publication . Article . 2006

Kinetic model for transformation from nano-sized amorphous $TiO_2$ to anatase

Madras, Giridhar; McCoy, Benjamin J;
Open Access
  • Published: 01 Dec 2006
  • Publisher: American Chemical Society
  • Country: India
Abstract
We propose a kinetic model for the transformation of nano-sized amorphous $TiO_2$ to anatase with associated coarsening by coalescence. Based on population balance (distribution kinetics) equations for the size distributions, the model applies a first-order rate expression for transformation combined with Smoluchowski coalescence for the coarsening particles. Size distribution moments (number and mass of particles) lead to dynamic expressions for extent of reaction and average anatase particle diameter, which are compared with experimental data [Chem. Mater. 2002, 14, 4145]. Data at different temperatures yield activation energies for coalescence and transformat...
Subjects
free text keywords: Chemical Engineering
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