SCR catalyst and preparation method thereof

Abstract

The present invention discloses a method for preparing a selective catalytic reduction (SCR) catalyst, the method comprising: a first step of preparing a synthesis mother liquor comprising a silica and alumina supply source comprising zeolite A and silica, a structure inducing material, a complexing material, and a solvent; a second step of reacting the synthesis mother liquor to prepare CHA zeolite; and a third step of performing ion exchange on the prepared CHA zeolite and a transition metal.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2020-0146180 filed with the Korean Intellectual Property Office on November 4, 2020, the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure relates to an SCR catalyst and a preparation method thereof, and more particularly, to an SCR catalyst with improved thermal durability and NOx purification performance and a preparation method thereof. Background technique [0004] Zeolite is a porous material with many pores of unique and regular shape and size. [0005] The acidity of zeolites can be controlled in a wide range by changing the content of aluminum present in the framework, and zeolites have a large specific surface area and can exchange cations, so zeolites are widely used as catalysts or adsorbents in the field of fine chemistry. [0006] Recently, a selective catalytic r...

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Problems solved by technology

However, when the aluminum present in the zeolite framework is exposed to high-temperature water vapor, the aluminum can be leached from the framework, so the structure of the zeolite may collapse, resulting in poor catalytic activity

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