Accession Number : AD0622388

Title :   DETECTION OF FREE HYDROGEN AND OXYGEN ATOMS IN A RAREFIED FLAME OF CARBON MONOXIDE AND OXYGEN MIXTURE IN PRESENCE OF SMALL ADMIXTURES OF ETHYLENE,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Azatyan,V. V. ; Gershenzon,Yu. M. ; Nalbandyan,A. B. ; Yuan,Tsuy-Men

Report Date : 17 SEP 1965

Pagination or Media Count : 7

Abstract : The investigation was conducted to check the mechansim of combustion of carbon monoxide in presence of ethylene by detecting free oxygen and hydrogen atoms in it and by measuring their concentration. Experiments were conducted with a stoichiometric mixture of carbon monoxide and oxygen, containing from 0.09 to 2.9% of ethylene. The temperature of the experiments was 670 - 675 degrees, pressure -5 mm Hg. Volumetric rate of the stream was 25 cu cm/sec at normal conditions, which corresponded to a linear rate, equaling 4.4 m/sec under flame conditions. In these conditions EPR signals of hydrogen and oxygen atoms were registered. Concentrations of H and O atoms with increase in ethylene content in the mixture rise at first and then decrease. The hydrogen and oxygen concentration is comparable in value. The initial content of ethylene, at which the concentration of oxygen atoms is maximum, is close to the ethylene concentration, at which the lower limit of spontaneous ignition of the mixture is minimum (0.2%). With a rise in temperature the concentrations of H and O atoms increase, indicating that combustion under experimental conditions is not much greater.

Descriptors :   (*CARBON COMPOUNDS, MONOXIDES), (*COMBUSTION, CARBON COMPOUNDS), OXYGEN, HYDROGEN, ATOMS, FLAMES, PARAMAGNETIC RESONANCE, TEMPERATURE, IGNITION, REACTION KINETICS, USSR

Distribution Statement : APPROVED FOR PUBLIC RELEASE