Abstract
A thermochemical study of the protic ionic liquid 1,5-diazabicyclo[4.3.0]non-5-enium acetate ([DBNH][OAc]), a prospective cellulose solvent considered for the Ioncell-F process, was carried out. The heat capacities of 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) and [DBNH][OAc] were measured by differential scanning calorimetry (DSC) at 223-323 and 273-373 K temperature ranges, respectively. The enthalpies of fusion and synthesis reaction of [DBNH][OAc] were measured by DSC and reaction calorimetry, respectively. The gas-, liquid-, and solid-phase enthalpies of formation of [DBNH][OAc] and DBN were determined using calorimetric and computational methods. The enthalpy of vaporization of [DBNH][OAc] was estimated from the formation enthalpies. The activity coefficients at infinite dilution of 17 and the enthalpies of solution at infinite dilution of 25 organic solutes in [DBNH][OAc] were measured by gas chromatography and solution calorimetry methods, respectively. The obtained data will be used in the design and optimization of the Ioncell-F process.
Original language | English |
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Pages (from-to) | 10445-10454 |
Number of pages | 10 |
Journal | Industrial and Engineering Chemistry Research |
Volume | 55 |
Issue number | 39 |
DOIs | |
Publication status | Published - 5 Oct 2016 |
MoE publication type | A1 Journal article-refereed |
Funding
This work was supported by the Finnish Bioeconomy Cluster (FIBIC), the Academy of Finland, the Finnish Foundation for Technology Promotion, a STSM Grant from COST Action CM1206, the German Science Foundation (DFG) in the frame of the priority program SPP 1708 "Material Synthesis Near Room Temperature", grant of Russian Federation President MK-7126.2015, and Russian Government Program of Competitive Growth of Kazan Federal University.