Technoeconomic Assessment of a Biomass Pretreatment + Ionic Liquid Recovery Process with Aprotic and Choline Derived Ionic Liquids



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Ovejero Pérez, Antonio and Ayuso Sebastián, Miguel and Rigual Hernández, Victoria de los Ángeles and Domínguez Toribio, Juan Carlos and García González, Julián and Alonso Rubio, M. Virginia and Oliet Pala, Mercedes and Rodríguez Somolinos, Francisco (2021) Technoeconomic Assessment of a Biomass Pretreatment + Ionic Liquid Recovery Process with Aprotic and Choline Derived Ionic Liquids. ACS Sustainable Chemistry & Engineering, 9 (25). pp. 8467-8476. ISSN 2168-0485

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Ionic liquids have shown promising results in biomass pretreatment; however, an extensive water washing step is necessary. This fact increases not only the processing costs but also those associated with the ionic liquid recovery step. In this work, Eucalyptus globulus wood pretreated with two acetate-based ionic liquids, namely 1-ethyl-3-methylimidazolium acetate and choline acetate, has been washed with increasing volumes of water in order to analyze the influence of the amount of washing water used on the subsequent enzymatic hydrolysis stage and on the IL recovery costs. Vapor−liquid equilibria data of recovered ionic liquid/water mixtures have been determined to simulate the IL recovery step with Aspen Plus, calculating the operating costs using the Aspen Plus Economics Analyzer afterward. [Emim][OAc] was more efficiently washed and more effective toward wood pretreatment than [Ch][OAc]. Both IL/water systems were successfully modeled, and simulation studies showed that incremental volumes of water led to higher operating costs in the IL recovery step that are compensated with less IL makeup costs. Therefore, this work offers a technoeconomical analysis of the IL recovery step in a real biorefinery pretreatment process as a function of the volume of water used in the pretreated wood washing stage.

Item Type:Article
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CRUE-CSIC (Acuerdos Transformativos 2021)

Uncontrolled Keywords:Water washing step, Saccharification, Vapor−liquid equilibria, Thermodynamic modeling, Ionic liquid recovery simulation, Cost estimation
Subjects:Sciences > Chemistry > Chemical engineering
Sciences > Chemistry > Materials
ID Code:69337
Deposited On:21 Dec 2021 09:36
Last Modified:22 Feb 2022 10:50

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