Kinetics analysis and regeneration performance of 1-butyl-3-methylimidazolium glycinate solutions for CO 2  capture

Wu, Zaikun; Huang, Zailong; Zhang, Yi; Qin, Yuan-Hang; Ma, Jun; Luo, Yunbai

doi:10.1016/j.cej.2016.03.030

Cited by 30 publications

(9 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From these quantitative results, it can be seen that the CO 2 absorption capacity by the imidazolium cationic C2 site (0.33 mol CO 2 mol –1 IL) accounted for the highest proportion, while the contribution of glycinate anion was small (in the form of carbamate). This is quite different from the previous reports in the literature, ,− where anion contribution is predominant. It is believed that H 2 O and [C 2 mim] + played a significant role in the humid CO 2 absorption, and H 2 O entering the system changed the way the ILs captured CO 2 , and the reaction was promoted to generate [HCO 3 ] − and NHC-CO 2 , while the ability of glycinate anion to interact with CO 2 was weakened greatly.…”

Section: Resultscontrasting

confidence: 99%

“…Based on the results of the above spectral investigations, there were mainly three possible sites in [C 2 mim][Gly] for the absorption of humid CO 2 :C2 site of the cation, and carboxyl and amino sites of the anion. , To understand the absorption mode and mechanism more clearly, quantum chemical calculations were performed for such systems. Since spectral analysis showed that [C 2 mim] + did not contribute CO 2 absorption sites in the initial stage of absorption, only the structure of [Gly] − interacting with CO 2 and H 2 O molecules was optimized.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

How Does the Moisture Affect CO₂ Absorption by a Glycinate Ionic Liquid?

Min¹,

Li²,

Wang³

et al. 2021

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Ionic liquids (ILs) have shown great potential in CO 2 capture from the exhaust of fossil fuels burning due to their unique structures and properties. Since the flue gas often contains a small amount of water, understanding the effect of water is critical for the direct capture of postcombustion CO 2 by ionic liquids. In recent years, the effect of water in CO 2 capture by ILs has been studied in some details, but little is known of the new species produced after humid CO 2 capture and thus for the system composition as well as the contribution of each absorption site of ILs to the capture capacity of CO 2 . In this work, a simple amino acid ionic liquid, 1-ethyl-3methylimidazolium glycinate ([C 2 mim][Gly]), has been prepared and used to absorb humid CO 2 at 25 °C, and a quantitative approach is established to estimate the absorption capacity of CO 2 by different absorption sites. It is found that the absorption capacity of CO 2 is as high as 0.91 mol CO 2 per mol IL in the wet environment, which is nearly double that of dry CO 2 by neat IL. Quantitative investigations by multiple spectral techniques and quantum chemical calculations indicate that the inhalation of H 2 O results in the production of [HCO 3 ] − in the system and activation of the C2 site of the imidazolium cation. It is this activated site that reacts with CO 2 to form imidazolium-2-carboxylate (NHC-CO 2 ) and significantly improves the absorption capacity of CO 2 . This is remarkably different from the absorption of dry CO 2 , in which anions of the IL are predominant for the absorption of CO 2 .

show abstract

Section: Resultscontrasting

confidence: 99%

Section: Resultsmentioning

confidence: 99%

How Does the Moisture Affect CO₂ Absorption by a Glycinate Ionic Liquid?

Min¹,

Li²,

Wang³

et al. 2021

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…The viscosities of [emim][Gly]+[emim][Ac] are lower than those of [emim][Gly] but higher than those of [emim][Ac], meanwhile, the viscosities of [emim][Ala]+[emim][Ac] are lower than those of [emim][Ala] but higher than those of [emim][Ac]. The viscosities of [emim][Gly+[emim][Ac] and [emim][Ala]+[emim][Ac] are determined to be 79.1 and 74.4 cP, respectively, at 298.2 K, being higher than those of AAILs + H 2 O hybrids but lower than those of AAILs + PEG hybrids …”

Section: Resultsmentioning

confidence: 99%

“…Diluting AAILs with low‐viscous physical solvents or immobilizing AAILs in porous supports, represent two commonly referred strategies to promote the absorption of CO 2 in AAILs. For example, Han et al and Deng et al blended choline prolinate ([Ch][Pro]) and tetrabutylphosphonium glycinate ([P 4444 ][Gly]) respectively, with polyethylene glycol (PEG) for reversible absorption of CO 2 ; Wu et al, Zhou et al, Li et al and Luo et al investigated the absorption of CO 2 in aqueous solutions of AAILs, such as tetramethylammonium glycinate ([N 1111 ][Gly]), 1‐(2‐hydroxlethyl)‐3‐methylimidazolium glycinate ([C 2 OHmim][Gly], 1‐ethyl‐3‐methylimidazolium glycinate ([emim][Gly]), etc. ; Li et al immobilized 1‐ethyl‐3‐methylimidazolium glycinate ([emim][Gly]) and 1‐ethyl‐3‐methylimidazolium lysinate ([emim][Lys]) in porous poly(methyl methacrylate) (PMMA) microspheres for facilitated adsorption of CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Chemical solvent in chemical solvent: A class of hybrid materials for effective capture of CO₂

et al. 2017

View full text Add to dashboard Cite

in Wiley Online Library (wileyonlinelibrary.com)Amino acid ionic liquids (AAILs) are chemical solvents with high reactivity to CO 2 . However, they suffer from drastic increase in viscosity on the reaction with CO 2 , which significantly limits their application in the industrial capture of CO 2 . In this work, 1-ethyl-3-methylimidazolium acetate ([emim][Ac]) which also exhibits chemical affinity to CO 2 but low viscosity, and its viscosity does not increase drastically after CO 2 absorption, was proposed as the diluent for AAILs to fabricate hybrid materials. The AAIL1[emim][Ac] hybrids were found to display enhanced kinetics for CO 2 absorption, and their viscosity increase after CO 2 absorption are much less significant than pure AAILs. More importantly, owing to the fact that [emim][Ac] itself can absorb large amount of CO 2 , the AAIL1[emim][Ac] hybrids still have high absolute capacities of CO 2 . Such hybrid materials consisting of a chemical solvent plus another chemical solvent are believed to be a class of effective absorbents for CO 2 capture. a The mass fraction of [Ch][Pro] is 50%. b The mass fraction of [C 2 (N 114 ) 2 ][Gly] 2 is 40%. c The mass fraction of [N 1111 ][Gly] 2 is 40%. d The mass fraction of [C 2 OHmim][Gly] is 8%. e The mass fraction of [APmim][Gly] is 11%. f The mass fraction of DAIL is 50%. g The mass fraction of [DETA][Cl] is 36%. h The mass fraction of [P 4444 ][Gly] is 41%. i The mass fraction of [aP 4443 ][Gly] is 41%. j The mass fraction of [emim][Lys] is 49%. k The mass fraction of [emim][Gly] is 50%. l The mass fraction of MEA is 30%. m The mass fraction of MDEA is 50%. Figure 9. FTIR spectra of fresh and recycled [emim] [Gly]1[emim] [Ac].[Color figure can be viewed at wileyonlinelibrary.com]

show abstract

“…Ionic liquids, which are in general a kind of liquid electrolytes composed entirely of ions at room temperature or below 100°C, provoke a wide interest in the scientific community, due to their outstanding characteristics such as negligible vapor pressure, high thermal stability, and tunable chemistry, and so on . During the past decades, scientists have synthesized numerous kinds of ILs, such as those based on imidazolium, ammonium, and amino acid . These ILs have been studied for absorbing CO 2 in detail and some of them have achieved good results.…”

Section: Introductionmentioning

confidence: 99%

Protic ionic liquid as excellent shuttle of MDEA for fast capture of CO₂

Zheng

Huang

et al. 2017

AIChE Journal

View full text Add to dashboard Cite

A cheap protic ionic liquid (PIL), 3-(Dimethylamino)-1-propylamine acetate (abbreviated as [DMAPAH][Ac]), is investigated in this work as the activator of N-methyldiethanolamine (MDEA) for fast capture of CO 2 . The PIL-activated MDEA solutions show excellent performance in absorption rate and capacity (!2.5 molÁkg 21 ). A novel absorption mechanism is proposed to account for the phenomenon, where the shuttling role of the PIL is described in detail. Additionally, the enthalpy change DH SOL (245 to 252 kJÁmol 21 ), the turnover number of the PIL and the regeneration efficiency (>92%) are also measured. All these data show that the PIL-mediated MDEA solutions may be used as a kind of promising absorbents for fast capture of CO 2 . Figure 2. Absolute absorption capacity (a) and relative CO 2 loading (moles of CO 2 absorbed by per mole of PIL) (b) of PIL aqueous solutions as a function of the PIL concentration (ٗ: 60 wt %; ᭺: 70 wt %; ᭝: 80 wt %; ᭞: 90 wt %) at T 5 308.15 K.

show abstract

Kinetics analysis and regeneration performance of 1-butyl-3-methylimidazolium glycinate solutions for CO 2 capture

Cited by 30 publications

References 38 publications

How Does the Moisture Affect CO₂ Absorption by a Glycinate Ionic Liquid?

How Does the Moisture Affect CO₂ Absorption by a Glycinate Ionic Liquid?

Chemical solvent in chemical solvent: A class of hybrid materials for effective capture of CO₂

Protic ionic liquid as excellent shuttle of MDEA for fast capture of CO₂

Contact Info

Product

Resources

About

Kinetics analysis and regeneration performance of 1-butyl-3-methylimidazolium glycinate solutions for CO 2 capture

Cited by 30 publications

References 38 publications

How Does the Moisture Affect CO2 Absorption by a Glycinate Ionic Liquid?

How Does the Moisture Affect CO2 Absorption by a Glycinate Ionic Liquid?

Chemical solvent in chemical solvent: A class of hybrid materials for effective capture of CO2

Protic ionic liquid as excellent shuttle of MDEA for fast capture of CO2

Contact Info

Product

Resources

About

How Does the Moisture Affect CO₂ Absorption by a Glycinate Ionic Liquid?

How Does the Moisture Affect CO₂ Absorption by a Glycinate Ionic Liquid?

Chemical solvent in chemical solvent: A class of hybrid materials for effective capture of CO₂

Protic ionic liquid as excellent shuttle of MDEA for fast capture of CO₂