The influence of particle solubility on heterogeneous nucleation in binary vapor mixtures

Petersen, D.; Ortner, R.; Vrtala, A.; Laaksonen, A.; Kulmala, M.; Wagner, P. E.
August 2000
AIP Conference Proceedings;2000, Vol. 534 Issue 1, p135
Academic Journal
Heterogeneous nucleation of binary n-propanol — water vapor mixtures on non-soluble or partially soluble 8nm Ag and NaCl particles has been investigated experimentally. At constant temperature the vapor activities have been stepwise increased and the number of particles activated to condensational growth shows a comparatively steep increase until all particles have been activated. Onset activities were obtained for various mixing ratios of the binary vapor mixtures. In contrast to homogeneous nucleation, for binary heterogeneous nucleation only a conucleation without significant mutual enhancement was observed. Heterogeneous nucleation calculations based on Fletcher theory using experimentally obtained contact angles have been performed. Satisfactory agreement of the slopes of the nucleation probability curves was observed. However, considerable deviations between experimental and theoretical onset activities indicate problems of the binary nucleation theory based on the capillarity approximation. For NaCl particles and water rich mixtures the Köhler theory is in good agreement with the experimental data. On the other hand, for n-propanol rich mixtures and NaCl particles the heterogeneous nucleation calculations based on Fletcher theory provide a reasonable approximation of the experimental data. It appears that neither Fletcher nor Köhler theory are applicable to NaCl particles in the region of transition from water rich to n-propanol rich mixtures.


Related Articles

  • Sub-micron atmospheric aerosols in the surroundings of Marseille and Athens: physical characterization and new particle formation. Petäjä, T.; Kerminen, V-M.; Dal Maso, M.; Junninen, H.; Koponen, I. K.; Hussein, T.; Aalto, P. P.; Andronopoulos, S.; Robin, D.; Hämeri, K.; Bartzis, J. G.; Kulmala, M. // Atmospheric Chemistry & Physics;2007, Vol. 7 Issue 10, p2705 

    The properties of atmospheric aerosol particles in Marseille and Athens were investigated. The studies were performed in Marseille, France, during July 2002 and in Athens, Greece, during June 2003. The aerosol size distribution and the formation and growth rates of newly formed particles were...

  • Ion and nano-particle measurement in ion-induced nucleation process. Okuyama, Kikuo; Shimada, Manabu; Kim, Chan S. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p665 

    Ion-induced nucleation is the process leading supersaturated vapors to condense on ions and has become an attractive research subject to understand the gas-to-particle conversion process involving generation of ions and nanometer sized particles (nano-particles). In order to measure the mobility...

  • Measurement of expected nucleation precursor species and 3-500-nm diameter particles at Mauna Loa... Weber, R.J.; McMurry, P.H. // Journal of the Atmospheric Sciences;6/15/95, Vol. 52 Issue 12, p2242 

    Analyzes the atmospheric measurements of expected homogeneous nucleation precursors and aerosols that were made at the Mauna Loa Observatory in Hawaii. Large molecular clusters and ultrafine particles; Molecular precursor vapors and aerosols; Calculation of particle growth and formation rates.

  • Analytical prediction of homogeneous nucleation in rapidly expanding pure vapours. Young, J. B.; Huang, L. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p884 

    The paper describes an analytical method for predicting the maximum vapour subcooling and final droplet number distribution in a rapidly expanding pure vapour undergoing homogeneous nucleation. This type of flow is characterised by very high nucleation rates which are quenched by the release of...

  • Characterization of aerosol particles by their heterogeneous nucleation: Activity at low supersaturations with respect to water and various organic vapors. Holla¨nder, W.; Dunkhorst, W.; Windt, H. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p732 

    An expansion type cloud condensation nucleus counter/Kelvin spectrometer has been operated with water and various organic liquids. Heterogeneous nucleation is markedly different depending on the particle/vapor material combination.

  • Sticking probability and uptake coefficient—a quantitative comparison. Kulmala, M.; Wagner, P. E. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p519 

    An analytical formula, where the uptake coefficient is given as a function of mass accommodation coefficient, has been derived. The uptake coefficient is seen always to be smaller than or equal to the mass accommodation coefficient. The independence of the uptake coefficient on mass...

  • Thermodynamics and nucleation studies of III-nitride materials grown from vapor phase. Varadarajan, E.; Dhanasekaran, R.; Ramasamy, P. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p319 

    The initial stage of growth of III-Nitrides ternary compound on binary substrate were analysed using the classical heterogeneous nucleation theory, incorporating lattice mismatch between the grown alloy and the substrate. The explicit expression for the lattice mismatch induced supercooling for...

  • MD simulation of heterogeneous vapor nucleation on a solid surface. Kholmurodov, K. T.; Yasuoka, K.; Zeng, X. C. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p253 

    Molecular dynamics simulations of nucleation of a supersaturated Lennard-Jones vapor confined between parallel solid walls have been performed. The walls in the system, unlike the structure-less one [K.Yasuoka, G. T. Gao, and X. C. Zeng, J. Chem. Phys. 112, pp.4279-4285 (2000)], are simulated in...

  • Comments on kinetics and thermodynamics of condensations under homogeneous conditions. Bauer, S. H.; Zhang, Y-.X; Wilcox, C. F. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p159 

    © 2000 American Institute of Physics.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics