| 학회 |
한국공업화학회 |
| 학술대회 |
2021년 가을 (11/03 ~ 11/05, 대구 엑스코(EXCO)) |
| 권호 |
25권 2호 |
| 발표분야 |
포스터-촉매 |
| 제목 |
Thermal stability of CeVO4-based catalysts depending on support composition for the selective catalytic reduction of NOX by ammonia |
| 초록 |
Nitrogen oxides (NOX) emitted in the exhaust gas pose a serious threat to the environment. This creates fine particle through photochemical reaction. As a technology to reduce NOX from exhaust gas, the most chemically and economically efficient technology is selective catalytic reduction (SCR) by ammonia or urea. The CeVO4 with SiO2 and WO3 added to TiO2 (i.e. CeVO4/TWS) is the optimal catalyst to promote N2 selectivity through improved thermal stability and NH3 oxidation. In this study, we investigated the reaction mechanism of CeVO4 modified catalysts. Notably, CeVO4 with SiO2 and WO3 catalyst shows an Eley-Rideal and Langmuir-Hinshelwood models as dual model (ER-LH) based on abundant Lewis and Brønsted acid sites below 300 °C. On the other hand, the hydrothermal aged catalyst dominates the Eley-Rideal mechanism (reaction of activated ammonia with gaseous NO) based on Lewis acid sites. |
| 저자 |
박연재, 김동호, Ha Heon Phil, 권동욱
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| 소속 |
한국과학기술(연) |
| 키워드 |
hydrothermal aging; NOX reduction; TWS; CeVO4; mechanism
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| E-Mail |
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