Estimation of the sauter mean diameter for biodiesels by the mixture topological index
2011
Shu, Qing | Gao, Jixian | Liao, Yuhui | Wang, Dezheng | Wang, Jinfu
A pure component topological index was integrated with the modified Grunberg–Nissan or the modified Dalton-type mass‑average equation to calculate the mean topological index χₘ ,₁ or χₘ ,₂ of five biodiesel fuels (peanut, canola, coconut, and palm, soybean oil). Then, the χₘ ,₁ or χₘ ,₂ was respectively related with the SMD values of biodiesel fuels (taken from the literature, at 313 K), and two regression equations were obtained. The regression equation derived from χₘ ,₁ has a higher predictive accuracy than the regression equation derived from χₘ ,₂, and the deviations of these two regression equations were within 1.73% and 1.87%, respectively. Furthermore, a regression equation derived from the correlation of χₘ ,₁ and SMD was used to calculate the SMD values of biodiesel fuels (at 353 K), and the deviations were within 0.78%. Three types of hypothetical biodiesel fuels were investigated to know the effect of the molecular structure (carbon number and unsaturated bond) on the SMD. A suitable material for the preparation of a biodiesel having the comparable atomization with the diesel no.1 or no.2 will be composed of such components (low carbon number and more unsaturated bonds).
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