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Abstract  

Relationships between average degree of transformation and time of dissociation were derived for polydisperse granular materials with account to the type of grain size distribution. It has been checked, under what conditions the kinetic curves obtained by numeric solution of those relationships may be described in terms of equations D1 α2=kt
\documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{upgreek} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} $$\frac{1}{2}$$ \end{document}
, F2 [1/(1 - α) - 1 =kt] and F3 [1/(1 - α)2 - 1=kt].
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Abstract  

The kinetics of thermal dissociation was studied for polydisperse systems (naturally occurring calcite and precipitated calcium carbonate) with normal and Rosin-Rammler-Sperling distributions. Experimental rate constants at selected temperatures and activation energies were calculated. The experimental results (kinetic curves) were compared with the theoretically derived curves and the usability of the selected kinetic models for description of the kinetics in such systems was estimated.

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