期刊
THERMOCHIMICA ACTA
卷 652, 期 -, 页码 62-68出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.tca.2017.03.012
关键词
Alkyl formate; 1-Butylimidazole; Hydrolysis-complexation process; Equilibria; Complexing agent; Calorimetry
资金
- Abo Akademi
- Academy of Finland
- Cost Action STSM on ionic liquids [CM1206]
- Kempe Foundations
- Knut and Alice Wallenberg Foundation
- Bio4Energy programme
Formic acid production by ethyl or methyl formate hydrolysis was improved using 1-butylimidazole as a complexing agent. The chemical process involved both hydrolysis and complexation steps. The complexation equilibria were investigated by deriving theoretical equations using the equilibrium constant of the hydrolysis step, the apparent formation constant of the complexation process and the initial concentration of the complexing agent. The treatment of the experimental results within the experimental domain indicated that an equimolar amount of the acid and the base did not lead to the complex formation. Experimental observation suggested that the derived equation could be simplified by assuming that the stoichiometric coefficient of the complexing agent was 0.5. The apparent reaction enthalpy obtained from this equation was compared to the experimental one using a Tian-Calvet calorimeter and a good agreement was found between them. FTIR spectroscopy was used to confirm the existence of the complex between formic acid and 1-butylimidazole. (C) 2017 Elsevier B.V. All rights reserved.
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