| 학회 | 한국화학공학회 |
| 학술대회 | 2018년 봄 (04/25 ~ 04/27, 창원컨벤션센터) |
| 권호 | 24권 1호, p.806 |
| 발표분야 | 촉매 및 반응공학 |
| 제목 | Economical synthesis of high-silica LTA zeolites: toward a new commercial catalyst for NH 3 -SCR reaction |
| 초록 | We have recently synthesized LTA zeolites with Si/Al = 8.3-∞ using benzylimidazolium-based cations as an organic structure-directing agent in fluoride media. We found that the Cu-LTA catalysts exhibited remarkable deNOx activities even after hydrothermal aging at 900 °C, opening up a new direction for the development of advanced NH 3 -SCR catalysts. Unfortunately, however, the use of expensive or toxic ingredients, i.e, tetraethylorthosilicate and HF as Si and F sources, respectively, are required for their synthesis, restricting the industrial applications. Here, we show that high-silica LTA zeolites can be synthesized in a cost-effective and environmentally benign way. The crystallization of LTA zeolites strongly depends on the particle size of silica source in the synthesis mixture, whereas the type of Al and F sources does not significantly affect the phase selectivity. As a catalyst for NH 3 -SCR, the Cu-LTA obtained in this work is comparable with that prepared by the conventional route and, of course, is superior to the currently commercialized Cu-SSZ-13. |
| 저자 | 박기태 , 조동희 , 류태경 , 강연주 , 홍석봉 |
| 소속 | POSTECH |
| 키워드 | 촉매 및 반응공학 |
| VOD | VOD 보기 |
| 원문파일 | 초록 보기 |
