Kinetics of reaction between nitrogen mono-oxide and carbon mono-oxide over palladium–alumina and ruthenium–alumina catalysts
- 1 January 1976
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 21,p. 2249-2253
- https://doi.org/10.1039/dt9760002249
Abstract
The kinetics of reaction between CO and NO overalumina-supported palladium and ruthenium catalysts have been studied in a closed system by monitoring gas composition mass spectrometrically. Over the palladium catalyst the reaction may be represented by (i) in the range 300–450 °C (at total pressures up to ca. 10 kN m–2 and dpCO2 /dt= 2.0 × 106 exp (–91.2 ± 19 kJ mol–1/RT)pNO 2/PCO molecules cm–2 s–1(1), forpCO/pNO between 1 and 1.6. Over the ruthenium catalyst the rate is given by (ii) in the range 250–350 °C and dpCO2 /dt= 6.6 × 108 exp (–82.4 ± 15 kJ mo–1/RT) PNO 0 PCO 0(ii) for PCO/PNO between 1 and 5. When PCO/PNO is greater than 5 for the ruthenium-catalyzed reaction the rate changes to dPCO2 =kpNOPCO 0. The kinetic behaviour agrees with the concept that, in the presence of CO–NO mixtures, palladium catalysts tend to favour adsorption of CO, whereas ruthenium catalysts favour adsorption of NO.Keywords
This publication has 0 references indexed in Scilit: