본 연구는 사용이 불가능한 honeycombSCR 폐촉매를 대상으로 plate 형태로 재제조하여 SCR 촉매로서의 이용 가능성을 확인하고자 수행하였다. Honeycomb SCR 폐촉매 표면에 침척 되어 활성을 저하시키는 ash 등 불순물을 제거하기 위해 증류수 세척과 고온배소를 거친 후 분쇄하여 powder 형태로 만들어 슬러리를 제조하였다. 제조한 슬러리를 plate 형태의 지지체에 압착 및 활성성분을 추가 함침하여 plate SCR 촉매를 제조하였다. 단계별 제조된 촉매을 대상으로 ...
본 연구는 사용이 불가능한 honeycombSCR 폐촉매를 대상으로 plate 형태로 재제조하여 SCR 촉매로서의 이용 가능성을 확인하고자 수행하였다. Honeycomb SCR 폐촉매 표면에 침척 되어 활성을 저하시키는 ash 등 불순물을 제거하기 위해 증류수 세척과 고온배소를 거친 후 분쇄하여 powder 형태로 만들어 슬러리를 제조하였다. 제조한 슬러리를 plate 형태의 지지체에 압착 및 활성성분을 추가 함침하여 plate SCR 촉매를 제조하였다. 단계별 제조된 촉매을 대상으로 XRF(X-ray fluorescence), BET(Surface area analysis)를 이용하여 성분분석 및 비표면적 변화를 확인하였으며, 연속흐름식 상압반응기 상에서 NOx 저감 효율을 측정하였다. 3종류의 honeycomb SCR 폐촉매를 Plate 형태로 재제조한 PCBI-A, PCBI-B, PCBI-C 촉매의 NOx 저감 효율 측정 결과, 모두 plate SCR 신촉매 대비 조금 낮은 NOx 저감 효율로 측정되었다. 이 중 가장 높은 NOx 저감 효율을 나타낸 PCBI-C 촉매를 대상으로 활성 성분인 V2O5 및 WO3를 농도를 달리하여 함침용액을 제조하였고, 각각 함침하여 촉매를 제조한 결과, V2O5 및 WO3 첨가량에 따라 NOx 저감 효율이 상이 하였는데 V2O5 2wt%, WO3 3wt%를 첨가한 촉매가 신촉매 보다 높은 NOx 저감 효율을 보였다. 연구 결과를 통하여 honeycomb SCR 폐촉매를 이용하여 plate SCR 촉매로 재제조가 가능함을 확인할 수 있었다.
본 연구는 사용이 불가능한 honeycomb SCR 폐촉매를 대상으로 plate 형태로 재제조하여 SCR 촉매로서의 이용 가능성을 확인하고자 수행하였다. Honeycomb SCR 폐촉매 표면에 침척 되어 활성을 저하시키는 ash 등 불순물을 제거하기 위해 증류수 세척과 고온배소를 거친 후 분쇄하여 powder 형태로 만들어 슬러리를 제조하였다. 제조한 슬러리를 plate 형태의 지지체에 압착 및 활성성분을 추가 함침하여 plate SCR 촉매를 제조하였다. 단계별 제조된 촉매을 대상으로 XRF(X-ray fluorescence), BET(Surface area analysis)를 이용하여 성분분석 및 비표면적 변화를 확인하였으며, 연속흐름식 상압반응기 상에서 NOx 저감 효율을 측정하였다. 3종류의 honeycomb SCR 폐촉매를 Plate 형태로 재제조한 PCBI-A, PCBI-B, PCBI-C 촉매의 NOx 저감 효율 측정 결과, 모두 plate SCR 신촉매 대비 조금 낮은 NOx 저감 효율로 측정되었다. 이 중 가장 높은 NOx 저감 효율을 나타낸 PCBI-C 촉매를 대상으로 활성 성분인 V2O5 및 WO3를 농도를 달리하여 함침용액을 제조하였고, 각각 함침하여 촉매를 제조한 결과, V2O5 및 WO3 첨가량에 따라 NOx 저감 효율이 상이 하였는데 V2O5 2wt%, WO3 3wt%를 첨가한 촉매가 신촉매 보다 높은 NOx 저감 효율을 보였다. 연구 결과를 통하여 honeycomb SCR 폐촉매를 이용하여 plate SCR 촉매로 재제조가 가능함을 확인할 수 있었다.
In this paper, the possibility of using spent Honeycomb SCR(Selective Catalytic Reduction) catalyst which was treated in three steps as plate SCR catalyst was studied. First, spent Honeycomb SCR catalyst was pretreated by washing with distilled water, high temperature roasting(470°C) and grinding in...
In this paper, the possibility of using spent Honeycomb SCR(Selective Catalytic Reduction) catalyst which was treated in three steps as plate SCR catalyst was studied. First, spent Honeycomb SCR catalyst was pretreated by washing with distilled water, high temperature roasting(470°C) and grinding into powder. And then, three kinds of PCBI(Plate Catalyst Before Impregnation) were prepared by means of pressing slurry which was made of powder from above-mentioned on plate type support. Finally, PCAI(Plate Catalyst After Impregnation) was remanufactured by further impregnation of the active component over PCBI with 1%, 2%, and 2.5% of vanadium solution. The de-NOx reduction efficiency over all prepared catalyst was carried out at 300°C to 400°C on the atmospheric SCR catalyst performance test unit and their characteristics were analyzed by surface area analysis(BET) and X-ray fluorescence(XRF). In the result of BET analysis, specific surface area of treated catalysts has shown that it was recovered to the approximate of that of CFC(Commercial Fresh Catalyst)and decreased with increase of V impregnation amount. From the overall results, it was showed that the de-NOx reduction efficiency of PCBI was lower but that of PCAI was higher than that of CFC. Especially, PCAI-C (V 2%) has shown the highest de-NOx reduction efficiency at 350°C. of all prepared catalysts. Therefore it was considered that using spent honeycomb SCR catalyst through adequate treatment process as plate SCR catalyst is feasible and further research will be needed in detail for the commercialization.
In this paper, the possibility of using spent Honeycomb SCR(Selective Catalytic Reduction) catalyst which was treated in three steps as plate SCR catalyst was studied. First, spent Honeycomb SCR catalyst was pretreated by washing with distilled water, high temperature roasting(470°C) and grinding into powder. And then, three kinds of PCBI(Plate Catalyst Before Impregnation) were prepared by means of pressing slurry which was made of powder from above-mentioned on plate type support. Finally, PCAI(Plate Catalyst After Impregnation) was remanufactured by further impregnation of the active component over PCBI with 1%, 2%, and 2.5% of vanadium solution. The de-NOx reduction efficiency over all prepared catalyst was carried out at 300°C to 400°C on the atmospheric SCR catalyst performance test unit and their characteristics were analyzed by surface area analysis(BET) and X-ray fluorescence(XRF). In the result of BET analysis, specific surface area of treated catalysts has shown that it was recovered to the approximate of that of CFC(Commercial Fresh Catalyst)and decreased with increase of V impregnation amount. From the overall results, it was showed that the de-NOx reduction efficiency of PCBI was lower but that of PCAI was higher than that of CFC. Especially, PCAI-C (V 2%) has shown the highest de-NOx reduction efficiency at 350°C. of all prepared catalysts. Therefore it was considered that using spent honeycomb SCR catalyst through adequate treatment process as plate SCR catalyst is feasible and further research will be needed in detail for the commercialization.
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