Change search
ReferencesLink to record
Permanent link

Direct link
Molar enthalpy of mixing and refractive indices of choline chloride-based deep eutectic solvents with water
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. College of Chemical Engineering, Nanjing Tech University.
College of Chemical Engineering, Nanjing Tech University.
College of Chemical Engineering, Nanjing Tech University.
College of Chemical Engineering, Nanjing Tech University.
Show others and affiliations
Number of Authors: 6
2017 (English)In: Journal of Chemical Thermodynamics, ISSN 0021-9614, E-ISSN 1096-3626, Vol. 105, 30-36 p.Article in journal (Refereed) Published
Abstract [en]

The molar enthalpies of mixing were measured for binary systems of choline chloride-based deep eutectic solvents (glycerol, ethylene glycol and malonic acid) with water at 298.15 K and 308.15 K, and atmospheric pressure with an isothermal calorimeter. Refractive indices were also measured at 303.15 K and atmospheric pressure. The binary mixtures of {chcl/glycerol (1:2) + water, chcl/ethylene glycol (1:2) + water} showed exothermic behaviour over the entire range of composition, while the binary mixture of {chcl/malonic acid (1:1) + water} showed endothermic behaviour at first and then changed to be exothermic with the increasing content of chcl/malonic acid (1:1). Experimental refractive indices were fitted with the Redlich–Kister equation, and experimental molar enthalpies of mixing were correlated with the Redlich–Kister equation and the non-random two-liquid (NRTL) model. The NRTL model with the fitted parameters was used to predict the vapour pressures of these three mixtures. For mixtures of {chcl/glycerol (1:2) + water} and {chcl/ethylene glycol (1:2) + water}, the predicted vapour pressures agreed well with the experimental reults from the literature. While for mixture of {chcl/malonic acid (1:1)+water}, the predicted vapour pressures showed deviation at the high concentration of chcl/malonic acid (1:1), and this was probably because of the complex molecular interaction between chcl/malonic acid (1:1) and water

Place, publisher, year, edition, pages
2017. Vol. 105, 30-36 p.
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-47140DOI: 10.1016/j.jct.2016.10.002ScopusID: 2-s2.0-84991497569OAI: oai:DiVA.org:ltu-47140DiVA: diva2:1020856
Note

Validerad; 2016; Nivå 2; 2016-11-03 (andbra)

Available from: 2016-10-04 Created: 2016-10-04 Last updated: 2016-12-04Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Ma, ChunyanJi, Xiaoyan
By organisation
Energy Science
In the same journal
Journal of Chemical Thermodynamics
Energy Engineering

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 34 hits
ReferencesLink to record
Permanent link

Direct link