Accession Number : AD0726728

Title :   Instabilities in Coupled Chemical Reactions with Pressure-Dependent Rate Coefficients.

Descriptive Note : Technical rept.,

Corporate Author : PURDUE UNIV LAFAYETTE IND PROJECT SQUID HEADQUARTERS

Personal Author(s) : Ortoleva,Peter J. ; Ross,John

Report Date : JUN 1971

Pagination or Media Count : 56

Abstract : Fluctuations in a chemically reacting system under steady state conditions normally decay in time. The enhancement of fluctuations is known, however, to be possible for some reaction mechanisms with auto-catalytic or cross-catalytic reaction steps. An investigation was made of the phenomena which arise on considering partial molar volume changes and the consequent pressure dependence of rate coefficients in certain reactions. It is shown that such systems may become unstable not only to concentration fluctuation, as in earlier work, but also to mechanical disturbances (i.e. pressure fluctuations). In the analysis allowance is made for the possibility of local disturbances in density and velocity as well as in composition.

Descriptors :   (*REACTION KINETICS, OSCILLATION), CHEMICAL EQUILIBRIUM, CATALYSIS, PRESSURE, EQUATIONS OF MOTION, STABILITY, ACOUSTICS

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE