Unraveling the CO2 reaction mechanism in bio-based amino-acid ionic liquids by operando ATR-IR spectroscopy

Latini, G.; Signorile, Matteo; Crocellà, Valentina; Bocchini, Sergio; Pirri, Candido; Bordiga, Silvia

doi:10.1016/j.cattod.2018.12.050

Cited by 27 publications

(24 citation statements)

References 54 publications

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“…The spectra modifications after CO 2 exposition are a clear signal that all four IL-DMSO solutions undergo chemical modifications. [19] These results confirm that for all the four ILs Adv. In addition, a new signal appears at ≈1690 cm −1 (see line 2 in Figure 2a,c,d and line e in (b)), related to the formation of the carbamic acid species.…”

Section: Absorption In the [Cho] [Ala] [Cho][ser] [Cho][pro] And [supporting

confidence: 79%

“…[18,20,21] [Cl] and its titration procedure is very long. [19] [Cho][AA] ILs were obtained via ionic metathesis between potassium AA salts and [Cho][Cl] in ethanol. [19] [Cho][AA] ILs were obtained via ionic metathesis between potassium AA salts and [Cho][Cl] in ethanol.…”

Section: Synthesis Of the [Cho][aa] Ilsmentioning

confidence: 99%

“…To explain the reason for the AA precipitation it is worth to focus on the 2:1 stoichiometry absorption (Scheme 2a). [19] The temperatures at which the CO 2 On the other side, the carbamate formation produces an AA with a double negative charge.…”

Section: Absorption In the [Cho] [Ala] [Cho][ser] [Cho][pro] And [mentioning

confidence: 99%

“…choline (a proved nontoxic and biocompatible cation) [15][16][17] and amino acids (AAs, renewable, biodegradable, biocompatible, and naturally abundant anions). [19] In this study, the CO 2 absorption performance of four biobased TSILs for industrial flue gas treatment was investigated. [18] As an example, our recent study proved that solution in dimethyl sulfoxide (DMSO) of choline glycinate [Cho][Gly] and prolinate [Cho][Pro] have high equilibrium absorption capacity and molar efficiency at low relative pressure 0.2 bar.…”

Section: Introductionmentioning

confidence: 99%

“…Since every AA contains amine functionalities, AA‐based ILs (AAILs) are in principle optimal task‐specific anions to produce ILs for CO 2 absorption . As an example, our recent study proved that solution in dimethyl sulfoxide (DMSO) of choline glycinate [Cho][Gly] and prolinate [Cho][Pro] have high equilibrium absorption capacity and molar efficiency at low relative pressure 0.2 bar …”

Section: Introductionmentioning

confidence: 99%

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Enhanced CO₂ Absorption in Organic Solutions of Biobased Ionic Liquids

Davarpanah

Hernández

Latini

et al. 2019

Advanced Sustainable Systems

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and in the field of biomass conversion. Future applications for CO 2 separation technologies are presumed to be within the so-called carbon capture and utilization (CCU) route. [6][7][8] The idea is to exploit CO 2 as a raw material for further chemical or industrial use and, thus, to valorize it by recycling. In the long term, CCU aims the development of a circular economy concept with neutral carbon emissions.Absorption is one of the main techniques used for CO 2 capture, [9] it relies on either chemical or physical interactions between the solvent and the solute CO 2 . In physical absorption, intermolecular forces, such as Coulomb, Van-der-Waals or other dispersion forces dominate the solute-solvent interactions. In chemical absorption, CO 2 chemically reacts with the solvent molecules and forms covalent bonds. Due to their stoichiometric reaction with CO 2 , their CO 2 absorption capacity is very high even at low CO 2 partial pressures. Chemical absorption is particularly appropriate if CO 2 is to be recovered from flue gas streams with relatively low concentrations. The major advantages of chemical absorption processes are the high selectivity for CO 2 and the high achievable gas product purity.The most commonly used chemical absorbents are amines (15-60 wt%) in aqueous solutions (i.e., typical loading of 0.5 mol CO 2 /mol amine for monoethanolamine, MEA). Amines have some drawbacks like a high corrosion rate at high concentrations, the outlet purified gas contains a high-water amount, the energy demand for their regeneration is high and they suffer from high evaporation losses. [10] Indeed, the reverse chemical reaction requires considerable activation energy that is commonly supplied by increasing the temperature of the absorbent. When a volatile absorbent is used, it must be either condensed from the purified gas stream or replenished with the consequent rise of operative costs. Therefore, improvement of the absorption medium, e.g., decreasing the volatility without losing the high loading of the absorbent phase is the primary research interest in physical and chemical absorption technologies.Since the 1990s, low-melting salts have gained increasing interest for application as alternative absorbents in a wide field of chemical processes. For salts with melting points below 100 °C, the term ionic liquid (IL) has been coined. As ILs are built up from an organic cation and an inorganic or organic anion, there is a vast variety of possible structures. Over the last years, a plethora of ILs and their mixtures have been Solutions of biobased ionic liquids (ILs) for recovering CO 2 from industrial flue gas are investigated. Four CO 2 task-specific choline-based amino acids ([Cho][AA]): Alanine, Glycine, and, for the first time, Proline and Serine are tested. The drawbacks related to the high viscosity of these ILs are limited by applying dimethyl sulfoxide (DMSO) as a solvent, which is chosen because it is a polar aprotic liquid with a low toxicity, low vapor pressure, and relatively low price. The choline-based...

