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학술저널
저자정보
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한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제23권 제3호
발행연도
2007.6
수록면
277 - 285 (9page)

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Porous cordierite beads, of which the average pore size was 130 ㎛ and porosity was about 80%, were prepared by the foaming method and then their application as support of the Pt/γ-alumina catalyst for NO<SUB>x</SUB> reduction with propene was investigated. The pressure drop of a 2 ㎜ porous beads filter was less than that of a 1 ㎜ porous beads filter and the difference in pressure drop between these two increased as the flow rate increased. The catalytic activity of Pt/γ-alumina washcoated on the porous bead was tested with varying Pt loading (0.005~0.1 g/㎤), C₃H?/NO mole ratio (0.5~8), space velocity (20,000~30,000 h?¹) and oxygen contents (1 and 8). Pt loading of 0.04 g/㎤ showed the highest activity for NO<SUB>x</SUB> conversion. The De-NO<SUB>x</SUB> test was operated in the temperature range of 200~400℃ and the best operation temperature of the catalytic filter is about 250℃. As the C/N ratio increased, increase of the NO<SUB>x</SUB> conversion might result from the increase in exhaustion of the amount of oxygen by the reduction of hydrocarbon. NO<SUB>x</SUB> conversion at 20,000 h?¹ of space velocity shows a maximum 34% higher conversion than that at 30,000 h?¹. On condition that O₂ was 5%, space velocity was 20,000 h?¹ and the C/N ratio was 8, the NO<SUB>x</SUB> conversion exhibited a maximum of 40% at 250℃.

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Abstract
1. 서론
2. 실험방법
3. NOx 제거 특성 실험
4. 결과 및 고찰
5. 결론
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UCI(KEPA) : I410-ECN-0101-2009-539-016795701