Thermal and Physical Properties of CO2-Reactive Binary Mixtures

Eda Cagli; Harrison Liu; Vaishali Khokhar; Aidan Klemm; Burcu E. Gurkan

doi:10.1021/acs.jced.3c00653

Thermal and Physical Properties of CO₂-Reactive Binary Mixtures

Eda Cagli, Harrison Liu, Vaishali Khokhar, Aidan Klemm, Burcu E. Gurkan

Research output: Contribution to journal › Article › peer-review

Abstract

Binary solvent mixtures based on 1-ethyl-3-methylimidazolium 2-cyanopyrrolide, [EMIM][2-CNpyr], an ionic liquid (IL), and a series of hydrogen bond donors (HBDs) including ethylene glycol (EG), propylene glycol (PG), and monoethanolamine (MEA) were characterized in terms of temperature-dependent densities and viscosities along with their thermal stability and CO₂ absorption-desorption capability. NMR and FTIR were employed to observe the effect of the IL/HBD composition on intermolecular interactions. Among the investigated mixtures, IL/EG (1:2) showed the most efficient absorption-desorption performance and thermal stability. Though IL/PG and IL/EG had similar CO₂ absorption capacities, the IL/PG exhibited the highest viscosity, which limited the CO₂ transport in the solvent. The IL/MEA solvent possesses significant CO₂ absorbance capability; however, the strong binding energy between MEA and CO₂ and the increased viscosity during absorption led to difficulties in CO₂ desorption. This study highlights the modification of intermolecular interactions in IL/HBD binary mixtures with respect to the choice of HBDs, reflected by their distinct physical properties and CO₂ binding behavior.

Original language	English
Pages (from-to)	2676-2687
Number of pages	12
Journal	Journal of Chemical and Engineering Data
Volume	69
Issue number	8
DOIs	https://doi.org/10.1021/acs.jced.3c00653
State	Published - Aug 8 2024
Externally published	Yes

Funding

This study was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Chemical Sciences, Geosciences, & Biosciences (CSGB) Division under award number DE-SC0022214. The authors would like to thank Ruth Dikki and Muhammad Zeeshan for their assistance in thermal analysis and the Northeast Ohio High Field NMR Facility for access to the NMR instrument.

Funders	Funder number
Chemical Sciences, Geosciences, & Biosciences
Basic Energy Sciences
U.S. Department of Energy
Office of Science
Chemical Sciences, Geosciences, and Biosciences Division	DE-SC0022214
Chemical Sciences, Geosciences, and Biosciences Division

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title = "Thermal and Physical Properties of CO2-Reactive Binary Mixtures",

abstract = "Binary solvent mixtures based on 1-ethyl-3-methylimidazolium 2-cyanopyrrolide, [EMIM][2-CNpyr], an ionic liquid (IL), and a series of hydrogen bond donors (HBDs) including ethylene glycol (EG), propylene glycol (PG), and monoethanolamine (MEA) were characterized in terms of temperature-dependent densities and viscosities along with their thermal stability and CO2 absorption-desorption capability. NMR and FTIR were employed to observe the effect of the IL/HBD composition on intermolecular interactions. Among the investigated mixtures, IL/EG (1:2) showed the most efficient absorption-desorption performance and thermal stability. Though IL/PG and IL/EG had similar CO2 absorption capacities, the IL/PG exhibited the highest viscosity, which limited the CO2 transport in the solvent. The IL/MEA solvent possesses significant CO2 absorbance capability; however, the strong binding energy between MEA and CO2 and the increased viscosity during absorption led to difficulties in CO2 desorption. This study highlights the modification of intermolecular interactions in IL/HBD binary mixtures with respect to the choice of HBDs, reflected by their distinct physical properties and CO2 binding behavior.",

author = "Eda Cagli and Harrison Liu and Vaishali Khokhar and Aidan Klemm and Gurkan, {Burcu E.}",

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AU - Cagli, Eda

AU - Liu, Harrison

AU - Khokhar, Vaishali

AU - Klemm, Aidan

AU - Gurkan, Burcu E.

PY - 2024/8/8

Y1 - 2024/8/8

N2 - Binary solvent mixtures based on 1-ethyl-3-methylimidazolium 2-cyanopyrrolide, [EMIM][2-CNpyr], an ionic liquid (IL), and a series of hydrogen bond donors (HBDs) including ethylene glycol (EG), propylene glycol (PG), and monoethanolamine (MEA) were characterized in terms of temperature-dependent densities and viscosities along with their thermal stability and CO2 absorption-desorption capability. NMR and FTIR were employed to observe the effect of the IL/HBD composition on intermolecular interactions. Among the investigated mixtures, IL/EG (1:2) showed the most efficient absorption-desorption performance and thermal stability. Though IL/PG and IL/EG had similar CO2 absorption capacities, the IL/PG exhibited the highest viscosity, which limited the CO2 transport in the solvent. The IL/MEA solvent possesses significant CO2 absorbance capability; however, the strong binding energy between MEA and CO2 and the increased viscosity during absorption led to difficulties in CO2 desorption. This study highlights the modification of intermolecular interactions in IL/HBD binary mixtures with respect to the choice of HBDs, reflected by their distinct physical properties and CO2 binding behavior.

AB - Binary solvent mixtures based on 1-ethyl-3-methylimidazolium 2-cyanopyrrolide, [EMIM][2-CNpyr], an ionic liquid (IL), and a series of hydrogen bond donors (HBDs) including ethylene glycol (EG), propylene glycol (PG), and monoethanolamine (MEA) were characterized in terms of temperature-dependent densities and viscosities along with their thermal stability and CO2 absorption-desorption capability. NMR and FTIR were employed to observe the effect of the IL/HBD composition on intermolecular interactions. Among the investigated mixtures, IL/EG (1:2) showed the most efficient absorption-desorption performance and thermal stability. Though IL/PG and IL/EG had similar CO2 absorption capacities, the IL/PG exhibited the highest viscosity, which limited the CO2 transport in the solvent. The IL/MEA solvent possesses significant CO2 absorbance capability; however, the strong binding energy between MEA and CO2 and the increased viscosity during absorption led to difficulties in CO2 desorption. This study highlights the modification of intermolecular interactions in IL/HBD binary mixtures with respect to the choice of HBDs, reflected by their distinct physical properties and CO2 binding behavior.

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Thermal and Physical Properties of CO₂-Reactive Binary Mixtures

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