Direct Synthesis of Hierarchical FeCu‐ZSM‐5 Zeolite with Wide Temperature Window in Selective Catalytic Reduction of NO by NH 3

• Published in: ChemCatChem 2019-10, Vol.11 (19), p.4744-4754
• Main Authors: Yue, Yuanyuan, Liu, Ben, Lv, Nangui, Wang, Tinghai, Bi, Xiaotao, Zhu, Haibo, Yuan, Pei, Bai, Zhengshuai, Cui, Qingyan, Bao, Xiaojun
• Format: Article
• Language: English
• ISSN: 1867-3880; 1867-3899
• DOI: 10.1002/cctc.201901104

In this article, we report a one‐pot synthesis strategy to directly synthesize the hierarchical FeCu‐ZSM‐5 zeolite. Its physicochemical properties were studied by various characterization techniques and catalytic performance was tested in selective catalytic reduction (SCR) of NO with NH 3 as reductant. The characterization results show that: compared with three reference zeolites Fe/ZSM‐5, Cu/ZSM‐5, and Fe/Cu/ZSM‐5 prepared through an incipient wetness impregnation method, the synthesized FeCu‐ZSM‐5 zeolite exhibits hierarchical micro‐mesoporous structures, more Fe 3+ in zeolite framework, and larger isolated Cu 2+ species. Therefore, when used as a catalyst in NH 3 ‐SCR, the resulting hierarchical FeCu‐ZSM‐5 catalyst shows better catalytic performance (high NO conversion and N 2 selectivity) in a wide temperature window and higher hydrothermal stability than the three reference catalysts. Our work provides a simple and facile route to prepare the promising NH 3 ‐SCR catalyst for practical applications in controlling NO x emissions.