Recommended Correlations for the Surface Tension of 42 Alkenes

This is the authors' abstract. We don't add key points for this paper.

Surface tension values for 42 alkenes at different temperatures have been compiled from databases, books, and papers in the literature. Those values have been screened, and finally 1266 data were selected. For each fluid, the Guggenheim–Katayama analytical expression was used with two or four adjustable coefficients, except for 1-octene, for which six were needed. As the main result, recommended correlations as a function of temperature are proposed for the 42 alkenes. The proposed correlations provide mean absolute deviations below 0.55 mN/m and mean absolute percentage deviations below 2.7%. Moreover, percentage deviations less than or equal to 8.1% are obtained for almost all the selected data, with the only exceptions being sets of few data for 1,4-pentadiene and dicyclopentadiene, for which there are at least two different sources of data providing different values. In general, the highest deviations are due to this kind of disagreement and not to the poor fitting performance of the correlation model. These new correlations expand the existing collection, including common substances, alcohols, refrigerants, organic acids, n-alkanes, esters, and ethers.