Temperature dependence of limiting activity coefficients, Henry's law constants, and related infinite dilution properties of C4–C6 isomeric n-alkyl ethanoates/ethyl n-alkanoates in water. Measurement, critical compilation, correlation, and recommended data

Thermodynamic properties of five biofuel-relevant compounds at infinite dilution in water

“…The temperatures T max, corresponding to the maxima and the change of the dissolution from exothermic to endothermic, are listed in Table 9. Note that T max vary from sub-ambient (2,5-dimethylfuran), through ambient (2-methylfuran and furfural) to appreciably super-ambient (methyl vinyl ketone and allyl alcohol), which complies with the rough general trend of T max increasing with decreasing hydrophobicity as we observed on a variety of solutes [8,30,33].…”

“…In this method, an entraining inert gas is passed through a highly dilute solution, and the rate of the solute elution is measured analyzing periodically the outlet gas by gas chromatography. In the following, we confine the IGS description to aspects relevant for the present application; for more details, the reader is referred to previous work from this laboratory [7,8].…”

“…Eq. (5) has been widely used to adequately represent K aw ðTÞ and c 1 1 ðTÞ dependences for a variety of VOC solutes in the range from the melting temperature to the normal boiling temperature of water [8,30,31].…”

Effect of additives on volatility of aroma compounds from dilute aqueous solutions

“…(5) to obtain the ratios K GL =K 0 GL . The values of gas-liquid partition coefficients of the esters for the pure water solvent K 0 GL needed for the vapor space correction were calculated from recommended temperature dependences of respective Henry's law constants K H [12] considering that…”

“…Least-squares optimized values of K with their standard uncertainties u(K) for Table 3 The effect of additive (3) molality m 3 on the air-water partition coefficient K GL of butyl ethanoate (1) at 306.9 K. Experimental HSGC data: ratios of HSGC responses A 1 =A 0 1 , solute concentrations c 1 =c 0 1 , and gas-liquid partition coefficients K GL =K 0 GL for the samples with the additive and without it, respectively. [12] and Eq. (9).…”