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- W167354469 abstract "Rhodium catalysts with very low weight loadings (0.01 to 0.06%) are used to efficiently reduce the nitrogen oxides in automobile exhaust. Many academic studies, however, are done using catalysts with high weight loadings (1 to 10%). The study reported herein explored differences in activity and surface properties between high and low weight-loaded Rh catalysts before and during NO reduction by CO. Initial and steady-state turnover numbers were found to increase significantly (factor of 7) as weight loading was increased from 0.2% to 12%. At the same time the activation energy decreased from 36 to 24 kcal/mole. Power rate laws determined by varying NO and CO partial pressures were found to be fairly similar for the high and low weight-loaded catalysts. These results seem to indicate that NO reduction is a structure sensitive reaction. The effect of varying the reduction temperature of the catalysts between 200 and 450°C was also explored, but no significant effect was seen on hydrogen uptakes, infrared spectra, initial rates, or steady state rates." @default.
- W167354469 created "2016-06-24" @default.
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- W167354469 date "1987-01-01" @default.
- W167354469 modified "2023-09-25" @default.
- W167354469 title "The Effect of Weight Loading and Reduction Temperature on Rh/Silica Catalysts for no Reduction by co" @default.
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- W167354469 doi "https://doi.org/10.1016/s0167-2991(09)60427-4" @default.
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