NANOMETRIC CERIUM OXIDE-BASED COMPOSITION ON HIGH REDUCING POWER SUPPORT, PREPARATION METHOD THEREOF AND USE AS CATALYST Russian patent published in 2011 - IPC B01J23/10 B01J23/02 B01J21/00 B01J23/42 B01J37/02 B01J37/03 B82B1/00 B01D53/56 B01D53/94 

FIELD: chemistry.

SUBSTANCE: invention relates to a catalyst composition or support for a catalyst for treating exhaust gases of an internal combustion engine based on nanometric cerium oxide on a support, a method of preparing said composition and use thereof as a catalyst or support. Described is a composition which contains a cerium-based oxide deposited on a support based on silicon dioxide, aluminium oxide, titanium oxide or zirconium dioxide. The composition contains particles of the said oxide deposited on the said support in form of separate particles or in form of aggregates, having dimensions greater than 500 nm, and after 6 hours of calcination at temperature lower than 800°C, the composition has reducing power, measured at temperature 30°C-900°C, equal to at least 80%. The invention describes a method of preparing the composition, where a colloidal dispersion of the deposited oxide is brought into contact with the support, spray drying the obtained suspension and calcination of the obtained dry product. Described is a catalyst system for treating exhaust gases of internal combustion engines containing the composition described above, and a method of treating exhaust gases using said system.

EFFECT: obtaining a composition with high reducing power at low temperatures ranging from 200°C to 400°C.

23 cl, 4 tbl, 11 ex