title: Methodology for the optimal design of an integrated first and second generation ethanol production plant combined with power cogeneration.
abstract: The application of methodologies for the optimal design of integrated processes has seen increased interest in literature. This article builds on previous works and applies a systematic methodology to an integrated first and second generation ethanol production plant with power cogeneration. The methodology breaks into process simulation, heat integration, thermo-economic evaluation, exergy efficiency vs. capital costs, multi-variable, evolutionary optimization, and process selection via profitability maximization. Optimization generated Pareto solutions with exergy efficiency ranging between 39.2% and 44.4% and capital costs from 210M$ to 390M$. The Net Present Value was positive for only two scenarios and for low efficiency, low hydrolysis points. The minimum cellulosic ethanol selling price was sought to obtain a maximum NPV of zero for high efficiency, high hydrolysis alternatives. The obtained optimal configuration presented maximum exergy efficiency, hydrolyzed bagasse fraction, capital costs and ethanol production rate, and minimum cooling water consumption and power production rate.
authors.affiliation: Process Modeling and Design, IFPEN, Insitut Français du Pétrole et des Energies Nouvelles, Rond Point de l'Echangeur de Solaize, BP3, 69360 Solaize, France. Electronic address: rami.bechara@etu.univ-lyon1.fr.
authors.forename: Rami
authors.initials: R
authors.lastname: Bechara
authors.affiliation: Process Modeling and Design, IFPEN, Insitut Français du Pétrole et des Energies Nouvelles, Rond Point de l'Echangeur de Solaize, BP3, 69360 Solaize, France. Electronic address: adrien.gomez@ifpen.fr.
authors.forename: Adrien
authors.initials: A
authors.lastname: Gomez
authors.affiliation: Economics and Information Watch and Management, IFPEN, 1-4 Avenue du Bois Préau, 92852 Rueil-Malmaison, France. Electronic address: valerie.saint-antonin@ifpen.fr.
authors.forename: Valérie
authors.initials: V
authors.lastname: Saint-Antonin
authors.affiliation: Process Modeling and Design, IFPEN, Insitut Français du Pétrole et des Energies Nouvelles, Rond Point de l'Echangeur de Solaize, BP3, 69360 Solaize, France. Electronic address: jean-marc.schweitzer@ifpen.fr.
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Schweitzer
authors.affiliation: Industrial Process and Energy Systems Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL Valais Wallis, Rue de l'Industrie 17, CH-1951 Sion, Switzerland. Electronic address: francois.marechal@epfl.ch.
authors.forename: François
authors.initials: F
authors.lastname: Maréchal
mesh_terms: D004867:Equipment Design; D000431:Ethanol / Q000138:chemical synthesis*; D006868:Hydrolysis; D008962:Models, Theoretical; D011210:Power Plants
chemical_list: D000431:Ethanol
keywords: Evolutionary bi-objective multi-variable optimization; First and second generation ethanol production; Process modeling; Selection by profitability maximization: minimum cellulosic ethanol selling price