期刊
CATALYSIS SCIENCE & TECHNOLOGY
卷 4, 期 11, 页码 3917-3926出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cy00384e
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资金
- Swedish Energy Agency
- AB Volvo
- ECAPS AB
- Haldor Topsoe A/S
- Scania CV AB
- Volvo Car Corporation AB
Hydrothermal synthesis of Na-SSZ-13 using a low concentration of the structure-directing agent N,N,N-trimethyl-1-adamantanimonium hydroxide and functionalization of the SSZ-13 framework through the introduction of Cu and Fe via ion exchange have been carried out. The prepared samples were characterized by XRD, SEM, and UV-vis spectroscopy, N-2 sorption, XRF and NH3-TPD. It was found that relatively large iron oxide particles and well-dispersed Cu2+ species are formed as a result of ion exchange with iron and copper, respectively. Furthermore, the catalytic activity for NH3 oxidation, NO oxidation and selective catalytic reduction of NOx with ammonia (NH3-SCR) was investigated both in the absence and in the presence of water. The functionalization of the SSZ-13 structure enhances the catalytic activity for NH3-SCR significantly. While the NH3-SCR activity is negligible for the Na-SSZ-13 sample, the Cu-SSZ-13 sample is highly active especially at low temperatures, and the Fe-SSZ-13 sample shows the highest activity at elevated temperatures.
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