Person:
Ovejero Pérez, Antonio

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First Name
Antonio
Last Name
Ovejero Pérez
URI
https://hdl.handle.net/20.500.14352/84193
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Químicas
Department
Ingeniería Química y de Materiales
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2020 - 20245
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Author: Domínguez Toribio, Juan Carlos ×

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Now showing 1 - 5 of 5
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    Project number: 48
    Integración vertical de un proyecto de diseño en el Grado en Ingeniería Química
    (2022) García González, Julián; Oliet Palá, María Mercedes; Alonso Rubio, María Virginia; Domínguez Toribio, Juan Carlos; Miranda Carreño, Rubén; Yustos Cuesta, Pedro; Toledo Gabriel, José Manuel; Guijarro Gil, María Isabel; Rigual Hernández, Victoria de los Ángeles; Ayuso Sebastián, Miguel Aythami; Ovejero Pérez, Antonio; Hopson Safatli, Cynthia Elizabeth; García Somoza, Noelia
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    Technoeconomic Assessment of a Biomass Pretreatment + Ionic Liquid Recovery Process with Aprotic and Choline Derived Ionic Liquids
    (ACS Sustainable Chemistry & Engineering, 2021) Ovejero Pérez, Antonio; Ayuso Sebastián, Miguel Aythami; Rigual Hernández, Victoria De Los Ángeles; Domínguez Toribio, Juan Carlos; García González, Julián; Alonso Rubio, María Virginia; Oliet Pala, María Mercedes; Rodríguez Somolinos, Francisco
    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.
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    Acidic depolymerization vs ionic liquid solubilization in lignin extraction from eucalyptus wood using the protic ionic liquid 1-methylimidazolium chloride
    (2020) Ovejero Pérez, Antonio; Rigual Hernández, Victoria De Los Ángeles; Domínguez Toribio, Juan Carlos; Alonso Rubio, María Virginia; Oliet Pala, María Mercedes; Rodríguez Somolinos, Francisco
    Protic ionic liquids have been proposed as effective solvents for the selective extraction of lignin from wood. In this work, the protic ionic liquid 1-methylimidazolium chloride has been used to extract lignin at different biomass loadings, temperatures, and times to understand the influence of treatment severity on the lignin dissolution mechanism. Themaximumlignin recovery (82.35 g lignin/100 g biomass lignin) was achieved at 10% (w/w) biomass loading, 135 °C, and 6 h. An increase in treatment severity leads to an acid cleavage of ether linkages, which increases the average molecular weight and thermal stability of lignins due to C-C repolymerization. HSQC-NMR analysis showed the effect of operating conditions on the predominant mechanismof lignin depolymerization. Atmild conditions, there is a preferential degradation of G units (the typical depolymerization mechanism of ionic liquid treatments); but at the most severe conditions, S units are predominantly removed, as usually occurs in acidic treatments. This work contributes to better understanding the different lignin extraction mechanisms occurring with a protic ionic liquid depending on different operating conditions.
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    Project number: PIMCD51/23-24
    Aplicación de la metodología de aprendizaje basada en casos para la resolución de problemas de optimización multiobjetivo en Ingeniería de Procesos
    (2024) Rigual Hernández, Victoria De Los Ángeles; Alonso Rubio, María Virginia; Domínguez Toribio, Juan Carlos; García González, Julián; García Sanchez, Beatriz; Guijarro Gil, María Isabel; Mateo Fernández, Sara; Oliet Pala, María Mercedes; Ovejero Pérez, Antonio; Toledo Gabriel, José Manuel; Verdiá Barbará, Pedro; Yustos Cuesta, Pedro; Rigual Hernández, Victoria De Los Ángeles
    El objetivo principal que se propuso para este proyecto era acercar a los estudiantes de tercero del Grado de Ingeniería Química a las tareas propias de un Ingeniero Químico en un entorno laboral real, abordando problemas que impliquen la optimización simultánea de varias variables en un proceso químico.
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    Project number: 375
    Elaboración de tutorías basadas en casos en la asignatura de Termodinámica Aplicada
    (2023) García González, Julián; Alonso Rubio, María Virginia; Ayuso Sebastián, Miguel Aythami; Domínguez Toribio, Juan Carlos; García Sánchez, Beatriz; García Somoza, Noelia; Guijarro Gil, María Isabel; Hopson Safatli, Cynthia Elizabeth; Mateo Fernández, Sara; Oliet Pala, María Mercedes; Ovejero Pérez, Antonio; Rigual Hernández, Victoria de los Angeles; Toledo Gabriel, José Manuel; Yustos Cuesta, Pedro