催化作用
氮氧化物
甲醇
选择性催化还原
烯烃纤维
沸石
氨
化学
丙烯
硅酸铝
硼酸
无机化学
还原剂
选择性还原
有机化学
燃烧
作者
Jingyan Zhang,Peng Ji,Linzhu Ren,Yonggang Zhao,Shiqing Li,Hao Xu,Honggen Peng,Jingang Jiang,Yejun Guan,Peng Wu
标识
DOI:10.1016/j.cej.2022.136657
摘要
The small-pore CHA-type zeolites have received intensive attentions due to their outstanding performance in both of the methanol-to-olefin (MTO) process and ammonia selective catalytic reduction of nitrogen oxides (NH3-SCR of NOx) reactions. However, the costly synthesis of CHA-type aluminosilicate is a great issue for the practical application. In this study, a novel and cheap organic structure-directing agent of N,N,N-trimethylisobutylammonium hydroxide was developed and used to synthesize CHA-type zeolites (name as ECNU-25) with boric acid as the supporting agent. The Si/Al ratio in the synthetic gel could be tailored in a wide range of 50 - ∞. [Al,B]-ECNU-25 zeolite thus synthesized served as an effective catalyst for the MTO reaction. After Cu2+-exchange, the Cu-[Al,B]-ECNU-25 was also highly active in the NH3-SCR of NOx.
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