Three-way catalytic activity of alumina-supported copper catalysts modified by rhodium
Résumé
The three-way catalytic activity of a 4.7% Cu/Al2O3 catalyst modified by addition of small amounts of rhodium (from 100 to 2000 ppm) was measured up to 550°C, in steady state or oscillatory conditions (0.1 Hz), using a synthetic gas containing N2, O2, CO, C3H6 and NO. No synergetic effect in the catalytic properties has been observed between Cu and Rh, as the CO, NO and C3H6 conversions at low temperature increase with rhodium concentration. At high temperature, the use of copper which exhibits oxygen storage properties improves the CO and NO conversion by moving up the limitations observed in the conversion under oscillatory conditions.
Domaines
Catalyse
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Three-way catalytic activity of alumina supported copper catalysts modified by rhodium HAL.pdf (387.49 Ko)
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