Modelling the Sublimation-Desublimation Processes for Production of Ultrafine Powders

The purpose of this work is to establish the theoretical
foundations for calculating and designing the sublimationcondensation
processes in chemical apparatuses which are intended
for production of ultrafine powders of crystalline and amorphous
materials with controlled fractional composition. Theoretic analysis
of the primary processes of nucleation and growth kinetics of the
clusters according to the degree of super-saturation and the
homogeneous or heterogeneous nature of nucleation has been carried
out. The engineering design procedures of desublimation processes
have been offered and tested for modification of the Claus process.

• V. Golubev
• A. Dosmakanbetova
• A. Brener

• Desublimation
• controlled fraction composition
• nucleation
• ultrafine powders.

<p>[1] Lamminen E., Isherwood H., Effect of process parameters on ultrafine
and fine particles emissions.Chemical Engineering Transactions,
Vol.17, 2009, pp. 729-735.
[2] Kashchiev D., Nucleation: Basic Theory with Applications, Butterworth
Heinemann, Oxford, UK, 2000.
[3] Farjoun Y., Neu J.C., Exhaustion of nucleation in a closed system,
Phys. Rev.,E78, 2008, pp.1-7.
[4] Schmelzer J.W. Eds., Nucleation Theory and Applications, Willey-
VCH Verlag GmbH &amp; Co.KGaA, Weinheim, 2005.
[5] Pack D.J., Elemental Sulphur Formation in Natural Gas Transmission
Pipelines, PhD Thesis, University of Western Australia, 2005.
[6] Wattis J. A. D., An introduction to mathematical models of
coagulation-fragmentation processes: a discrete deterministic meanfield
approach, Physica D, 222, 2006, pp. 1-20.
[7] Dosmakanbetova A., Methodology of Calculating and Designing the
Sublimation-Condensation Apparatuses for Ultrafine Powders
Production, PhD Thesis, State University of South Kazakhstan, 2010.</p>