| 학회 |
한국화학공학회 |
| 학술대회 |
2021년 봄 (04/21 ~ 04/23, 부산 BEXCO) |
| 권호 |
27권 1호, p.1063 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
Direct use of Vanadia-based SCR catalyst by adding low Pt content forreducing NH3 & CO emissions |
| 초록 |
The NH3-SCR system is normally operated with slightly excess injection of NH3 to achieve maximum conversion of NOx, where unreacted NH3 is slipped out from catalytic converters. The emission of CO by partial combustions of fuel is also one of the major concerns in air pollution control. The ammonia slip catalysts (ASC) have been developed to oxidize NH3 to N2. Modern aftertreatments have required the multifunctional catalyst to simultaneously convert NH3 and CO. In this study, we have directly employed the VW/TiO2 catalyst widely used for NH3-SCR by adding Pt to oxidize CO and NH3. Compared to the Pt/TiO2 catalyst, the PtVW/TiO2 catalyst revealed a superior N2-selectivity (>90%) in the high-temperature region (>300 ⁰C). The catalytic performance was apparently affected by the vanadium loading, which means this can be attributable to the internal-SCR mechanism with the reaction of continuously introducing NH3 and nitrate species formed on the surface. The mechanistic study by DRIFT will be also provided to identify surface intermediates. |
| 저자 |
변상우1, Bekelcha T. Gadisa2, 박포원2, 강성봉1
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| 소속 |
1광주과학기술원, 2㈜나노 |
| 키워드 |
촉매 |
| E-Mail |
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| 원문파일 |
초록 보기 |
