Catalytic oxidation of an amorphous carbon black

The role of fuel-borne catalyst in diesel particulate oxidation behavior

“…In their recent work, the same transition metal catalyst can exhibit different chemical states due to modification of the interfacial bond depending on the form of the carbon substrate where the catalyst is located [17]. Ciambelli et al showed the significance of direct contact between soot and the metal oxide, suggesting that soot oxidation is more efficient with tight carbon-catalyst contact [18][19][20]. The importance of lattice oxygen bonded to the metal oxide is highlighted for its role in the reduction reaction by which the metal oxide and soot interact.…”

“…It has been documented that a tiny amount of a transition metal or metal oxide can dramatically increase the rate of oxidation in graphite [11][12][13][14][15], carbon black [16][17][18][19], and diesel soot [20,21]. Following the pioneering work by McKee [11][12][13], Baker et al clarified the morphological and chemical influence of the metal-graphite matrix on the effectiveness of its catalytic attack on the carbonaceous substrate.…”

Diesel soot combustion on Mo/Al2O3 and V/Al2O3 catalysts: investigation of the active catalytic species

“…Proposed mechanisms basically involve a redox mechanism [8,16,20,21], consisting of carbon oxidation by lattice oxygen from the catalyst and reoxidation of the catalyst by oxygen from the gas phase, and oxygen spillover [8,22,23], which consists of dissociation of gasphase oxygen over the catalyst followed by its transfer to the soot surface for reaction. A combination of both mechanisms occurring simultaneously was also proposed [8].…”

Catalytic Combustion of Methane Soot

“…In previous works we reported on the performances of a Cu-V-K based catalyst (137AA) in the combustion of various carbonaceous materials ranging from fullerene to graphite (Ciambelli et al, 1991(Ciambelli et al, , 1994a(Ciambelli et al, , 1994c. As this catalyst is active in the direct oxidation of the carbonaceous matrix of the particulate (Ciambelli et al, 1991), it is a candidale to be employed for the catalytic control of particulate emissions from combustion systems.…”

“…The results of soot combustion confirm previous findings obtained with other carbon materials. Moreover, kinetic data follow a model proposed for the catalytic combustion of amorphous carbon black (Ciambelli et al, 1994a). An extension of this model, incorporating the influence of carbon-catalyst contact on the catalyst performances, has been presented.…”