Synthesis of High-Silica LTA and UFI Zeolites and NH3–SCR Performance of Their Copper-Exchanged Form

A series of LTA zeolites with Si/Al = 8.3-∞ and a UFI zeolite with Si/Al = 11 are synthesized using benzylimidazolium-based cations as organic structure-directing agents in fluoride media, if required, together with the tetramethylammonium ion. Two LTA zeolites with Si/Al = 11 and 16 showed an enhan...

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Veröffentlicht in:ACS catalysis 2016-04, Vol.6 (4), p.2443-2447
Hauptverfasser: Jo, Donghui, Ryu, Taekyung, Park, Gi Tae, Kim, Pyung Soon, Kim, Chang Hwan, Nam, In-Sik, Hong, Suk Bong
Format: Artikel
Sprache:eng
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Zusammenfassung:A series of LTA zeolites with Si/Al = 8.3-∞ and a UFI zeolite with Si/Al = 11 are synthesized using benzylimidazolium-based cations as organic structure-directing agents in fluoride media, if required, together with the tetramethylammonium ion. Two LTA zeolites with Si/Al = 11 and 16 showed an enhanced operating temperature window with excellent thermal durability for selective catalytic reduction of NOx with NH3, compared to Cu-SSZ-13 commercially being used for automotive applications.
ISSN:2155-5435
2155-5435
DOI:10.1021/acscatal.6b00489