| 汪鹏,赵慧敏,陈硕,全燮.金属有机骨架MIL-100(Fe)担载CeO 2复合脱硝催化剂抗硫性能研究[J].,2016,56(4):348-354 |
| 金属有机骨架MIL-100(Fe)担载CeO 2复合脱硝催化剂抗硫性能研究 |
| Research on performance of resistance to SO 2 of deNO x catalyst metal-organic framework MIL-100(Fe) loading CeO 2 |
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| DOI：10.7511/dllgxb201604004 |
| 中文关键词:选择催化还原抗硫金属有机骨架CeO 2/MIL-100(Fe) |
| 英文关键词:selective catalytic reduction (SCR)resistance to SO 2metal-organic frameworks (MOFs)CeO 2/MIL-100(Fe) |
| 基金项目:国家自然科学基金资助项目(21590813). |
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| 摘要点击次数:1371 |
| 全文下载次数:1081 |
| 中文摘要: |
| 在选择催化还原(selective catalytic reduction，SCR)反应中，SO 2对脱硝催化剂活性具有重要影响．通过浸渍法制备的金属有机骨架(metal-organic frameworks，MOFs) MIL-100(Fe)(materials of Institute Lavoisier，MIL)担载CeO 2的CeO 2/MIL-100(Fe)催化剂在250 ℃含有500×10 -6 SO 2的条件下，对NO x 转化率在10 h内可以稳定在91%以上，高于MIL-100(Fe)催化剂的83%．原位红外漫反射傅里叶变换谱实验结果表明，SO 2会导致MIL-100(Fe)催化剂表面B酸性位上NH + 4物种的吸附强度降低，由此导致了含硫SCR反应中NO x 转化率下降．CeO 2/MIL-100(Fe)催化剂中由于添加了CeO 2，有效地减弱了SO 2对催化剂表面B酸性位上NH + 4物种吸附强度的影响，提高了含硫条件下NO x 的转化率，增强了复合催化剂在SCR反应中的抗硫性能． |
| 英文摘要: |
| In the selective catalytic reduction (SCR) reaction, SO 2 has the important effect on the catalytic activity of deNO x catalyst. The prepared metal-organic frameworks (MOFs) MIL-100(Fe) (materials of Institute Lavoisier, MIL) loading ceria catalyst by impregnation method shows 91% NO x conversion in 10 h at 250 ℃ with the presence of 500×10 -6 SO 2 in the SCR reaction, higher than that of 83% over MIL-100(Fe) catalyst. The results of in situ diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy experiments demonstrate that the intensity of NH + 4 species adsorbed on the Br nsted sites of MIL-100(Fe) surface decreases due to the presence of SO 2, which reduces the NO x conversion over MIL-100(Fe) in the SCR reaction. The addition of ceria in MIL-100(Fe) catalyst effectively inhibits the effect of SO 2 on the adsorbed NH + 4 species on the Br nsted sites, which increases NO x conversion and improves the ability of resistance to SO 2 of the composite catalyst in the SCR reaction. |
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