shows a comparison between the experimental results of
evaporative losses from the n-alcohol/diesel fuel blends (20% of
alcohol) and those proposed by UNIFAC-Dortmund-Continuous
method. Additionally, results obtained from the ideal method
(activity coefficient = 1) are included for each alcohol. The mass
of methanol in the blend was completely evaporated at around
10 h, the mass of ethanol at around 20 h and the mass of
n-propanol at around 60 h (see Fig. 6). On the contrary, in the case
of n-butanol and n-pentanol, after 90 h the alcohol mass was not
completely evaporated (scale of y axis is different for the heaviest
alcohols), consistently with their lower volatility.
Comparing the methods used, the UNIFAC-DortmundContinuous
method proposed in this work predicts with qualitatively
good accuracy the evaporative losses for all alcohols, with
no fitting constants. An approximately inversely proportional