SCR of NO_x

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• 作者：Asima Sultana ; Tetsuya Nanba ; Masaaki Haneda ; Hideaki Hamada
• 关键词：NH₃– ; SCR ; Cu/ZSM-5 ; Na⁺ cation ; Cu⁺ ; Decane ; FTIR spectroscopy
• 刊名：Catalysis Communications
• 出版年：2009
• 出版时间：25 August 2009
• 年：2009
• 卷：10
• 期：14
• 页码：1859-1863
• 全文大小：264 K

文摘

The selective catalytic reduction of NO_x with NH₃ in the presence of decane over Cu/ZSM-5 catalysts prepared from H⁺ and Na⁺ZSM-5 precursors were investigated. Cu/NaZSM-5 catalyst showed significantly higher NO_x conversion compared to Cu/HZSM-5. However, the presence of decane decreased the activity of both the catalysts, due to coke formation. Cu/HZSM-5 catalyst showed a larger decline in NO_x conversion with time on stream compared to Cu/NaZSM-5. The higher activity of Cu/NaZSM-5 is attributed, to the promoting effect of Na⁺ cations in the formation of active Cu⁺ and nitrite and nitrate intermediates species and retardation of coke formation.