FIELD: car industry.
SUBSTANCE: three-way catalyst (TWC) in an exhaust system is proposed for internal combustion engines for purifying exhaust gas. The catalyst contains: substrate and a catalytic area on substrate; wherein the catalytic area contains the first component of platinum group metal (PGM), an oxygen-storage capacity (hereinafter – OSC) material, rear earth metal oxide and inorganic oxide. In this case, OSC is selected from a group consisting of cerium oxide, mixed cerium-zirconium oxide and mixed aluminum-cerium-zirconium oxide. Inorganic oxide is alumina, lanthanide-stabilized alumina or composite magnesium/aluminum oxide. Rear earth metal oxide is Pr6O11, Nd2O3, Y2O3 or a mixture thereof, and it is present in the amount of 2-20% per the weight of OSC material. In this case, an average diameter (d50) of particles of rear earth metal oxide is more than 4 mcm.
EFFECT: catalyst has improved thermal stability.
12 cl, 4 tbl, 16 ex
| Title | Year | Author | Number |
|---|---|---|---|
| CATALYST FOR EXHAUST GAS PURIFICATION | 2018 |
|
RU2790008C2 |
| LAMINAR AUTOMOTIVE CATALYST COMPOSITES | 2016 |
|
RU2713550C2 |
| PLATINUM GROUP METAL CATALYSTS APPLIED TO ALUMINIUM OXIDE CARRIER WITH LARGE PORES | 2017 |
|
RU2745067C2 |
| NEW TWC MULTILAYER CATALYST FOR CLEANING THE EXHAUST GAS FROM A GASOLINE ENGINE | 2018 |
|
RU2776996C2 |
| SINGLE-LAYER CATALYST WITH LOW LOAD OF POROUS OXIDE COATING FOR PURIFICATION OF EXHAUST GAS OF PETROL ENGINE | 2018 |
|
RU2778836C2 |
| CATALYST CONTAINING BIMETALLIC NANOPARTICLES OF PLATINUM GROUP METALS | 2017 |
|
RU2753835C2 |
| NEW CATALYTIC TWC NEUTRALIZERS BASED ON PGM NANOPARTICLES FOR USE WITH SPENT PETROL GAS | 2019 |
|
RU2782922C2 |
| IMPROVED TWC CATALYSTS CONTAINING HIGHLY EFFICIENT SUBSTRATE WITH DOPING ADDITIVE | 2019 |
|
RU2789587C2 |
| NEW TWO-LAYER TWC CATALYST WITH THREE ZONES IN PETROL DEVICES GENERATING EXHAUST GAS | 2018 |
|
RU2780479C2 |
| ZONED CATALYST COMPOSITES | 2015 |
|
RU2686960C2 |
