Study of vapor-liquid equilibrium for glycols of various molecular weights

Coefficients of Evaporation and Gas Phase Diffusion of Low-Volatility Organic Solvents in Nitrogen from Interferometric Study of Evaporating Droplets

“…Since our experimental data for TEG are of high accuracy, we believe that equilibrium vapor pressure we found at 298 K is quite accurate: 0.044 ± 0.008 Pa. It is lower than the extrapolated literature value ,, by a factor of ∼3. Similar procedure for TTEG was not possible, since we were not able to discern whether single-domain evolutions we observed did correspond to pure (single-component) TTEG evaporation.…”

“…43,46,47 We considered it a probable source of errors. For instance, vapor pressure of DEG at 298 K, extrapolated from data in ref 47 (13.5 Pa), is an order of magnitude higher than extrapolated from the data from ref 46 (1.38 Pa).…”

“…In both cases the equilibrium vapor pressure value we used had been extrapolated from literature data corresponding to much higher temperatures. ,, We considered it a probable source of errors. For instance, vapor pressure of DEG at 298 K, extrapolated from data in ref (13.5 Pa), is an order of magnitude higher than extrapolated from the data from ref (1.38 Pa). The value claimed as nonextrapolated, given in ref , is even lower (0.626 Pa).…”

“…However, for the two most slowly evaporating compounds (TEG and TTEG) the discrepancies were significant. In both cases the equilibrium vapor pressure value we used had been extrapolated from literature data corresponding to much higher temperatures. ,, We considered it a probable source of errors. For instance, vapor pressure of DEG at 298 K, extrapolated from data in ref (13.5 Pa), is an order of magnitude higher than extrapolated from the data from ref (1.38 Pa).…”

“…In both cases the equilibrium vapor pressure value we used had been extrapolated from literature data corresponding to much higher temperatures. 43,46,47 We considered it a probable source of errors.…”