基于铜变化 SSZ-13 的三维打印单片作为氮氧化物 SCR 催化剂

IF 3.8 3区化学 Q2 CHEMISTRY, PHYSICAL

Catalysts Pub Date : 2024-01-19 DOI:10.3390/catal14010085

E. M. Cepollaro, S. Cimino, M. D'Agostini, Nicola Gargiulo, G. Franchin, L. Lisi

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引用次数: 0

摘要

研究了通过直接油墨写入法制造的含有 60% SSZ-13（SiO2/Al2O3 = 23）和二氧化硅（SiO2）以及 10% 的青石作为粘合剂的单晶体，这些单晶体在与铜进行短时间（4 小时）和长时间（24 小时）的离子交换后，可作为自立结构催化剂用于氮氧化物的 NH3-SCR，然后与在相同条件下交换的纯 SSZ-13 进行比较。对催化剂进行了形态（XRD 和 SEM）、质地（BET 和孔径分布）、化学（ICP-MS）、氧化还原（H2-TPR）和表面（NH3-TPD）分析。二氧化硅基粘合剂均匀地覆盖在 SSZ-13 颗粒上，铜也均匀分布。纯铜交换 SSZ-13 沸石的主要特征在复合单体中得以保留，粘合剂部分的作用微乎其微。在 70-550 °C 温度范围内对整体和粉末样品进行的 NH3-SCR 测试表明，复合整体具有很好的活性，复合材料的分层结构提高了 SSZ-13 的内在活性。

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3D-Printed Monoliths Based on Cu-Exchanged SSZ-13 as Catalyst for SCR of NOx

Monoliths manufactured by Direct Ink Writing containing 60% SSZ-13 (SiO2/Al2O3 = 23) and SiO2 with 10% laponite as a binder were investigated as self-standing structured catalysts for NH3-SCR of NOx after a short (4 h) and prolonged (24 h) ion exchange with copper and then compared with pure SSZ-13 exchanged under the same conditions. The catalysts were characterized by morphological (XRD and SEM), textural (BET and pore size distribution), chemical (ICP-MS), red-ox (H2-TPR), and surface (NH3-TPD) analyses. The silica-based binder uniformly covered the SSZ-13 particles, and copper was uniformly distributed as well. The main features of the pure Cu-exchanged SSZ-13 zeolite were preserved in the composite monoliths with a negligible contribution of the binder fraction. NH3-SCR tests, carried out on both monolithic and powdered samples in the temperature range of 70–550 °C, showed that composite monoliths provided very good activity, and that the intrinsic activity of SSZ-13 was enhanced by the hierarchical structure of the composite material.

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来源期刊

Catalysts CHEMISTRY, PHYSICAL-

CiteScore

6.80

自引率

7.70%

发文量

1330

审稿时长

3 months

期刊介绍： Catalysts (ISSN 2073-4344) is an international open access journal of catalysts and catalyzed reactions. Catalysts publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.