Effect of acid treatment of Fe-BEA zeolite on catalytic N₂O conversion

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• 作者：Jeong Min Jeong ; Ji Hye Park ; Jeong Hun Baek…
• 关键词：N2O Reduction ; Fe ; BEA ; NH3 ; SCR ; Acid Treatment ; Dealumination
• 刊名：Korean Journal of Chemical Engineering
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：34
• 期：1
• 页码：81-86
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Industrial Chemistry/Chemical Engineering; Catalysis; Materials Science, general; Biotechnology;
• 出版者：Springer US
• ISSN：1975-7220
• 卷排序：34

文摘

The effect of acid treatment on the physical and chemical characteristics of BEA zeolite, as well as the catalytic activity of the Fe-BEA catalyst for N₂O reduction under NH₃-selective catalytic reduction (NH₃-SCR) conditions, was examined. The acid treatment caused dealumination of BEA and enrichment of the silanol groups on vacant T-sites and the Brønsted acid sites. As the acid treatment time increased, the silanol groups and the weak acid sites in BEA also increased. Because the weak acid sites behave as anchoring sites for Fe ions, the catalytic activity also increased as the treatment time increased. However, extended exposure of BEA to acid decreased the catalytic activity of the Fe-BEA catalyst somewhat, and decreased the silanol groups and weak acid sites. The catalytic activity and the amount of weak acid sites were well correlated with the BEA acid treatment time.