OXYGEN-ACCUMULATING AND PRODUCING MATERIAL, CATALYST, EXHAUST GAS PURIFICATION SYSTEM AND METHOD FOR PURIFYING SAME Russian patent published in 2021 - IPC C01G25/02 B01D53/94 B01J21/06 B01J23/10 F01N3/10 

FIELD: chemical engineering.

SUBSTANCE: invention relates to oxygen-accumulating producing material containing a complex oxide based on cerium dioxide – zirconium dioxide. The oxygen-accumulating producing material represents a complex oxide based on cerium dioxide – zirconium dioxide, contains 0.1-20 mol. % Gd2O3 and has ion conductivity of 2x10^-5 S/cm or more at 400°C. The molar ratio of cerium and zirconium equals to 0.3-0.5 per cerium/(cerium+zirconium). The complex oxide based on cerium dioxide – zirconium dioxide comprises at least one of Ca, Y, Pr. The oxygen accumulations and discharge value contains 420 mmol - О₂/g.

EFFECT: ensured is improved efficiency of purification from HC, CO and NOx.

14 cl, 7 dwg, 2 tbl, 10 ex