Abstract
ABSTRACT The oxidation of Spherocarb carbon particles is studied in a research-scale fluidized bed reactor (FBR) over the temperature range of 630K-130OK at atmospheric pressure. The reactor uses nitrogen carrier gas to which various amounts of oxidizer (from 6%-30% by volume) are added. Carbon loading (spherical 60/80 mesh spherocarb particles) is kept low so that the reactor remains nearly isothermal overall. A procedure for a non-intrusive approximation of average particle temperature rise was developed and indicated that particle temperatures do not rise more than 20 K above the bed temperature. Oxidation rates are determined by measuring the bed temperature and the time dependent formation of gas-phase carbon oxides. Assuming a first order dependence on oxidizer concentration, overall rates of oxidation for various pure oxidizers in nitrogen are determined. The overall activation energy for O2 (37 ± 2 kcal/mole) corresponds well with previously published values. Overall activation energies for CO2 (6...
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