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

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• 作者：Donghui Jo ; Taekyung Ryu ; Gi Tae Park ; Pyung Soon Kim ; Chang Hwan Kim ; In-Sik Nam ; Suk Bong Hong
• 刊名：ACS Catalysis
• 出版年：2016
• 出版时间：April 1, 2016
• 年：2016
• 卷：6
• 期：4
• 页码：2443-2447
• 全文大小：313K
• ISSN：2155-5435

文摘

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.