BIBLIOS

Document type
Journal articles

Document subtype
Full paper

Title
Influence of Thermophysical Properties of Ionic Liquids in Chemical Process Design

Participants in the publication
João M. P. França (Author)
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
Carlos A. Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE
Manuel Matos Lopes (Author)
Dep. Química e Bioquímica
CQE
Valentim M. B. Nunes (Author)
INSTITUTO POLITÉCNICO DE TOMAR

Summary
It has been proved in the past, with common liquids, that the values of their thermophysical properties have a significant effect on the design of physicochemical processing and reaction units, influencing directly the design parameters and performance of equipment like heat exchangers, distillation columns, and reactors. In this paper we have analyzed the effect of the uncertainty of thermophysical data of ionic liquids (density, heat capacity, thermal conductivity, and viscosity) in the design of some current equipment, used in processes as solvents or heat transfer fluids. Data have been collected from the IL Thermo database for alkylmethylimidazolium (Cnmim) liquids, with [BF4] and [PF6] anions. Results obtained show that the influence of actual errors in the thermophysical properties of ionic liquids can render any future design as not working or excessively costing. Moreover, the heat storage capacity of these ionic liquids has been analyzed, and it is possible to consider them as possible replacements of current silicon-based heat transfer fluids. The results obtained support that the implementation of those applications needs a careful selection of experimental data, otherwise equipment will be either under- or over-dimensioned, with the consequent ill operation or increased capital costs. In addition, they recommend a revision of the present methods of measurement of thermophysical properties of ionic liquids and the establishment of reference data on thermophysical properties with low uncertainty, to avoid the actual status of experimental data.


Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Where published
Journal of Chemical & Engineering Data

Publication Identifiers

Publisher
American Chemical Society (ACS)



Document Identifiers
DOI - https://doi.org/10.1021/je900107t
URL - http://dx.doi.org/10.1021/je900107t

Keywords
ionic liquids data uncertainty density heat capacity heat exchanger heat transfer thermal conductivity viscosity

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