期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 54, 期 19, 页码 5683-5687出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201501160
关键词
crystal growth; NOx removal; heterogeneous catalysis; seeded growth; zeolites
资金
- Mitsubishi Chemical Corporation
- Ministry of Education, Culture, Sports, Science and Technology (Japan)
- [26249118]
Characteristics of zeolite formation, such as being kinetically slow and thermodynamically metastable, are the main bottlenecks that obstruct a fast zeolite synthesis. We present an ultrafast route, the first of its kind, to synthesize high-silica zeolite SSZ-13 in 10 min, instead of the several days usually required. Fast heating in a tubular reactor helps avoid thermal lag, and the synergistic effect of addition of a SSZ-13 seed, choice of the proper aluminum source, and employment of high temperature prompted the crystallization. Thanks to the ultra-short period of synthesis, we established a continuous-flow preparation of SSZ-13. The fast-synthesized SSZ-13, after copper-ion exchange, exhibits outstanding performance in the ammonia selective catalytic reduction (NH3-SCR) of nitrogen oxides (NOx), showing it to be a superior catalyst for NOx removal. Our results indicate that the formation of high-silica zeolites can be extremely fast if bottlenecks are effectively widened.
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