Tarnishing kinetics of powders with lognormal particle size distributions
- 1 January 1980
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 76, 2229-2236
- https://doi.org/10.1039/f19807602229
Abstract
Equations are derived for the reaction kinetics of powders in which a particle of size D reacts according to dFD/d(tz)=(kz/βD)(1 –βF)m and which have lognormal, truncated lognormal or composite lognormal particle size distributions. This leads to a method for estimating such kinetics for powders with arbitrary particle size distribution. For β= 1 and either linear kinetics (z= 1, m=⅔) or parabolic kinetics (z=½, m= 0.43) lognormal powders with 0.2 < σ < 1.2 will approximately obey the same equation with median size for D and with m and ln k approximately linear functions of σ.Keywords
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