Single Pulse Shock Tube Study of the Reaction Between Nitrogen Dioxide (NO₂) and Carbon Monoxide (CO)

Abstract

The reaction between NO₂ and CO has been studied in a single pulse shock tube in the temperature range 950-1500 °K and at a total concentration of approximately 2.5× 10⁻⁵ moles/cc. Both the measured ratios of ([CO₂]/[CO])1 and ([NO]/[NO₂])1 have been used in separate series of experiments to examine the reaction

The Arrhenius frequency factor and activation energy for ka were found to be 10^13.51±0.25 cc/mole-sec and 32000± 1300 cal/mole, respectively. This result for k ₁₂ is compared to literature values and the favorable comparison is taken as an indication that the modified single pulse shock tube analysis employed in this study leads to more reliable chemical kinetic data. The analysis methods include a special test mixture filling technique and a relative concentration at time solution for determining the final species concentration. These techniques reduce variation in the shocked gas reaction time and avoid concentration measurement errors associated with volume expansion sampling in a shock tube.

Additional information

Notes on contributors

D. MILKS

Present Address: Union Carbide Technical Center, South Charleston, West Virginia.

T. N. ADAMS

Present Address: Mechanical Engineering Department, University of British Columbia, Vancouver, B.C., Canada.