Change search
ReferencesLink to record
Permanent link

Direct link
Insights into the Effect of CO2 Absorption on the Ionic Mobility of Ionic Liquids
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering. (Chemistry of Interfaces)
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering. (Chemistry of Interfaces)
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering. (Chemistry of Interfaces)
Number of Authors: 3
2016 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 18, no 41, 28617-28625 p.Article in journal (Refereed) Published
Abstract [en]

We investigate a comparative effect of CO2 absorption on the ionic mobility of two choline based ionic liquids comprising two different anions such as threonine and imidazole. The synthesized ionic liquids were characterized using 1H and 13C NMR and other spectroscopic techniques. By keeping a common cation and changing the anion from threonine to imidazole both the viscosity and density reduced drastically. We found that [N1,1,6,2OH][Imi] exhibits the highest CO2 capture capacity at 20 °C of 5.27 mol of CO2 per kg of ionic liquid (1.27 mol of CO2 per mol of ionic liquid, 23.26 wt% of CO2) whereas [N1,1,6,2OH][Threo] exhibits 3.6 mol of CO2 per kg of ionic liquid (1.05 mol of CO2 per mol of ionic liquid, 15.87 wt% of CO2). The activation energy for diffusion is calculated using the Vogel-Fulcher-Tamman (VFT) equation in the form of diffusivity. It was found that the activation energy for the diffusion of [N1,1,6,2OH][Threo] is ∼10 times higher than that of [N1,1,6,2OH][Imi]. 1H diffusion NMR data revealed that the diffusivity of [N1,1,6,2OH][Imi] is increased after CO2 absorption whereas a decrease in diffusivity was observed in the case of [N1,1,6,2OH][Threo]. This anomalous behavior of [N1,1,6,2OH][Imi] was further explained by using DFT calculations.

Place, publisher, year, edition, pages
2016. Vol. 18, no 41, 28617-28625 p.
National Category
Chemical Sciences
Research subject
Chemistry of Interfaces
Identifiers
URN: urn:nbn:se:ltu:diva-41888DOI: 10.1039/C6CP05804CISI: 000386668200025PubMedID: 27722357ScopusID: 2-s2.0-84992190469OAI: oai:DiVA.org:ltu-41888DiVA: diva2:1015029
Note

 Validerad; 2016; Nivå 2; 2016-10-28 (andbra)

Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2016-11-24Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMedScopus

Search in DiVA

By author/editor
Bhattacharyya, ShubhankarFilippov, AndreiShah, Faiz Ullah
By organisation
Chemical Engineering
In the same journal
Physical Chemistry, Chemical Physics - PCCP
Chemical Sciences

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 31 hits
ReferencesLink to record
Permanent link

Direct link