| SO2对Ag/Al2O3催化剂上CH3OH还原NO性能的影响 |
| 摘要点击 2242 全文点击 1778 投稿时间：2001-08-27 修订日期：2001-12-17 |
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| 中文关键词 O 催化还原 Ag/Al2O3 甲醇 SO2 |
| 英文关键词 nitric oxide catalytic reduction silver/alumina methanol SO2 |
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| 中文摘要 |
| 用溶胶-凝胶混合法制备了Ag负载量为5%的Ag/A12O3催化剂.研究了富氧条件下,SO2对CH3OH在催化剂上还原NO性能的影响.结果表明,反应气不含SO2和H2O时,NO还原活性温度较低,有显著量N2O生成,这被归因为反应过程中,部分氧化态Ag被还原为金属Ag.添加SO2或同时添加SO2和H2 |
| 英文摘要 |
| Ag/Al2O3 catalyst with 5% Ag loading was prepared by the single step sol gel mixture method and the effects of adding SO2 to reaction feed on NO reduction by CH3OH over the catalyst was investigated in the presence of oxygen. The results showed that in the absence of SO2 and H2O the catalyst displayed lower activity temperature and higher N2O selectivity, which was attributed to the partial reduction of oxidized Ag into metallic Ag under reaction conditions. Selective catalytic reduction activity was not decreased but significantly increased,N2O formation was suppressed and most effective NO reduction temperature shifted to higher temperature by pre sulfated Ag/Al2O3 or addition of SO2 to reaction mixture. XPS analysis showed that the sulfate like species were formed by the effect of SO2. |
