COMPOSITION, BASED ON OXIDES OF ZIRCONIUM, CERIUM AND OTHER RARE EARTH METAL WITH LOWER REDUCTABILITY TEMPERATURE, METHOD OF OBTAINING AND APPLICATION IN FIELD OF CATALYSIS

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to composition, based on oxides of zirconium, cerium and at least one rare earth metal element, different from cerium, to method of its obtaining and to its application for purification of exhaust gases of internal combustion engines. Composition, based on oxides of zirconium, cerium and at least one rare earth metal element, different from cerium, contains cerium oxide not more than 50 wt % and has after burning at 1000°C for 6 hours maximal temperature of reductability not more than 500°C and specific surface at least 45 m²/g. method of obtaining composition includes carrying out continuous reaction in mixture of compounds of zirconium, cerium and other rare earth metal element, different from cerium with basic compound with time of being in reactor not longer than 100 milliseconds, obtained sediment is heated, and then combined with surface-active substance before burning Catalytic system, containing claimed composition, and method of purification of exhaust gases of internal combustion engines with application of described above composition or catalytic system as catalyst, are described.;EFFECT: invention ensures obtaining composition, combining high specific surface and maximal reductability at lower temperature.;16 cl, 5 ex, 2 tbl, 2 dwg