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具有层状结构的新型CeMoO - 粘土杂化催化剂用于NH₃选择性催化还原NO

Novel CeMo O -clay hybrid catalysts with layered structure for selective catalytic reduction of NO by NH.

作者信息

Xu Boyang, Liu Youlin, Shen Yuesong, Zhu Shemin

机构信息

College of Materials Science and Engineering, Nanjing Tech University Nanjing 210009 China

Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University Nanjing 210009 China.

出版信息

RSC Adv. 2018 Jan 11;8(5):2586-2592. doi: 10.1039/c7ra12153a. eCollection 2018 Jan 9.

DOI:10.1039/c7ra12153a
PMID:35541496
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9077446/
Abstract

A facile method is to prepare novel CeMo O -clay hybrid catalysts with layered structures by using organic cation modified clay as support. During the preparation process, cerium cations and molybdate anions are easily adsorbed and impregnated into the interlamellar space of the organoclay, and after calcination they undergo transformation to highly dispersed CeMo O nanoparticles within the interlamellar space of the clay. As expected, the prepared CeMoO -OC- catalysts with layered structures had high selective catalytic reduction (SCR) activity such as high NO conversion of >90% in the wide temperature range of 220-420 °C. Meanwhile, they also exhibit high stability and tolerance to water vapor (5 vol%) and SO (200 ppm), demonstrating that these novel catalysts could serve as a good alternative for NH-SCR in practical application.

摘要

一种简便的方法是使用有机阳离子改性粘土作为载体来制备具有层状结构的新型CeMoO -粘土杂化催化剂。在制备过程中,铈阳离子和钼酸根阴离子很容易被吸附并浸渍到有机粘土的层间空间中,经过煅烧后,它们在粘土层间空间内转化为高度分散的CeMoO纳米颗粒。正如预期的那样,制备的具有层状结构的CeMoO -OC-催化剂具有高选择性催化还原(SCR)活性,例如在220-420°C的宽温度范围内具有>90%的高NO转化率。同时,它们还表现出对水蒸气(5 vol%)和SO(200 ppm)的高稳定性和耐受性,表明这些新型催化剂在实际应用中可以作为NH-SCR的良好替代品。

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本文引用的文献

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Chem Sci. 2016 Feb 1;7(2):1109-1114. doi: 10.1039/c5sc03430b. Epub 2015 Oct 28.
2
Efficient NH-SCR removal of NO with highly ordered mesoporous WO(χ)-CeO at low temperatures.在低温下利用高度有序的介孔WO(χ)-CeO通过高效NH-SCR去除NO
Appl Catal B. 2017 Apr;203:199-209. doi: 10.1016/j.apcatb.2016.10.010. Epub 2016 Oct 13.
3
Simultaneous Removal of NO and Hg(0) from Flue Gas over Mn-Ce/Ti-PILCs.
Mn-Ce/Ti-PILCs 上同时脱除烟气中的 NO 和 Hg(0)。
Environ Sci Technol. 2015 Aug 4;49(15):9355-63. doi: 10.1021/acs.est.5b01435. Epub 2015 Jul 22.
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Significant Promotion Effect of Mo Additive on a Novel Ce-Zr Mixed Oxide Catalyst for the Selective Catalytic Reduction of NO(x) with NH3.钼添加剂对新型 Ce-Zr 混合氧化物催化剂用于 NH3 选择性催化还原 NO(x)的显著促进作用。
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Effect of Ce doping of TiO2 support on NH3-SCR activity over V2O5-WO3/CeO2-TiO2 catalyst.Ce 掺杂 TiO2 载体对 V2O5-WO3/CeO2-TiO2 催化剂上 NH3-SCR 活性的影响。
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Deactivation mechanism of potassium on the V₂O₅/CeO₂ catalysts for SCR reaction: acidity, reducibility and adsorbed-NOx.钾在 V₂O₅/CeO₂ 催化剂上对 SCR 反应的失活动力学:酸度、还原性和吸附态-NOx。
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