METHOD FOR PREPARING BEAD TYPE CATALYST COMPRISING CATALYTICALLY ACTIVE METAL SUPPORTED BY METAL OXIDE

The present invention relates to a method for preparing a catalytically active metal-supported metal oxide bead catalyst, including the steps of: (a) preparing a catalytically active metal-supported metal oxide; (b) adding a solution containing the catalytically active metal-supported metal oxide an...

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Bibliographische Detailangaben
Hauptverfasser: KIMYEON, LEE GYOUNG WOO, JOO JI BONG, LEE HYEON KYEONG, KIM JI YUL, JANG SE JIN
Format: Patent
Sprache:eng ; kor
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Zusammenfassung:The present invention relates to a method for preparing a catalytically active metal-supported metal oxide bead catalyst, including the steps of: (a) preparing a catalytically active metal-supported metal oxide; (b) adding a solution containing the catalytically active metal-supported metal oxide and an alginate-based polymer to a calcium ion (Ca^2+) solution to form spherical beads; (c) surface-treating the catalyst beads by using an acid; and (d) drying and heat treating the catalyst beads. The present invention also relates to a catalytically active metal-supported metal oxide bead catalyst prepared by the method. According to the present invention, it is possible to prepare spherical oxide bead particles including at least one metal oxide support supported with catalytically active metal nanoparticles, such as gold (Au), in a simple manner. The oxide bead catalyst supported with the catalytically active metal, such as gold (Au), prepared according to the present invention can be used as a catalyst for oxidation of harmful organic compounds in exhaust gas to remove harmful exhaust gas compounds, such as carbon monoxide, effectively. 본 발명은, (a) 촉매 활성 금속이 담지된 금속 산화물을 제조하는 단계; (b) 상기 촉매 활성 금속이 담지된 금속 산화물 및 알지네이트계 고분자를 포함한 용액을 칼슘 이온(Ca2+) 용액에 첨가해 구형의 촉매 비드(bead)를 제조하는 단계; (c) 산을 이용해 상기 촉매 비드를 표면 처리하는 단계; 및 (d) 상기 촉매 비드를 건조 및 열처리하는 단계;를 포함하는 촉매 활성 금속 담지 산화물 비드 촉매의 제조방법 및 이에 의해 제조된 촉매 활성 금속 담지 산화물 비드 촉매에 대한 것으로서, 본 발명에 의하면 금(Au) 등 촉매 활성 금속 나노입자가 1종 이상의 금속 산화물 담지체에 담지된 구형 산화물 비드 입자를 간편하게 제조할 수 있으며, 또한 균일한 크기의 비드촉매를 제조할 수 있으며, 본 발명에 의해 제조된 금(Au) 등의 촉매 활성 금속이 담지된 산화물 비드 촉매는 유해배기 유기화합물 산화촉매 사용되어, 일산화탄소와 같은 유해배기가스 화합물들을 효과적으로 제거할 수 있다.