Catalysts based on complex oxides with fluorite and perovskite structures for soot removal from the exhaust gas of diesel engines
T. G. KUZNETSOVA1, V. A. SADYKOV1, V. A. MATYSHAK2, L. CH. BATUEV1 AND V. A. ROGOV1
1Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences,
Prospekt Akademika Lavrentyeva 5, Novosibirsk 630090 (Russia) E-mail: tgkuzn@catalysis.ru 2Semenov Institute of Chemical Physics, Russian Academy of Sciences,
Ul. Kosygina 4, Moscow 117977 (Russia)
Pages: 775-781
Abstract
Soot oxidation reactions are investigated in the mixture O2 + helium and O2 + NO2 + helium in the presence of substituted perovskites based on lanthanum manganite and modified fluorites based on solid solution Ce-Zr-O, including those promoted with a small amount of platinum. It was shown that the efficiency of soot oxidation is higher in the mixture containing nitrogen dioxide. It was established that the presence of weakly bound surface oxygen is necessary to initiate soot oxidation, while the developed process of soot oxidation requires the mobility of lattice oxygen.
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