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Section: Absorption In the [Cho] [Ala] [Cho][ser] [Cho][pro] And [supporting

confidence: 79%

Section: Synthesis Of the [Cho][aa] Ilsmentioning

confidence: 99%

Section: Absorption In the [Cho] [Ala] [Cho][ser] [Cho][pro] And [mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Enhanced CO₂ Absorption in Organic Solutions of Biobased Ionic Liquids

Davarpanah

Hernández

Latini

et al. 2019

Advanced Sustainable Systems

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Enhanced CO₂ Detection Using Potentiometric Sensors Based on PIM‐1/DBU Imidazolate Membranes

Molino,

Ferraro,

Lettieri

et al. 2024

Advanced Sustainable Systems

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A novel potentiometric sensor for carbon dioxide (CO2) detection utilizing a composite membrane of Polymer of Intrinsic Microporosity (PIM‐1) and 18‐diazabicyclo[5.4.0]undec‐7‐ene imidazolate (DBU‐imidazolate) is presented. The high surface area and gas permeability of PIM‐1, combined with the chemical affinity and ion‐exchange properties of DBU‐imidazolate, contribute to enhanced CO2 sensitivity and selectivity. The research objectives included the synthesis of PIM‐1 and DBU‐imidazolate, the preparation of composite membranes, and the evaluation of their performance as CO2 sensors. Solvent casting and impregnation methods are employed to prepare the membranes, which are characterized using Thermal Gravimetric Analysis (TGA), and Field Emission Scanning Electron Microscopy (FESEM). CO₂ absorption tests and Electrochemical Impedance Spectroscopy (EIS) are conducted to assess the sensors' performance. The PIM‐1/DBU‐imidazolate membrane exhibited high efficiency in CO₂ capture and release. Open circuit voltage (OCV) measurements are performed under varying concentrations of CO2 exposure and cycles of adsorption/desorption. Results show that the membrane achieves steady state faster at higher CO2 concentrations, with a logarithmic relationship between CO2 concentration and voltage variation, indicating potential for CO2 detection in human environments. These results confirm the sensor's ability to detect varying CO2 concentrations, highlighting its potential for reliable and efficient CO2 monitoring in environmental and industrial applications.

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Cholinium amino acid-based ionic liquids

Donne

Bodo

2021

Biophys Rev

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Boosted by the simplicity of their synthesis and low toxicity, cholinium and amino acid-based ionic liquids have attracted the attention of researchers in many different fields ranging from computational chemistry to electrochemistry and medicine. Among the uncountable IL variations, these substances occupy a space on their own due to their exceptional biocompatibility that stems from being entirely made by metabolic molecular components. These substances have undergone a rather intensive research activity because of the possibility of using them as greener replacements for traditional ionic liquids. We present here a short review in the attempt to provide a compendium of the state-of-the-art scientific research about this special class of ionic liquids based on the combination of amino acid anions and cholinium cations.

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Unraveling the CO2 reaction mechanism in bio-based amino-acid ionic liquids by operando ATR-IR spectroscopy

Cited by 27 publications

References 54 publications

Enhanced CO₂ Absorption in Organic Solutions of Biobased Ionic Liquids

Enhanced CO₂ Absorption in Organic Solutions of Biobased Ionic Liquids

Enhanced CO₂ Detection Using Potentiometric Sensors Based on PIM‐1/DBU Imidazolate Membranes

Cholinium amino acid-based ionic liquids

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Unraveling the CO2 reaction mechanism in bio-based amino-acid ionic liquids by operando ATR-IR spectroscopy

Cited by 27 publications

References 54 publications

Enhanced CO2 Absorption in Organic Solutions of Biobased Ionic Liquids

Enhanced CO2 Absorption in Organic Solutions of Biobased Ionic Liquids

Enhanced CO₂ Detection Using Potentiometric Sensors Based on PIM‐1/DBU Imidazolate Membranes

Cholinium amino acid-based ionic liquids

Contact Info

Product

Resources

About

Enhanced CO₂ Absorption in Organic Solutions of Biobased Ionic Liquids

Enhanced CO₂ Absorption in Organic Solutions of Biobased Ionic Liquids