Catalytic oxidation of soot particulates over MnOx-CeO2 oxides prepared by complexation-combustion method

Effect of Preparation Method and Calcination Temperature on LaCoO3 Perovskite Catalyst for Diesel Soot Oxidation

“…It can be seen from the table that the various perovskite have low specific surface area (7-15m 2 /g) and Average pore size (13)(14)(15)(16)(17)(18)(19)(20) Å), which is in expected range considering the high synthesis temperature in accordance with references [32,33]. The catalysts formed at 600 o C showed the highest surface area irrespective of the preparation methods.…”

“…The noble metal catalysts are expensive and due to their scarcity to further price increase upon increasing demand. As an alternative to noble metals, recently oxides of transition metal, lanthanide group and alkaline earth metal are widely studied for soot oxidation [14][15][16][17]. Neeft et al [18] arranged few single-component metal oxides for their relative activities in the oxidation of carbonaceous material in following order: La > Mn > Sb > Bi > Ca > Cu > Ag > Ni > Cr > Zr > Ba > Zn.…”

Synthesis of mixed Mn–Ce–Ox one dimensional nanostructures and their catalytic activity for CO oxidation

“…The addition of the trivalent manganese element in the CeO 2 crystal lattice leads to the oxygen vacancy due to the charge difference, and the MnO x considerably decreased the reduction temperature of CeO 2 . The capability to activate oxygen through the oxygen exchange between O 2 in gas phase and lattice oxygen species in MnO x -CeO 2 oxide contributed to the high catalytic activity for the reaction [31]. The better CO catalytic activity of MnCe-O x composites can be ascribed to the fact that CO strongly adsorbs onto more reduced Mn sites of 40Mn-CeO 2 , resulting in less active site for adsorbing surface oxygen O 2 , which is activated to O À x anion radicals rapidly by oxygen vacancies.…”

“…Although the doped or composed CeO 2 systems have been investigated, the doping or composing with manganese to the ceria is still to be developed. As compared with pristine manganese oxide and ceria catalysts, integrating manganese oxides with ceria can further enhance the redox behaviour for CO [27][28][29][30][31]. Thus, catalytically active Mn and Ce sites can cooperatively enhance the catalytic activity.…”

Soot formation and oxidation during bio-oil gasification: experiments and modeling

“…Quantitative prediction of soot growth and subsequent oxidation mechanisms are critical to the development of approaches to control soot emissions [6,7]. Soot is produced in pyrolysis and combustion/gasification systems when conditions are such as to allow gas-phase condensation reactions of the fuel.…”