A new unified model to simulate columns with multiple phase divisions and their impact on energy savings

Autor(es)

Biasi, Lilian C. K. ^[1] ; Heinkenschloss, Matthias ^[2] ; Batista, Fabio R. M. ^[3] ; Zemp, Roger J. ^{[4, 5]} ; Romano, Ana L. R. ^[1] ; Meirelles, Antonio J. A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Food Engn, Dept Food Engn, UNICAMP, Lab Extract Appl Thermodynam & Equilibrium, ExTrAE, BR-13083862 Campinas, SP - Brazil

^[2] Rice Univ, Dept Computat & Appl Math, Houston, TX 77005 - USA

^[3] Univ Sao Paulo, Sch Engn Lorena, Dept Chem Engn, BR-2602810 Lorena, SP - Brazil

^[4] Univ Estadual Campinas, Dept Chem Syst Engn, UNICAMP, BR-13083862 Campinas, SP - Brazil

^[5] Univ Estadual Campinas, Sch Chem Engn, UNICAMP, BR-13083862 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Computers & Chemical Engineering; v. 140, SEP 2 2020.
• Citações Web of Science: 0

Resumo

This paper presents a new unified model that allows the simulation of distillation columns with any integer number of phase divisions. Such columns have the potential for substantial savings in energy and capital costs. However, conventional simulators do not cover columns with phase divisions and previous simulations required a tailored algorithm for each type of column. The proposed model uses a unique set of MESH-equations for parastillation, metastillation, and conventional distillation. With small modifications in the stage indexing, the model allows the simulation of conventional, top and bottom-DWCs. This generalization was possible by introducing two new variables: the number of liquid (theta) and vapor (beta) phase divisions. The positive impact of increasing the number of phase divisions was demonstrated in the bioethanol distillation, by analyzing parastillation and metastillation columns. These columns reduce the operational and total annual costs in 19% and 15%, when compared to conventional columns. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 14/21252-0 - Equilíbrio e processos de produção de biocombustíveis e bioprodutos
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• Processo FAPESP: 16/10636-8 - Da fábrica celular à biorrefinaria integrada Biodiesel-Bioetanol: uma abordagem sistêmica aplicada a problemas complexos em micro e macroescalas
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