ISSN:
1572-879X
Keywords:
Reduction of NO
;
PdO catalysts
;
MoO3 catalysts
;
bimetallic catalysts
;
PdO-MoO3
;
catalysts
;
automotive catalysts
;
automotive pollution control
;
NO x
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The catalytic activity for the reduction of NO by CO of five PdO-MoO3/γ-Al2O3 catalysts is compared in the presence of varying amounts of oxygen at reaction temperatures from 25 to 550 °C. The samples were prepared by different methods and contain about 2% of Mo and 2% Pd. Results are compared with the activities and selectivities of PdO/ γ-A12O3 and PdO-MoO3/γ-Al2O3 containing 2% Pd and 2% Pd + 20% Mo, respectively. All catalysts showed appreciable activity at temperatures between 300 and 550 °C and at stoichiometric ratios,R, of the oxidizing to reducing gases of 0.1 〈R 〈 1.1. The activity of three PdO-MoO3/ γ-A12O3 catalysts with low concentrations of Mo and Pd was found to be significantly higher than the activity of PdO/γ-Al2O3 at 1.1 〈R 〈 1.3 and at temperatures between 300 and 500 °C. The improved activity is ascribed to the interaction of the active metals.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00764343
