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金属有机骨架MIL-100(Fe)担载CeO2复合脱硝催化剂抗硫性能研究

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Indexed by:期刊论文

Date of Publication:2016-07-26

Journal:大连理工大学学报

Included Journals:CSCD、PKU、ISTIC、Scopus

Volume:56

Issue:4

Page Number:348-354

ISSN No.:1000-8608

Key Words:选择催化还原;抗硫;金属有机骨架;CeO2/MIL-100(Fe)

Abstract:在选择催化还原(selective catalytic reduction,SCR)反应中,SO2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CeO2的CeO2/MIL-100(Fe)催化剂在250℃含有500×10-6 SO2的条件下,对NOx 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,SO2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 NOx 转化率下降.CeO2/MIL-100(Fe)催化剂中由于添加了 CeO2,有效地减弱了 SO2对催化剂表面 B酸性位上 N H+4物种吸附强度的影响,提高了含硫条件下 N Ox 的转化率,增强了复合催化剂在 SCR反应中的抗硫性能.

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