Thermodynamic analysis, synthesis, characterization, and evaluation of 1-ethyl-3-methylimidazolium chloride: Study of its effect on pretreated rice husk

doi:10.1016/j.cjche.2023.02.023

中国化学工程学报 ›› 2023, Vol. 60 ›› Issue (8): 143-154.DOI: 10.1016/j.cjche.2023.02.023

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Thermodynamic analysis, synthesis, characterization, and evaluation of 1-ethyl-3-methylimidazolium chloride: Study of its effect on pretreated rice husk

Eileen Katherine Coronado-Aldana¹, Cindy Lizeth Ferreira-Salazar¹, Nubia Yineth Piñeros-Castro¹, Rubén Vázquez-Medina², Felipe A. Perdomo³

1. Universidad de Bogotá Jorge Tadeo Lozano, Facultad de Ciencias Naturales e Ingeniería, Cra. 4 22-61, Cundinamarca, Bogotá, Colombia;
2. Instituto Politecnico Nacional, CICATA Queretaro, Cerro Blanco 141, Colinas del Cimatario, 76090 Queretaro, Mexico;
3. School of Engineering, University of Edinburgh, Edinburgh EH9 3FB, United Kingdom

收稿日期:2022-07-30 修回日期:2023-02-13 出版日期:2023-08-28 发布日期:2023-10-28
通讯作者: Rubén Vázquez-Medina,E-mail:ruvazquez@ipn.mx;Felipe A. Perdomo,E-mail:fperdomo@ed.ac.uk
基金资助:
The authors thank the research program of Universidad de Bogotá Jorge Tadeo Lozano 703-12-15 for financial support.

Thermodynamic analysis, synthesis, characterization, and evaluation of 1-ethyl-3-methylimidazolium chloride: Study of its effect on pretreated rice husk

Eileen Katherine Coronado-Aldana¹, Cindy Lizeth Ferreira-Salazar¹, Nubia Yineth Piñeros-Castro¹, Rubén Vázquez-Medina², Felipe A. Perdomo³

1. Universidad de Bogotá Jorge Tadeo Lozano, Facultad de Ciencias Naturales e Ingeniería, Cra. 4 22-61, Cundinamarca, Bogotá, Colombia;
2. Instituto Politecnico Nacional, CICATA Queretaro, Cerro Blanco 141, Colinas del Cimatario, 76090 Queretaro, Mexico;
3. School of Engineering, University of Edinburgh, Edinburgh EH9 3FB, United Kingdom

Received:2022-07-30 Revised:2023-02-13 Online:2023-08-28 Published:2023-10-28
Contact: Rubén Vázquez-Medina,E-mail:ruvazquez@ipn.mx;Felipe A. Perdomo,E-mail:fperdomo@ed.ac.uk
Supported by:
The authors thank the research program of Universidad de Bogotá Jorge Tadeo Lozano 703-12-15 for financial support.

摘要/Abstract

摘要： This work is focused on the determination of the optimal reaction conditions to synthesize the ionic liquid 1-ethyl-3-methylimidazolium chloride ([EMIM][Cl]) and assess its suitability for the pretreatment of rice husk. The modified UNIFAC (UNIversal quasi-chemical Functional-group Activity Coefficients) approach for ionic liquids is used to develop a thermodynamic model that describes the reactive system methylimidazole (MIM), chloroethane (C₂H₅Cl) and [EMIM][Cl]. The model allows to study the phase equilibria coexistence (vapor-liquid equilibria and solid-liquid equilibria) and yields the theoretically optimal conditions to synthesize the ionic liquid. The model predictions are validated with the available experimental and reported data. By implementing the developed model, a simple way to synthesize ionic liquid [EMIM][Cl] was found allowing to study its influence on the structure and morphology of pretreated rice husk. The lignocellulosic materials involved in this study are characterized by their composition, enzymatic digestibility, scanning electron microscopy, and crystallinity. Compared to untreated material, [EMIM][Cl]-pretreated rice husk produces cellulose that can be efficiently enzymatic hydrolyzed with high sugar yields. This work offers a suitable methodology to include the synthesis and thermodynamics of the solvent media within the design of low-cost ionic liquids for lignocellulosic biomass pretreatment.

关键词: Ionic liquids, Fluid-phase equilibria, Thermodynamics, Waste treatment, UNIFAC approach

Abstract: This work is focused on the determination of the optimal reaction conditions to synthesize the ionic liquid 1-ethyl-3-methylimidazolium chloride ([EMIM][Cl]) and assess its suitability for the pretreatment of rice husk. The modified UNIFAC (UNIversal quasi-chemical Functional-group Activity Coefficients) approach for ionic liquids is used to develop a thermodynamic model that describes the reactive system methylimidazole (MIM), chloroethane (C₂H₅Cl) and [EMIM][Cl]. The model allows to study the phase equilibria coexistence (vapor-liquid equilibria and solid-liquid equilibria) and yields the theoretically optimal conditions to synthesize the ionic liquid. The model predictions are validated with the available experimental and reported data. By implementing the developed model, a simple way to synthesize ionic liquid [EMIM][Cl] was found allowing to study its influence on the structure and morphology of pretreated rice husk. The lignocellulosic materials involved in this study are characterized by their composition, enzymatic digestibility, scanning electron microscopy, and crystallinity. Compared to untreated material, [EMIM][Cl]-pretreated rice husk produces cellulose that can be efficiently enzymatic hydrolyzed with high sugar yields. This work offers a suitable methodology to include the synthesis and thermodynamics of the solvent media within the design of low-cost ionic liquids for lignocellulosic biomass pretreatment.

Key words: Ionic liquids, Fluid-phase equilibria, Thermodynamics, Waste treatment, UNIFAC approach

Eileen Katherine Coronado-Aldana, Cindy Lizeth Ferreira-Salazar, Nubia Yineth Piñeros-Castro, Rubén Vázquez-Medina, Felipe A. Perdomo. Thermodynamic analysis, synthesis, characterization, and evaluation of 1-ethyl-3-methylimidazolium chloride: Study of its effect on pretreated rice husk[J]. 中国化学工程学报, 2023, 60(8): 143-154.

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Thermodynamic analysis, synthesis, characterization, and evaluation of 1-ethyl-3-methylimidazolium chloride: Study of its effect on pretreated rice husk

Thermodynamic analysis, synthesis, characterization, and evaluation of 1-ethyl-3-methylimidazolium chloride: Study of its effect on pretreated rice husk

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