METHOD FOR REMOVING NITROGEN OXIDES FROM GAS Russian patent published in 2023 - IPC B01D53/86 

FIELD: gas industry.

SUBSTANCE: removal of nitrogen oxides (NO_x) from a gas stream using selective catalytic reduction.

Method for reducing nitrogen oxides (NO_x) in a gas source involves passing the gas over a catalyst suitable for selective catalytic reduction of the NO_x contained in the presence of a reducing reagent. Said catalyst is a FER type zeolite catalyst produced by a process that does not include an iron loading step and does not include any transition metal loading step. Said FER type zeolite does not contain ion-exchanged iron and is not filled with iron or any transition metal. In this case, the term “transition metal” means any element of period 4, period 5, period 6 of the periodic system of elements. FER type zeolite has a Si/Al ratio ranging from 6 to 9. A catalyst intended for use as a NO_x removal catalyst in a selective catalytic NO_x reduction process is also claimed.

EFFECT: group of inventions ensures reduction of NO_x content in gas.

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