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New method for the estimation of viscosity of pure and mixtures of ionic liquids based on the UNIFAC–VISCO model

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Zhao, Nan, Jacquemin, Johan, Oozeerally, Ryan and Degirmenci, Volkan (2016) New method for the estimation of viscosity of pure and mixtures of ionic liquids based on the UNIFAC–VISCO model. Journal of Chemical & Engineering Data, 61 (6). pp. 2160-2169. doi:10.1021/acs.jced.6b00161

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Official URL: http://dx.doi.org/10.1021/acs.jced.6b00161

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Abstract

A modified UNIFAC–VISCO group contribution method was developed for the correlation and prediction of viscosity of ionic liquids as a function of temperature at 0.1 MPa. In this original approach, cations and anions were regarded as peculiar molecular groups. The significance of this approach comes from the ability to calculate the viscosity of mixtures of ionic liquids as well as pure ionic liquids. Binary interaction parameters for selected cations and anions were determined by fitting the experimental viscosity data available in literature for selected ionic liquids. The temperature dependence on the viscosity of the cations and anions were fitted to a Vogel–Fulcher–Tamman behavior. Binary interaction parameters and VFT type fitting parameters were then used to determine the viscosity of pure and mixtures of ionic liquids with different combinations of cations and anions to ensure the validity of the prediction method. Consequently, the viscosities of binary ionic liquid mixtures were then calculated by using this prediction method. In this work, the viscosity data of pure ionic liquids and of binary mixtures of ionic liquids are successfully calculated from 293.15 K to 363.15 K at 0.1 MPa. All calculated viscosity data showed excellent agreement with experimental data with a relative absolute average deviation lower than 1.7%.

Item Type: Journal Article
Subjects: T Technology > TP Chemical technology
Divisions: Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH): Ionic solutions -- Viscosity -- Estimates -- Mathematical models
Journal or Publication Title: Journal of Chemical & Engineering Data
Publisher: American Chemical Society
ISSN: 0021-9568
Official Date: 31 May 2016
Dates:
DateEvent
31 May 2016Published
18 May 2016Accepted
22 February 2016Submitted
Volume: 61
Number: 6
Page Range: pp. 2160-2169
DOI: 10.1021/acs.jced.6b00161
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
EP/M021785/1Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
UNSPECIFIEDCommissariat à l'Énergie Atomique et aux Énergies Alternativeshttp://dx.doi.org/10.13039/501100006489

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