Abstract

Abstract : Experimental measurements on isolated elementary metallic radical oxidation reactions over wide temperature ranges are described. Reactions of importance to advanced propulsion systems are studied. the temperature dependence of the rate coefficients of many of the reactions deviate strongly from the commonly used Arrhenius equation. Therefore, extrapolations, based on this equation, from narrow to wide intervals can not be used. Results for the reaction Al0+C02 yield AlC02+C0 from 450-1300K are given. The rate coefficient expression equals 2 x 10 to the -14th power exp (530/T) 3cc molecule s. The reaction thus has a slight negative temperature dependence. It is concluded that the O-(A10) bond formed has an energy equal to or exceeding 530 kJ/mol, much larger than reported in the literature. A possible reason for this disagreement is discussed. Originator supplied keywords include: Combustion kinetics, High temperature, Metal halides, Metal oxides, Rocket propulsion, and Ramjets.

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