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Kinetic model for hydrocarbon‐assisted particulate boron combustion
Author(s) -
Brown R. C.,
Kolb C. E.,
Cho S. Y.,
Yetter R. A.,
Dryer F. L.,
Rabitz H.
Publication year - 1994
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550260302
Subject(s) - chemistry , combustion , elementary reaction , desorption , particle (ecology) , boron , diffusion , kinetic energy , hydrocarbon , chemical reaction , adsorption , thermodynamics , reaction mechanism , kinetics , chemical kinetics , aerosol , organic chemistry , catalysis , physics , oceanography , quantum mechanics , geology
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 μm 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. © 1994 John Wiley & Sons, Inc.