Accession Number : AD0264973

Title :   GENERATION OF SUPERSONIC DISSOCIATED AND IONIZED NONEQUILIBRIUM STREAMS. ENERGY UTILIZATION AND THE DETERMINATION OF ATOM CONCENTRATIONS.

Corporate Author : AEROCHEM RESEARCH LABS INC PRINCETON N J

Personal Author(s) : Rosner,Daniel E.

Report Date : JUL 1961

Pagination or Media Count : 1

Abstract : Three distinct methods to determine atom concentrations in the nonequilibrium supersonic jet of activated N emerging from an unconventional direct current glow discharge are evaluated. The accuracy of each method is discussed and compared, both as to the ability to predict trends as well as absolute values. The first is based on over-all power and pressure measurements alone and is capable only of setting an upper limit to the actual atom concentration. The second is classified as differential catalytic thermometry, and relies on the use of differential thermochemical effects for atom recombination reactions on surfaces as a basis of inferring local atom concentrations in the gas phase. The results of a series of upstream mixing experiments support the view that the catalytic probes respond to the same component of active N that is depleted by chemical reaction with unsaturated hydrocarbon gases (ethylene, propylene), the most likely of these species being ground state N atoms. Finally, measurements of the limiting amounts of HCN produced by the reaction of active N with propylene have been used to estimate the dissociation level in the discharge products. Each of the methods leads to dissociatio levels of the order of 1% (by mass) in N. (Author)

Descriptors :   *HYDROGEN, *PLASMA JETS, ATOMS, DENSITY, DETERMINATION, DISSOCIATION, ELECTRIC FILTERS, FREE RADICALS, GAS IONIZATION, GLOW DISCHARGES, INSTRUMENTATION, PRODUCTION, RECOMBINATION REACTIONS, THERMOCHEMISTRY

Distribution Statement : APPROVED FOR PUBLIC RELEASE