iron-containing zeolite, process for preparing an iron-containing zeolitic material, and use of iron-containing zeolitic material

摘要

Iron-containing zeolite, process for the preparation of an iron-containing zeolitic material, and use of the iron-containing zeolitic material. The present invention relates to a ferrous zeolite, wherein the number of iron centers relative to the zeolite is greater than the number of zeolite cation positions. The present invention further relates to a ferrous zeolite which can be produced by gas phase reaction with pentacarbonyl iron, comprising a specific surface area larger than analogous ferrous zeolites produced by ion exchange and / or more hydrothermally stable. than analogous ferrous zeolites produced by beta structure, which can be produced by stuttering phase reaction with pentacarbonyl iron, where the number of iron clusters greater than 10 nm is less than 15% by weight relative to the total amount of iron. The present invention further relates to a method for producing a ferrous zeolitic material, characterized in that iron doping occurs by reaction of a gas phase using pentacarbonyl iron. The present invention further relates to a method for catalytic reduction of nitrogen oxides by the addition of ammonia and use of catalysts comprising said ferrous zeolitic material.