Journal
FLUID PHASE EQUILIBRIA
Volume 441, Issue -, Pages 17-23Publisher
ELSEVIER
DOI: 10.1016/j.fluid.2017.01.021
Keywords
Adsorption equilibria; Ionic liquids; Activated carbon; Dubinin-Astakhov equation
Funding
- JSPS (Japan Society for the Promotion of Science) KAKENHI [15J02431]
- JSPS research Fellowships for young scientists
- Grants-in-Aid for Scientific Research [16K18273, 15J02431, 16H04549] Funding Source: KAKEN
Ask authors/readers for more resources
Adsorption equilibria of imidazolium-based ionic liquids (ILs), [Omim]Cl, [Hmim]Cl and [Bmim]Cl, onto activated carbon from aqueous solutions were measured using a dynamic fixed-bed method at temperatures from 303 to 323 K. The measured amount of adsorbed IL increased with an increase in alkyl chain length of cation as [Omim]Cl > [Hmim]Cl > [Bmim]Cl, and this trend can be explained by hydrophobicity of the IL. The amount of adsorbed ILs decreased with an increase in temperature and ranged from 0.70 to 0.61 mmol/g-adsorbent at a concentration of 1.2 mol/m(3) for the case of [Omim]Cl. Fitting parameters in the Dubinin-Astakhov (DA) equation determined with correlation of the experimental data, E (interaction energy between IL and adsorbent) and q(0) (saturated adsorption amount of IL), increased with an increase in the alkyl chain length of cation, and that could be clearly related to the physicochemical properties of the IL such as hydrophobicity and molecular size. Analysis of adsorption equilibrium data with the DA equation allows design of adsorption processes for ILs. (C) 2017 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available