For the selective catalytic reduction of NOx with ammonia (NH3-SCR), a V2O5WO3/TiO2 (VW/nTi) catalyst was prepared using V2O5 and WO3 on a nanodispersed TiO2 (nTi) support by simple impregnation process. The nTi support was dispersed for 0~3 hrs under controlled bead-milling in ethanol. The average particle size (D50) of nTi was reduced from 582 nm to 93 nm depending on the milling time. The NOx activity of these catalysts with maximum temperature shift was influenced by the dispersion of the TiO2. For the V0.5W2/nTi-0h catalyst, prepared with 582 nm nTi-0h before milling, the decomposition temperature with over 94 % NOx conversion had a narrow temperature window, within the range of 365-391 °C. Similarly, the V0.5W2/nTi-2h catalyst, prepared with 107 nm nTi-2h bead-milled for 2hrs, showed a broad temperature window in the range of 358~450 °C. However, the V0.5W2/Ti catalyst (D50 = 2.4 μm, aqueous, without milling) was observed at 325-385 °C. Our results could pave the way for the production of effective NOx decomposition catalysts with a higher temperature range. This approach is also better at facilitating the dispersion on the support material. NH3-TPD, H2-TPR, FT-IR, and XPS were used to investigate the role of nTi in the DeNOx catalyst.

Abstract
1. 서 론
2. 실험방법
    2.1. TiO2 담체 및 나노분산 TiO2 제조
    2.2. 나노분산 TiO2 담체상에 제조된 V2O5-WO3/TiO2탈질촉매
    2.3. NH3 SCR 반응 활성 실험
    2.4. 촉매 특성분석
3. 실험결과 및 고찰
    3.1. 촉매 담체로 사용된 나노분산 TiO2 제조 및 물리화학적 특성 연구
    3.2. 나노분산 TiO2 담체로 제조된 V2O5-WO3/TiO2촉매의 특성분석
    3.3. 나노분산 TiO2 담체로 제조된 V2O5-WO3/TiO2촉매의 탈질 효율 및 특성평가
4. 결 론
Acknowledgement
References

• 서민채(한국세라믹기술원 탄소중립소재센터, 경상국립대학교 재료공학과) | Min Chae Seo (Carbon Neutral Materials Center, Korea Institute of Ceramic Engineering & Technology, Department of Materials Engineering, Gyeongsang National University)
• 반세민(한국세라믹기술원 탄소중립소재센터, 경상국립대학교 재료공학과) | Se-Min Ban (Carbon Neutral Materials Center, Korea Institute of Ceramic Engineering & Technology, Department of Materials Engineering, Gyeongsang National University)
• 허재구(한국세라믹기술원 탄소중립소재센터) | Jae Gu Heo (Carbon Neutral Materials Center, Korea Institute of Ceramic Engineering & Technology)
• 추용식(한국세라믹기술원 탄소중립소재센터) | Yong Sik Chu (Carbon Neutral Materials Center, Korea Institute of Ceramic Engineering & Technology)
• 문경석(경상국립대학교 재료공학과) | Kyung-Seok Moon (Department of Materials Engineering, Gyeongsang National University)
• 김대성(한국세라믹기술원 탄소중립소재센터) | Dae-Sung Kim (Carbon Neutral Materials Center, Korea Institute of Ceramic Engineering & Technology) Corresponding author