A SCR catalyst with excellent activity in low temperature and A Method thereof

The present invention relates to a method for preparing a selective reduction catalyst having an increased nitrogen oxide removal rate in the range of 200 to 250℃, and to a selective reduction catalyst prepared by the preparation method, wherein the preparation method comprises the following steps o...

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Bibliographische Detailangaben
Hauptverfasser:	SHIN BYEONG SEON, JEONG KWAN HYOUNG, KIM JONG KOOK, OH HYUNG SUK, NAM SEUNG HA, SEO PHIL WON, LEE KANG HONG
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The present invention relates to a method for preparing a selective reduction catalyst having an increased nitrogen oxide removal rate in the range of 200 to 250℃, and to a selective reduction catalyst prepared by the preparation method, wherein the preparation method comprises the following steps of: injecting and mixing a binder in an aqueous solution; adjusting pH to 4-7 after stirring; adding cellulose and a wetting agent to be mixed; adding transition metal-zeolite to be mixed to prepare a slurry solution; and coating a cordierite carrier with the prepared solution. A selective catalytic reduction (SCR) catalyst of the present invention exhibited excellent NO_X removal rate at a low temperature. 본 발명은 수용액 상에서 바인더를 주입하여 혼합하고, 교반 후 pH를 4~7로 조절한 다음, 셀루로스 및 습윤제를 추가한 후 혼합한 후 전이금속-제올라이트(Zeolite)를 투입하고 혼합하여 슬러리(Slurry) 용액을 제조하여 상기 제조된 용액을 코디어라이트(Cordierite) 담체에 코팅하는 단계를 포함하는 200~250℃의 범위에서 질소산화물 제거율이 증가된 선택적 환원촉매 제조방법과 그 제조방법에 의하여 제조된 선택적 환원촉매에 대한 것으로, 본 발명의 SCR 촉매는 저온에서 우수한 NOX의 제거율을 나타내었다.