Combined physical and chemical absorption of carbon dioxide in a mixture of ionic liquids

Pinto, Alicia M.; Rodríguez, Héctor; Arce, Alberto; Soto, Ana

doi:10.1016/j.jct.2013.10.023

Cited by 69 publications

(29 citation statements)

References 46 publications

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“…These results contrast with the behaviour of the neat IL (Figure b) where, at any given pressure, the amount of CO 2 retained in the absorbent is higher in the desorption branch of the isotherm. A similar situation was observed by other authors with [emim][acetate], the difficulty in desorbing the captured gas being ascribed to the irreversibility of the chemical absorption, although the results showed for ENIL in this study indicate the important role of mass transfer constrains when assessing reversibility. The fact of obtaining quick and efficient CO 2 sorption and desorption using ENIL systems indicates that the CO 2 capture is controlled by mass transfer rather than reaction kinetics.…”

Section: Resultssupporting

confidence: 91%

Encapsulated Ionic Liquids for CO₂ Capture: Using 1‐Butyl‐methylimidazolium Acetate for Quick and Reversible CO₂ Chemical Absorption.

et al. 2016

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The potential advantages of applying encapsulated ionic liquid (ENIL) to CO capture by chemical absorption with 1-butyl-3-methylimidazolium acetate [bmim][acetate] are evaluated. The [bmim][acetate]-ENIL is a particle material with solid appearance and 70 % w/w in ionic liquid (IL). The performance of this material as CO sorbent was evaluated by gravimetric and fixed-bed sorption experiments at different temperatures and CO partial pressures. ENIL maintains the favourable thermodynamic properties of the neat IL regarding CO absorption. Remarkably, a drastic increase of CO sorption rates was achieved using ENIL, related to much higher contact area after discretization. In addition, experiments demonstrate reversibility of the chemical reaction and the efficient ENIL regeneration, mainly hindered by the unfavourable transport properties. The common drawback of ILs as CO chemical absorbents (low absorption rate and difficulties in solvent regeneration) are overcome by using ENIL systems.

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Section: Resultssupporting

confidence: 91%

Encapsulated Ionic Liquids for CO₂ Capture: Using 1‐Butyl‐methylimidazolium Acetate for Quick and Reversible CO₂ Chemical Absorption.

et al. 2016

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“…The CO 2 absorption in [C 2 MIM][Ac] (chemically absorbed CO 2 )a nd [C 2 MIM][EtSO 4 ]( physically absorbed CO 2 )a nd their binarym ixtures was studied by Pinto et al [143] In the binary mixture, ac ombination of chemical and physical absorptions took place and the addition of [Ac]. [89]…”

Section: Il-il or Il-small Organicm Olecules Mixturesmentioning

confidence: 99%

Carbon Dioxide Capture with Ionic Liquids and Deep Eutectic Solvents: A New Generation of Sorbents

2016

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High cost and high energy penalty for CO uptake from flue gases are important obstacles in large-scale industrial applications, and developing efficient technology for CO capture from technical and economic points is crucial. Ionic liquids (ILs) show the potential for CO separation owing to their inherent advantages, and have been proposed as alternatives to overcome the drawbacks of conventional sorbents. Chemical modification of ILs to improve their performance in CO absorption has received more attention. Deep eutectic solvents (DESs) as a new generation of ILs are considered as more economical alternatives to cope with the deficiencies of high cost and high viscosity of conventional ILs. This Review discusses the potential of functionalized ILs and DESs as CO sorbents. Incorporation of CO -philic functional groups, such as amine, in cation and/or anion moiety of ILs can promot their absorption capacity. In general, the functionalization of the anion part of ILs is more effective than the cation part. DESs represent favorable solvent properties and are capable of capturing CO , but the research work is scarce and undeveloped compared to the studies conducted on ILs. It is possible to develop novel DESs with promising absorption capacity. However, more investigation needs to be carried out on the mechanism of CO sorption of DESs to clarify how these novel sorbents can be adjusted and fine-tuned to be best tailored as optimized media for CO capture.

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“…A comprehensive review of these research efforts is reported by Dai et al, 2016. Ionic liquids containing a carboxylic anion are more biodegradable and less toxic than most other ILs (Chen et al, 2014). Moreover, the 1-ethyl-3-methylimidazolium acetate for ILs because of the mechanism leading to a greater absorption capacity of the gas (Pinto et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Carbon dioxide capture by [emim][Ac] ionic liquid in a polysulfone hollow fiber membrane contactor

Gómez‐Coma

Garea

Irabien

2016

International Journal of Greenhouse Gas Control

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CO2 emissions have to be controlled and reduced in order to avoid greenhouse effect. This work reports an analysis of the efficiency of CO2 separation using a hollow fiber membrane contactor and an ionic liquid. This process configuration contributes to the process intensification approach in the field of CO2 capture and storage. In this study, the ionic liquid 1-ethyl-3-methylimidazolium acetate, [emim][Ac], was used as absorbent due to its high solubility. The module selected was polysulfone (Ps) because it is a well characterized polymer that allows to operate at moderate temperatures. Results were compared to previous studies with a polypropylene module. The gas stream flowed through the inside of the hollow fibers. The CO2 removal efficiency was obtained from experimental data, showing a temperature dependence: from 30 to 45.0 %, corresponding to 291 K and 348 K respectively, when the Ps contactor was used. The overall mass transfer coefficient Koverall has also been evaluated. In addition, a numerical analysis was carried out to study the performance of the membrane contactor for the CO2 capture in order to estimate the process conditions to accomplish 90% CO2 capture as a target to be competitive with the conventional absorption process.

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Combined physical and chemical absorption of carbon dioxide in a mixture of ionic liquids

Cited by 69 publications

References 46 publications

Encapsulated Ionic Liquids for CO₂ Capture: Using 1‐Butyl‐methylimidazolium Acetate for Quick and Reversible CO₂ Chemical Absorption.

Encapsulated Ionic Liquids for CO₂ Capture: Using 1‐Butyl‐methylimidazolium Acetate for Quick and Reversible CO₂ Chemical Absorption.

Carbon Dioxide Capture with Ionic Liquids and Deep Eutectic Solvents: A New Generation of Sorbents

Carbon dioxide capture by [emim][Ac] ionic liquid in a polysulfone hollow fiber membrane contactor

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Combined physical and chemical absorption of carbon dioxide in a mixture of ionic liquids

Cited by 69 publications

References 46 publications

Encapsulated Ionic Liquids for CO2 Capture: Using 1‐Butyl‐methylimidazolium Acetate for Quick and Reversible CO2 Chemical Absorption.

Encapsulated Ionic Liquids for CO2 Capture: Using 1‐Butyl‐methylimidazolium Acetate for Quick and Reversible CO2 Chemical Absorption.

Carbon Dioxide Capture with Ionic Liquids and Deep Eutectic Solvents: A New Generation of Sorbents

Carbon dioxide capture by [emim][Ac] ionic liquid in a polysulfone hollow fiber membrane contactor

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Product

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Encapsulated Ionic Liquids for CO₂ Capture: Using 1‐Butyl‐methylimidazolium Acetate for Quick and Reversible CO₂ Chemical Absorption.

Encapsulated Ionic Liquids for CO₂ Capture: Using 1‐Butyl‐methylimidazolium Acetate for Quick and Reversible CO₂ Chemical Absorption.