Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 261, Issue -, Pages 126-136Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2017.11.012
Keywords
Microwave crystallinity; Dynamic crystallinity; Static crystallinity; SSZ-13 zeolite; Selective catalytic reduction with ammonia
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Funding
- National Natural Science Foundation of China [20906067]
- Shanxi Province Foundation for Returness [2016-038]
- 131 leading talent project of Shanxi province colleges and universities
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The effects of the Si/Al ratio in raw material and the crystallization process on the crystallinity and morphology of SSZ-13 zeolites synthesized by microwave, dynamic, and static hydrothermal methods were studied. After the ion exchange, the Cu-SSZ-13 catalysts were applied to the selective catalytic reduction (SCR) of NOx with NH3 and characterized by XRD, SEM, BET, H-2-TPR, and NH3/NO-TPD. Microwave and dynamic hydrothermal methods can shorten the crystallization time, and the samples synthesized by these two methods showed excellent particle dispersion and a regular morphology. Furthermore, the samples prepared by microwave and dynamic hydrothermal methods have better ion exchange capacity and adsorption of NH3/NO, and the resulting Cu-SSZ-13 catalysts displayed excellent catalytic activity and hydrothermal stability.
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