(p,ρ,T) properties of 1-octyl-3-methylimidazolium tetrafluoroborate

Javid T. Safarov, Aygul T. Namazova, Astan Shahverdyiev, Egon Hassel

Abstract


p,ρ,T) data of 1-octyl-3-methylimidazolium tetrafluoroborate [OMIM][BF4] over a wide range of temperatures, from 278.15 to 413.15 K, and pressures, p, up to 140 MPa are reported with an estimated ±0.01–0.08 % experimental relative average percent deviation (APD) in density. The measurements were carried out using an Anton Paar DMA HPM vibration tube densimeter. (p,ρ,T) data of [OMIM][BF4] has been fitted and parameters of the applied equation were determined as a function of pressure and temperature. After a thorough analysis of literature values and validity of the used equation of state, various thermophysical properties such as isothermal compressibility, isobaric thermal expansibility, differences in isobaric and isochoric heat capacities, thermal pressure coefficient, internal pressure, heat capacities at constant pressure and volume, speed of sound and isentropic exponent at temperatures 278.15–413.15 K and pressures pup to 140 MPa were calculated.

 


Keywords


ionic liquid; density; equation of state; thermal properties; caloric properties; speed of sound

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DOI: http://dx.doi.org/10.2298/JSC161129091S

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