FIELD: chemistry.
SUBSTANCE: invention relates to composition for purification of exhaust gases based on cerium, zirconium and tungsten. Claimed composition has the following weight contents, expressed in oxide: cerium oxide - from 5 to 30%, tungsten oxide - from 2 to 17%, the remaining part - zirconium oxide. After ageing at 750°C in air atmosphere with 10% of water it has two-phase crystallographic structure, containing tetragonal phase of zirconium oxide and monoclinic phase of zirconium oxide, without presence of crystalline tungsten-containing phase. Claimed invention also relates to method of obtaining such composition, catalytic system, containing said composition, as well as to methods of processing gas for conversion of nitrogen oxides and catalytic oxidation of carbon monoxide with application of said composition.
EFFECT: claimed composition makes it possible to effectively purify exhaust gases from nitrogen oxides and carbon monoxides.
13 cl, 2 dwg, 2 tbl, 4 ex
| Title |
Year |
Author |
Number |
| HIGH-ACIDITY COMPOSITION BASED ON OXIDES OF ZIRCONIUM, SILICON AND AT LEAST ANOTHER ELEMENT SELECTED FROM TITANIUM, ALUMINIUM, TUNGSTEN, MOLYBDENUM, CERIUM, IRON, TIN, ZINC AND MANGANESE |
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|
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