title: Oxidation of diesel soot on binary oxide CuCr(Co)-based monoliths.
abstract: Binary oxide systems (CuCr2O4, CuCo2O4), deposited onto cordierite monoliths of honeycomb structure with a second support (finely dispersed Al2O3), were prepared as filters for catalytic combustion of diesel soot using internal combustion engine's gas exhausts (O2, NOx, H2O, CO2) and O3 as oxidizing agents. It is shown that the second support increases soot capacity of aforementioned filters, and causes dispersion of the particles of spinel phases as active components enhancing thereby catalyst activity and selectivity of soot combustion to CO2. Oxidants used can be arranged with reference to decreasing their activity in a following series: O3≫NO2>H2O>NO>O2>CO2. Ozone proved to be the most efficient oxidizing agent: the diesel soot combustion by O3 occurs intensively (in the presence of copper chromite based catalyst) even at closing to ambient temperatures. Results obtained give a basis for the conclusion that using a catalytic coating on soot filters in the form of aforementioned binary oxide systems and ozone as the initiator of the oxidation processes is a promising approach in solving the problem of comprehensive purification of automotive exhaust gases at relatively low temperatures, known as the "cold start" problem.
authors: L.V. Pisarzhevskii Institute of Physical Chemistry, National Academy of Sciences of Ukraine, 31 Prospekt Nauky, 03028 Kyiv, Ukraine. Electronic address: soloviev@inphyschem-nas.kiev.ua.
authors: Sergiy O
authors: SO
authors: Soloviev
authors: L.V. Pisarzhevskii Institute of Physical Chemistry, National Academy of Sciences of Ukraine, 31 Prospekt Nauky, 03028 Kyiv, Ukraine.
authors: Andriy Y
authors: AY
authors: Kapran
authors: L.V. Pisarzhevskii Institute of Physical Chemistry, National Academy of Sciences of Ukraine, 31 Prospekt Nauky, 03028 Kyiv, Ukraine.
authors: Yaroslava P
authors: YP
authors: Kurylets
mesh_terms: D000393:Air Pollutants / Q000737:chemistry*; D000397:Air Pollution / Q000517:prevention & control*; D000537:Aluminum Oxide / Q000737:chemistry; D017608:Chromium Compounds / Q000737:chemistry; D003300:Copper / Q000737:chemistry; D052918:Environmental Restoration and Remediation / Q000379:methods*; D008277:Magnesium Oxide / Q000737:chemistry; D008903:Minerals / Q000737:chemistry; D010084:Oxidation-Reduction; D053260:Soot / Q000737:chemistry*; D001335:Vehicle Emissions / Q000032:analysis
chemical_list: D000393:Air Pollutants; D017608:Chromium Compounds; D008903:Minerals; D053260:Soot; D001335:Vehicle Emissions; C560917:cobaltite; C111130:spinell; D008277:Magnesium Oxide; D003300:Copper; D000537:Aluminum Oxide
keywords: Catalyzed diesel particulate filters; Cordierite monoliths; CuCo(2)O(4) catalytic coatings; CuCr(2)O(4); Oxidizing agents; Ozone; Second support