Numerical study of MgO powder synthesis by thermal plasma

S. L. Girshick, Chia Pin Chiu

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19 Scopus citations

Abstract

Numerical calculations are presented in which homogeneous nucleation and growth of MgO particles in a thermal plasma reactor is simulated. The physical environment involves continuous cooling from very high temperatures. The numerical model involves a solution of the aerosol general dynamic equation coupled to a gas phase chemical kinetics calculation for generation of MgO monomers. The results indicate that the number of particles nucleated is a function of initial Mg concentration and of cooling rate in the nucleation region. The results are little affected if the assumed chemical rate constants are within one order of magnitude of upper-bound estimates. If, however, the rate constants are a factor of 100 lower than the estimates a large change is observed in the final results. In that case surface reactions are likely to play a prominent role in particle growth.

Original languageEnglish (US)
Pages (from-to)641-650
Number of pages10
JournalJournal of Aerosol Science
Volume21
Issue number5
DOIs
StatePublished - 1990

Bibliographical note

Funding Information:
Acknowledgements --Fhls work was supported by the National Sc{ence Foundation under Grant NSF CBT-8805934, by the Umversltv of Minnesota Graduate School and by the Minnesota Supercomputer lnst)tu)e

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