US 2026/0295569 A1 · CATALYTIC MATERIALS COMPRISING FE-CONTAINING ZEOLITIC MATERIAL FOR THE TREATMENT OF AN EXHAUST GAS

Abstract

An iron-containing catalytic material for the selective catalytic reduction of NOx in exhaust gas from an internal combustion engine. The catalytic material comprises a zeolitic material comprising SiO2 and X2O3 in its framework structure, wherein X is a trivalent element such as aluminium, wherein the zeolitic material has an FER-type framework structure, wherein the deconvoluted 29Si MAS NMR of the zeolitic material comprises a specific first peak (P1) corresponding to Q4(IAI) sites and having a maximum in the range of from −103.5 to −108.5 ppm with a certain minimum integral relative to three other peaks in the range of −90.0 to −130.0 ppm. The catalytic material also comprises Fe supported on the zeolitic material.

Claims16

Dependent claims

A catalytic material for the selective catalytic reduction of NOx, the catalytic material comprising

a zeolitic material comprising SiO2 and X2O3 in its framework structure,
wherein X is a trivalent element,
wherein the zeolitic material has an FER-type framework structure,
wherein the deconvoluted 29Si MAS NMR of the zeolitic material comprises a first peak (P1) having a maximum in the range of from −103.5 to −108.5 ppm, wherein the integral of the first peak affords an area I1, wherein the integral of all peaks in the range of −90.0 to −130.0 ppm afford an area Itotal, wherein the ratio of the area I1 of the first peak to the area Itotal of all peaks is equal to or greater than 0.20:1,
wherein the catalytic material comprises Fe, wherein Fe is supported on the zeolitic material.

2 more elements

Dependencies are inferred from the claim text.

Catalytic materials comprising fe-containing zeolitic material for the treatment of an exhaust gas

Life of this patent

Catalytic materials comprising fe-containing zeolitic material for the treatment of an exhaust gas

Life of this patent

Abstract

Claims16