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Kinetic model for hydrocarbon-assisted particulate boron combustion

✍ Scribed by R. C. Brown; C. E. Kolb; S. Y. Cho; R. A. Yetter; F. L. Dryer; H. Rabitz

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
823 KB
Volume
26
Category
Article
ISSN
0538-8066

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✦ Synopsis

A kinetic model is presented to describe the high temperature (1800 K < T < 3000 K) surface oxidation of particulate boron in a hydrocarbon combustion environment. The model includes a homogeneous gas-phase B/O/H/C oxidation mechanism consisting of 19 chemical species and 58 forward and reverse elementary reactions, multi-component gas-phase diffusion, and a heterogeneous surface oxidation mechanism consisting of 'elementary' adsorption and desorption reaction steps, Thermochemical and kinetic parameters for the surface reactions are estimated from available experimental data and/or elementary transition state arguments. The kinetic processes are treated using a generalized kinetics code, with embedded sensitivity analysis, for the combustion of a one-dimensional (particle radius), spherical particle. Model results are presented for the oxidation of a 200 p m boron particle in a JP-4/air mixture at ambient temperatures of 1400 K and 2000 K. These results include temperature and gas-phase species profiles as a function of radial distance and particle burning rates.

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