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Thermodynamic Study of Choline Chloride-Based Deep Eutectic Solvents with Water and Methanol
College of Chemical Engineering, State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing Tech University, 30# Puzhu South Road, Nanjing 211816, PR China.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-0453-0450
College of Chemical Engineering, State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing Tech University, 30# Puzhu South Road, Nanjing 211816, PR China.
College of Chemical Engineering, State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing Tech University, 30# Puzhu South Road, Nanjing 211816, PR China.
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2020 (English)In: Journal of Chemical and Engineering Data, ISSN 0021-9568, E-ISSN 1520-5134, Vol. 65, no 5, p. 2446-2457Article in journal (Refereed) Published
Abstract [en]

To study the effects of type and content of cosolvent as well as temperature on the properties of two well-known deep eutectic solvents (DESs), i.e., ChCl/EG (choline chloride + ethylene glycol at a molar ratio of 1:2) and ChCl/Gly (choline chloride and glycerol at a molar ratio of 1:2), the density and viscosity of the mixtures of ChCl/EG or ChCl/Gly with methanol (MeOH) and water (H2O) over the whole compositional range at temperatures from 288.15 to 323.15 K as well as the molar enthalpy of mixing for the mixtures of ChCl/EG or ChCl/Gly + MeOH were experimentally measured. The excess molar volume, viscosity deviation, and excess molar Gibbs energy of activation were further calculated to study the effects of temperature, types of cosolvent and DES, and their contents on the nonideal behavior of these pseudobinary systems. The molar enthalpy of mixing measured in this work was further compared with those with H2O as the cosolvent reported in the literature. It shows that the mixing of these two DESs with MeOH is exothermic, which is opposite compared to those mixed with H2O. Additionally, the nonrandom two-liquid model and Gibbs–Helmholtz equation were combined to represent the experimental results of the enthalpy of mixing.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2020. Vol. 65, no 5, p. 2446-2457
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-79988DOI: 10.1021/acs.jced.9b01113ISI: 000535280900019Scopus ID: 2-s2.0-85084674609OAI: oai:DiVA.org:ltu-79988DiVA, id: diva2:1446673
Note

Validerad;2020;Nivå 2;2020-06-24 (alebob)

Available from: 2020-06-24 Created: 2020-06-24 Last updated: 2020-06-24Bibliographically approved

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Ma, ChunyanJi, Xiaoyan

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