Resistance to sulfidation of the catalytic reduction of NO_x over Ag/Al₂O₃ by controlling the loadings of Ag and Ag⁺

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• 作者：Rui Ke ; Qiang Chen ; Junhua Li ; Yongqing Zhu ; Jiming Hao
• 关键词：Non-thermal plasma ; Selective catalytic reduction ; Lean burn ; NO_x ; Ag/γ ; -Al₂O₃ ; Propene
• 刊名：Catalysis Communications
• 出版年：2007
• 期刊代码：12_15667367
• 类别：ce
• 出版时间：March 2007
• 卷：8
• 期：3
• 页码：589-592
• 文件大小：280 K

摘要

SO₂ strongly decreased the catalytic activities of low loading Ag/Al₂O₃ below 500 °C in selective catalytic reduction (SCR) of NO_x by propene with or without the assistance of non-thermal plasma (NTP), which was mainly attributed to the competition between SO₂ and NO. By controlling the loadings of Ag and Ag⁺ over alumina, the resistance of SO₂ was remarkably enhanced between 400 °C and 500 °C in thermal SCR. In the NTP-assisted SCR, most of the NO_x conversions were also apparently recovered from 250 °C to 500 °C.