| 학회 |
한국화학공학회 |
| 학술대회 |
2022년 봄 (04/20 ~ 04/23, 제주국제컨벤션센터) |
| 권호 |
28권 1호, p.236 |
| 발표분야 |
[주제 3] 미세먼지 |
| 제목 |
Enhanced SO2 resistance of V2O5/WO3-TiO2 catalyst physically mixed with alumina for the selective catalytic reduction of NOx with NH3 |
| 초록 |
Selective catalytic reduction with NH3 (NH3-SCR) is an effective NOx removal technology in the industry. Vanadia supported on tungsten titania (V2O5/WO3-TiO2) is most widely utilized for NH3-SCR because of its high tolerance to sulfur. Although it exhibits stable performance under SO2 in the stream, there are still unsolved sulfur poisoning issues under low-temperature operations due to the accumulation of ammonium bisulfate (ABS). In this study, we introduce a hybrid catalyst comprising V2O5/WO3-TiO2 physically mixed with alumina (VWTi + Al), which exhibited superior stability during SO2 aging compared to conventional vanadia catalysts. The improved sulfur tolerance originates from the direct migration of in-situ formed ABS from the vanadia domain to the alumina domain through physical contact rather than gas-phase SO2 adsorption on alumina. Interestingly, the mixed alumina maintains superior affinity to ABS as well as reusability after repetitive SO2 aging and regeneration. The present study suggests that the hybrid catalyst can be an applicable catalyst to NOx removal process in stationary sources. |
| 저자 |
전세원1, 김도희1, 송인학1, 이황호1, 김준우2, 변영철2, 고동준2
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| 소속 |
1서울대, 2포항산업과학(연) |
| 키워드 |
에너지 환경(Energy and Environment) |
| E-Mail |
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| 원문파일 |
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