Abstract
Oxidation of soot over a series of bi-noble metals Ru-X (X=Rh, Pd, Ag, Ir, Pt and Au) supported on SiO2 has been conducted in fluidized bed reactor with temperature programmed reaction (TPR) technique. The effects of molar ratio and combination of Ru and X on the Ru-X/SiO2 activity in the soot oxidation have been investigated. The Ru1-y-Pdy/SiO2 (0.1 ≤ y ≤ 0.9) exhibited the high catalytic activity and selectivity to CO2 when the molar ratio is 1:1 (y=0.5). Among Ru-X/SiO2 (X=Rh, Pd, Ag, Ir, Pt and Au), Ru-Pd/SiO2 shows high activity for the soot oxidation in fluidized bed reactor. Compared to soot oxidation in fixed bed reactor, the oxidation of soot was accomplished at low temperature and this can be attributed to the promotion of mass transfer in fluidized bed reactor. [DOI: 10.1380/ejssnt.2011.142]
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