Homogeneous nucleation kinetics

Vapor Phase Homogeneous Nucleation of Higher Alkanes: Dodecane, Hexadecane, and Octadecane. 2. Corresponding States and Scaling Law Analysis

“…2 Scaled models for homogeneous nucleation provide useful ways of correlating the experimental data for a series of different materials with their molecular properties. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] In particular, scaling models deal with the correlation of critical supersaturations (S c (T)), supersaturations required for the onset of nucleation at a rate of 1 drop/cm 3 /s) and nucleation rates, J(S,T), of wide classes of substances over wide ranges of experimental conditions using reduced (nondimensional) thermodynamic parameters. These correlations lead to identifying universal temperature dependencies, which complicate the extraction of general patterns from the nucleation data of individual substances.…”

“…These correlations lead to identifying universal temperature dependencies, which complicate the extraction of general patterns from the nucleation data of individual substances. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Systematic studies of homogeneous nucleation of different classes of compounds with a variety of molecular properties are desirable in order to test nucleation theories. Such studies provide insight into the role of different molecular properties in the nucleation process.…”

Scaled models for nucleation

“…It was this seemingly unwieldy temperature dependence of the classical kinetic prefactor which prompted Rasmussen and Babu [13] to comment that a theoretical explanation for the scaling law of Eq. (1) for ln S cr was lacking.…”

“…(25). The values used for Ω are [13]: 2.35 for nonane, octane and n-butylbenzene, 1.5 for water and ethanol, and 2.0 for SF₆. For the remaining substances the ideal gas value 2.12 is used [15].…”

“…[3] Rasmussen and Babu [13,14] made use of Eq. (1) to illustrate a crucial correlation between C and the Eötvös constant [15].…”