Accession Number : AD0728638

Title :   The Shock Tube Isomerization of Cyclopropane with Infrared Analysis,

Corporate Author : AEROSPACE RESEARCH LABS WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Dorko,Ernest A. ; Grimm,Ulrich ; Mueller,Gerhard ; Scheller,Karl

Report Date : MAY 1971

Pagination or Media Count : 34

Abstract : In a continuing effort to develop kinetic analyses in shock tubes, the isomerization of cyclopropane to propylene was investigated. Three aspects of the problem were investigated: the theoretical analysis, the experimental infrared method of analysis, and the mathematical analysis. The test gas mixtures ranged from 0.1 to 5% cyclopropane in Argon. The temperature range was 1000 - 1350K. Kinetic measurements were made by means of infrared emission measurements at 4.79 microns. This band corresponds to the V5+V10 combination band in the IR absorption spectrum of cyclopropane. A plot of the logarithm of the intensity of emission versus time was prepared. It was discovered that the rate constants determined show a dependence on the cyclopropane concentration although they are independent of total or argon concentration. A discussion is given which indicates that the conventional steady-state assumption may not be valid for reactions in a shock tube. (Author)

Descriptors :   (*CYCLOPROPANES, *MOLECULAR ISOMERISM), REACTION KINETICS, SHOCK TUBES, CHEMICAL REACTIONS, INFRARED SPECTROSCOPY

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE