Document type
Journal articles
Document subtype
Full paper
Title
Molten alkali carbonates as alternative engineering fluids for high temperature applications
Participants in the publication
V.M.B. Nunes (Author)
INSTITUTO POLITÉCNICO DE TOMAR
M.J.V. Lourenço (Author)
Dep. Química e Bioquímica
CQE
F.J.V. Santos (Author)
Dep. Química e Bioquímica
CQE
C.A. Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE
Summary
Molten salts are a very relevant member of industrial fluids for high temperature applications, such as catalytic medium for coal gasification, molten salt oxidation of wastes, heat transfer fluids or latent, sensible heat storage and solar (CSP) or nuclear power station operations. Available data on thermophysical properties, applications and a discussion of the state of the art for molten alkali carbonates and its mixtures like pure Li2CO3, Na2CO3 and K2CO3, mixtures of Li2CO3-Na2CO3, Li2CO3-K2CO3 (binary eutectics) and Li2CO3-Na2CO3-K2CO3 (ternary eutectic) and nanofluids based in these carbonate melts are presented. These melts are especially suitable for application at higher temperature regimes, like those involving high temperature energy storage, coolants or molten salts oxidations of wastes and therefore the accurate knowledge of their most important thermophysical properties is essential for efficient energy transfer and storage, because of their impact on energy efficiency, namely in energy savings and decrease of carbon footprint. From the analysis performed it can be concluded that the scatter of data found for molten alkali carbonates, added to present and future applications, still justifies further studies on these systems, to support their application as alternative engineering fluids. Additionally, some comments on how to improve present situation of methods and measurements are made, especially in the area of thermal conductivity.
Date of Publication
2019-05
Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
Where published
Applied Energy
Publication Identifiers
ISSN - 0306-2619
Publisher
Elsevier BV
Number of pages
7
Starting page
1626
Last page
1633
Document Identifiers
URL -
http://dx.doi.org/10.1016/j.apenergy.2019.03.190
DOI -
https://doi.org/10.1016/j.apenergy.2019.03.190
Rankings
Web Of Science Q1 (2018) - 8.426 - ENERGY & FUELS - SCIE
SCIMAGO Q1 (2018) - 3.455 - Energy (miscellaneous)
Web Of Science Q1 (2018) - 8.426 - ENGINEERING, CHEMICAL - SCIE
Keywords
Molten salts
Thermophysical properties
Molten carbonates
Energy storage
Heat transfer fluids
Nanosalts