Propandiol vapor nucleation rates

Anisimov, M. P.; Nasibulin, A. G.; Timoshina, L. V.; Koropchak, J. A.
August 2000
AIP Conference Proceedings;2000, Vol. 534 Issue 1, p99
Academic Journal
Consideration of vapor-gas nucleation as binary vapor nucleation (instead widely used the one comportent approximation for nucleation of this system now) may lead the progress in the development of nucleation theory. Observations of phase transitions initiated by the carrier gas in the critical embryos of condensate can be a sufficiently convincing argument in this discussion. In order to confirm the role of the carrier gases received in the recent research, in present study 1,2-propanediol and 1,3-propanediol vapor nucleation rates were measured. Carbon dioxide (T[sub c]=304.2 K, P[sub c]=7.39 MPa) and sulfur hexafluoride (T[sub c] = 318.7 K, P[sub c]= 3.75 MPa) were chosen as the carrier gases, because of their low and convenient critical temperatures, T[sub c], and critical pressures, P[sub c]. Analysis of the experimental data shows that gas-carrier molecules are involved in new phase embryo formation. Vapor nucleation of investigated substances in a carrier gas atmosphere can be considered as nucleation of binary system.


Related Articles

  • The homogeneous nucleation of a vapor to its solid phase: Does water nucleation change at 40 °C? Katz, Joseph L.; Kole, Thomas P. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p35 

    The homogeneous nucleation of water is investigated in a downward diffusion cloud chamber. Nucleation rates are measured as a function of supersaturation to determine whether homogeneous nucleation of water below -40°C occurs via vapor to liquid or vapor to solid nucleation.

  • Analysis of the kinetics of phase transformations; roles of nucleation index and temperature dependent site saturation, and recipes for the extraction of kinetic parameters. Liu, F.; Sommer, F.; Mittemeijer, E. J. // Journal of Materials Science;Jan2007, Vol. 42 Issue 2, p573 

    A general analytical model for the description of phase transformation kinetics, with kinetic parameters that are time and temperature dependent, can be given that exhibits the roles of (i) the nucleation index, a, and (ii) the temperature dependence of site saturation. Recipes for...

  • Kinetics of transformation with nucleation and growth mechanism: Special consideration of... Ge Yu; Lee, S.T.; Lai, J. K. L.; Ngai, L. // Journal of Applied Physics;1/1/1997, Vol. 81 Issue 1, p89 

    Describes the kinetics of phase transformation with nucleation and growth mechanisms. Crystallographic relationship in the epitaxial growth; Influence of the shape factor on the kinetics; Determination of the distribution during deposition.

  • On the theory of fog. Marchenko, V. I. // JETP Letters;7/10/96, Vol. 64 Issue 1, p66 

    It is pointed out that in first-order phase transitions nucleation stops when the supersaturation decreases by a small amount. A simple quantitative description of the next stage of the kinetics of the transition — the growth stage — is proposed. This stage lasts much longer than...

  • Nucleation in superheated liquid argon--krypton solutions. Baidakov, V.G.; Kaverin, A.M.; Boltachev, G.Sh. // Journal of Chemical Physics;4/1/1997, Vol. 106 Issue 13, p5648 

    Reports on nucleation-rate measurements in metastable liquid argon-krypton solutions over a wide temperature and concentration range. Consideration of the size effect in nucleation in the framework of the Van-der-Waals, Cahn-Hilliard method; Kinetics of a first order phase transition in binary...

  • Metastable phase decay on a wide spectrum of the heterogeneous centers activities. Kurasov, Victor // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p257 

    © 2000 American Institute of Physics.

  • Initiation of a phase transition by preexisting nuclei. Shneidman, Vitaly A.; Hänggi, Peter // Journal of Chemical Physics;7/15/1994, Vol. 101 Issue 2, p1503 

    Preexisting nuclei are often invoked in situations where the observed kinetics of a phase transition is much faster than one would expect from the classical theory of homogeneous nucleation. We examine analytically the time-dependent effects produced by such nuclei. Corrections to the number of...

  • A kinematical model of homogeneous phase-transition kinetics involving the simultaneous growth of multiple phases. Markworth, Alan J. // Journal of Chemical Physics;2/15/1991, Vol. 94 Issue 4, p3282 

    A model is developed for homogeneous phase-transition kinetics in a system for which multiple secondary phases are simultaneously growing from a supersaturated primary phase. The approach is entirely kinematical in nature, with no account being taken of the actual physics of the...

  • Understanding the sensitivity of nucleation kinetics: A case study on water. Kathmann, Shawn M.; Schenter, Gregory K.; Garrett, Bruce C. // Journal of Chemical Physics;3/22/2002, Vol. 116 Issue 12, p5046 

    Small atomic or molecular clusters provide the bridge between vapor and liquid phases. Nucleation is a rare event process by which clusters of a new phase are produced. This process is inherently dynamic and as such the new phase cannot exist until an activation barrier is surmounted. Dynamical...


Read the Article


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

Try another library?
Sign out of this library

Other Topics