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Modeling thermodynamic derivative properties of ionic liquids with ePC-SAFT
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Energivetenskap.
Department for Biochemical and Chemical Engineering, TU Dortmund.
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, College of Chemistry and Chemical Engineering, Nanjing University of Technology.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Energivetenskap.ORCID-id: 0000-0002-0200-9960
2015 (Engelska)Ingår i: Fluid Phase Equilibria, ISSN 0378-3812, E-ISSN 1879-0224, Vol. 405, s. 73-82Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In this work, ePC-SAFT was extended to predict the second order thermodynamic derivative properties of pure ionic liquids (ILs), such as isothermal and isentropic compressibility coefficients, thermal pressure coefficient, heat capacities, speed of sound, thermal expansion coefficient and internal pressure. ePC-SAFT predictions were compared with available experimental data of imidazolium-based ILs. The pure-component ePC-SAFT parameters for the IL-cations [C2mim]+, [C4mim]+, [C6mim]+ and [C8mim]+, and IL-anions [BF4]−, [PF6]− and [Tf2N]− were taken from literature in order to predict the thermodynamic derivative properties. The pure-component ePC-SAFT parameters for the IL-cations [C3mim]+, [C5mim]+, [C7mim]+ and [C10mim]+ were predicted based on linear molecular-weight-dependent relations. These estimated ePC-SAFT parameters were verified by comparing so-predicted pure-IL density as well as predicted CO2 solubility in ILs with respective experimental data. Further, these parameters were used to predict the second order thermodynamic derivative properties. The comparison of model prediction with experimental data showed that ePC-SAFT predictions were reliable in a wide temperature and pressure range.

Ort, förlag, år, upplaga, sidor
2015. Vol. 405, s. 73-82
Nationell ämneskategori
Energiteknik
Forskningsämne
Energiteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-10939DOI: 10.1016/j.fluid.2015.07.018ISI: 000361933700010Scopus ID: 2-s2.0-84938891498Lokalt ID: 9d4e0782-8247-4699-b18d-5ef64fa818beOAI: oai:DiVA.org:ltu-10939DiVA, id: diva2:983887
Anmärkning
Validerad; 2015; Nivå 2; 20150812 (xiajix)Tillgänglig från: 2016-09-29 Skapad: 2016-09-29 Senast uppdaterad: 2018-07-10Bibliografiskt granskad

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Shen, GulouJi, Xiaoyan

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