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2022 Vol.32, Issue 11 Preview Page
V2O5WO3/TiO2 Catalyst Prepared on Nanodispersed TiO2 for NH3-SCR: Relationship b etween D ispersed P article S ize of T iO2 and Maximum Decomposition Temperature of NOx

NH3-SCR용 나노분산 TiO2 담체상에 제조된 V2O5WO3/TiO2 촉매: TiO2 분산입도와 NOx 최대 분해온도와의 상관성

Min Chae Seo12
,
Se-Min Ban12
,
Jae Gu Heo1
,
Yong Sik Chu1
,
Kyung-Seok Moon2
,
Dae-Sung Kim1†
서 민채12
,
반 세민12
,
허 재구1
,
추 용식1
,
문 경석2
,
김 대성1†
1Carbon Neutral Materials Center, Korea Institute of Ceramic Engineering & Technology, Jinju 52851, Republic of Korea
2Department of Materials Engineering, Gyeongsang National University, Jinju 52828, Republic of Korea
1한국세라믹기술원 탄소중립소재센터
2경상국립대학교 재료공학과
†Corresponding author E-Mail : dskim@kicet.re.kr (D.-S. Kim, KICET)
November 2022. pp. 496-507
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Abstract

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.

Keywords
bead-milling
high-temperature shift
in situ FT-IR
nano dispersed TiO2
NH3-SCR DeNOx
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 32
  • No :11
  • Pages :496-507
  • Received Date : 2022-10-04
  • Revised Date : 2022-11-11
  • Accepted Date : 2022-11-14
  • DOI :https://doi.org/10.3740/MRSK.2022.32.11.496
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