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Investigation of Mn Promotion on HKUST-1 Metal-Organic Frameworks for Low-Temperature Selective Catalytic Reduction of NO with NH3
ChemCatChem ( IF 3.8 ) Pub Date : 2021-07-12 , DOI: 10.1002/cctc.202100431
Katarzyna Świrk 1 , Gérard Delahay 2 , Abdelali Zaki 3 , Karim Adil 3 , Amandine Cadiau 3
Affiliation  

A series of HKUST-1 supported catalysts (also known as Cu-BTC, or MOF-199 [copper(II)-benzene-1,3,5-tricarboxylate]) modified with different loadings of manganese were synthesized and characterized by powder X-ray diffraction, scanning electron microscopy/energy dispersive spectroscopy, nitrogen sorption, thermogravimetric analysis, and temperature-programmed desorption with NH3. The structural and textural properties of the solids, compared to the reference support, are preserved as much as possible when the manganese content is not higher than 5.0 wt.%. This allows to obtain effective catalysts at low temperatures (<200 °C) in the selective catalytic reduction of NO with NH3. The highest efficiency is obtained with the catalyst containing 3.75 wt.% of manganese which exhibits NO conversion of 68 % at weight hourly space velocity (WHSV) of 96,000 ml/h g. This performance in NO reduction is recognized to be one of the best in the series of HKUST-1-Mnx catalysts. Nevertheless, their narrow temperature window for the working reaction and sensitivity to the presence of water vapor and sulfur dioxide remain a drawback.

中文翻译:

HKUST-1 金属-有机骨架对 NH3 低温选择性催化还原 NO 的 Mn 促进研究

合成了一系列以不同负载量的锰改性的 HKUST-1 负载型催化剂(也称为 Cu-BTC,或 MOF-199 [copper(II)-benzo-1,3,5-tricarboxylate])并用粉末 X 表征射线衍射、扫描电子显微镜/能量色散光谱、氮吸附、热重分析和用 NH 3的程序升温解吸。与参考载体相比,当锰含量不高于 5.0 重量%时,固体的结构和质地特性尽可能得到保留。这允许在低温 (<200 °C) 下获得有效的催化剂,用于用 NH 3选择性催化还原 NO. 使用含有 3.75 wt.% 锰的催化剂获得最高效率,在 96,000 ml/h g 的重时空速 (WHSV) 下,NO 转化率为 68%。这种 NO 还原性能被认为是 HKUST-1-Mnx 催化剂系列中最好的之一。然而,它们用于工作反应的狭窄温度窗口以及对水蒸气和二氧化硫存在的敏感性仍然是一个缺点。
更新日期:2021-09-17
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