CATALYTIC EXHAUST GAS NEUTRALISER Russian patent published in 2015 - IPC B01D53/94 B01J23/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a catalytic exhaust gas neutraliser. The catalytic exhaust gas neutraliser comprises a substrate, a catalytic coating layer of a porous support on the substrate surface and a noble metal catalyst deposited on the porous support of the catalytic coating layer. The catalytic coating layer is formed as a laminated structure having an upper layer and a lower layer. The noble metal catalyst deposited in the upper layer is Rh particles. The noble metal catalyst deposited in the lower layer is Pd particles. The porous support of the lower layer is formed by a composite oxide ACZ consisting of aluminium oxide (Al₂O₃), cerium oxide (CeO₂) and zirconium oxide (ZrO₂). The composite oxide ACZ is obtained using an alcoholate technique. The starting material in said alcoholate technique is a metal alcoholate and a metal salt. The composite oxide ACZ, obtained via an alcoholate method, is a composite oxide in which Al, Ce and Zr become almost homogeneously mixed on the atomic or molecular level of the oxide. The atomic ratio Ce/Zr in the composite oxide ACZ is not more than 0.6.

EFFECT: catalyst longevity, maintaining stable catalytic activity at low temperatures, high oxygen-accumulating capacity.

10 cl, 5 dwg, 3 tbl, 9 ex