Molecular interactions of (ionic liquid butylammonium methanoate plus alcohols) at several temperatures. Part II: sec-Butylammonium methanoate (S4Met)

Author(s)

Hoga, Heloisa Emi ; Fernandes, Robert Lunkez ; Olivieri, Gustavo Vieira ; Torres, Ricardo Belchior

• Document type: Journal article
• Source: JOURNAL OF CHEMICAL THERMODYNAMICS; v. 178, p. 16-pg., 2022-12-08.

Abstract

Volumetric and acoustic properties were obtained by density (rho) and speed of sound (u) experimental values for the binary liquid systems containing the protic ionic liquid (IL) sec-butylammonium methanoate (S4Met) + alcohols (ethanol, 1-propanol, 1-butanol and 1-pentanol) over the whole composition range at different temperatures (293.15-313.15) K and ambient pressure (p = 92.3 kPa). A neutralization reaction was carried out under controlled temperature to synthesize S4Met, which underwent spectroscopic analyses to guarantee its formation. All the excess properties, namely excess molar volume, VEm, excess partial molar volumes,VEi , and deviation in isentropic compressibility,Delta kappa S, presented negative values. Other volumetric properties such as partial molar volumes,Vi, apparent molar volumes, V phi i and infinite dilution volumes,Vi infinity, were determined. In addition to the thermodynamic approach, spectroscopy techniques essentially 1H NMR, 13C NMR, FTIR were useful in order to elucidate intermolecular interactions among the species in solutions. Lastly, the Peng-Robinson-Stryjek-Vera equation of state (PRSV EOS) was used to correlate the excess molar volumes. (AU)

• FAPESP's process: 09/14556-5 - Volumetric, transport, and acoustic properties of binary systems containing ionic liquids: experimental study and modeling
• Grantee: Ricardo Belchior Tôrres
• Support Opportunities: Regular Research Grants
• FAPESP's process: 16/02652-3 - Experimental study and modeling of thermodynamics properties of binary systems containing {dimethyl carbonate (DMC) + alcohols} at high pressure
• Grantee: Gustavo Vieira Olivieri
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 19/00289-7 - Study of the epoxidation reaction of the soybean oil: kinetic modeling and study of the process in continuous reactor
• Grantee: Gustavo Vieira Olivieri
• Support Opportunities: Scholarships in Brazil - Doctorate