Accession Number : ADA325712

Title :   Heterogeneous Chemistry in Solid Rocket Motor Plumes.

Descriptive Note : Final technical rept. 15 Jul-14 Dec 96,

Corporate Author : CALIFORNIA UNIV LOS ANGELES DEPT OF CHEMISTRY AND BIOCHEMISTRY

Personal Author(s) : Felker, Peter M.

PDF Url : ADA325712

Report Date : MAR 1997

Pagination or Media Count : 18

Abstract : Reaction rates of ozone decomposition and adsorption/desorption rates of HCl on aluminum oxide (alumina) particles were measured by a new technique involving real-time ultraviolet absorption spectroscopy in a static reactor. Reaction probabilities eta are reported for ozone on alpha-alumina, gamma-alumina, and chromatographic alumina (hydoxylated alumina), respectively, over the temperature range -60 to 200 deg C. These measurements expand on previous measurements from this group using a flow tube reactor. The adsortion/desorption kinetics is a new effort that addresses the key issue of whether heterogeneous chemistry, such as the reaction HCl + ClONO2 --> Cl2 + HNO3, on alumina particles is a significant reaction mechanism for global stratospheric ozone depletion.

Descriptors :   *CHEMISTRY, *HETEROGENEITY, *EXHAUST PLUMES, *OZONE, *SOLID PROPELLANT ROCKET ENGINES, DEPLETION, REACTION KINETICS, REACTION TIME, PROBABILITY, PARTICLES, ULTRAVIOLET SPECTROSCOPY, ALUMINUM OXIDES, ABSORPTION SPECTRA, DESORPTION, DECOMPOSITION, STRATOSPHERE, ROCKET EXHAUST, CHROMATOGRAPHS.

Subject Categories : Inorganic Chemistry
      Solid Propellant Rocket Engines
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE