporation system) in the overall process without additional thermal consumption, through the selection of a suitable set of pressures in the evaporation system. The results showed a reduction in steam consumption of between 17% and 54%, in comparison with the Base Case. Regarding the electricity surplus, this increased by up to 22% when extraction condensing steam turbines were adopted. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 11/51902-9 - Simulation of 1st generation sugarcane biorefinery in EMSO platform
Grantee:Antonio Maria Francisco Luiz Jose Bonomi
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Thematic Grants
FAPESP's process: 11/05718-1 - Production of second generation biofuels from sugar cane - Modeling and energetic and exergetic assessment of the integrated process.
Grantee:Reynaldo Palacios Bereche
Support Opportunities: Scholarships in Brazil - Post-Doctoral