Local Structure Stability of Cu-Al_2O_3 NOx Removal Catalyst

Masakuni OZAWA; Marx WINTERER; Chun-Keung LOONG; Suguru SUZUKI

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Local Structure Stability of Cu-Al_2O_3 NOx Removal Catalyst

机译：Cu-Al_2O_3 NOx脱除催化剂的局部结构稳定性

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The crystal phases, microstructural features, and local atomic coordination of CuO-Al_2O_3 catalyst for NOx removal were studied by some experimental techniques. A spinel-like phase, which exhibits short-range structure, appears at around 900℃. Catalytic activity can be maintained at <900℃, but degenerated at >1100℃. The activity of catalyst is controlled by the Cu-containing crystal phase of surface spinel. At low heating temperatures, the diffusion of copper into alumina will be important to surface modification to create active sites. The ESR and XANES results suggest that atomic structures in the interfacial area appear to play an important role in the lean-NOx removal activity.

机译：通过一些实验技术研究了CuO-Al_2O_3脱氮催化剂的晶相，微观结构特征和局部原子配位。尖晶石状相在900℃左右出现，具有短程结构。催化活性可以在<900℃下保持，但在> 1100℃下会降解。催化剂的活性由表面尖晶石的含Cu晶相控制。在较低的加热温度下，铜扩散到氧化铝中对表面改性以产生活性位点很重要。 ESR和XANES结果表明，界面区域的原子结构似乎在贫NOx去除活性中起重要作用。

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来源
《Materials Science Research International》 |2003年第1期|p.114-116|共3页
作者
Masakuni OZAWA; Marx WINTERER; Chun-Keung LOONG; Suguru SUZUKI;
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作者单位

Ceramics Research laboratory, Nagoya Institute of Technology, Tajimi, Gifu 507-0071, Japan;

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原文格式 PDF
正文语种 eng
中图分类一般工业技术;
关键词
alumina; catalyst; copper; nitrogen oxides; automotive exhaust; lean-burn; ESR; XANES;

机译：氧化铝;催化剂;铜;氮氧化物;汽车尾气;稀燃;ESR;XANES;

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专利

1. Cesium as Alkali Promoter in Me-Cs (Me = Cu, Co, Fe)/ Al2O3 Structured Catalysts for the Simultaneous Removal of Soot and NOx [J] . Sonia Ascaso, María Elena Gálvez, Rafael Moliner, Modern Research in Catalysis . 2013,第3期

机译：铯作为Me-Cs（Me = Cu，Co，Fe）/ Al2O3结构催化剂中碱促进剂的同时去除烟灰和NOx
2. Mechanism of NH3 Selective Catalytic Reduction Reaction for NOx Removal from Diesel Engine Exhaust and Hydrothermal Stability of Cu-Mn/Zeolite Catalysts [J] . Cheng Min, Jiang Boqiong, Yao Shuiliang, The journal of physical chemistry, C. Nanomaterials and interfaces . 2018,第1期

机译：NH3选择性催化还原反应NOx从柴油发动机排空和Cu-Mn /沸石催化剂的水热稳定性的催化还原反应
3. HERFD-XANES and XES as complementary operando tools for monitoring the structure of Cu-based zeolite catalysts during NOx-removal by ammonia SCR [J] . T Günter, D E Doronkin, H W P Carvalho, Journal of Physics: Conference Series . 2016,第1期

机译：HERFD-XANES和XES作为补充操作工具，用于在氨气SCR脱除NOx期间监测Cu基沸石催化剂的结构
4. Supported ruthenium carbido-cluster catalysts for the catalytic removal of nitrogen monoxide and sulfur dioxide: the preparation process monitored by sulfur K-edge X-ray absorption near-edge structure [C] . Yasuo Izumi, Taketoshi Minato, Ken-ichi Aika, 8th International Symposium on Scientific Bases for the Preparation of Heterogeneous Catalysts, Sep 9-12, 2002, Louvain-la-Neuve, Belgium . 2002

机译：用于催化去除一氧化氮和二氧化硫的负载钌碳基团簇催化剂：通过硫K边缘X射线吸收近边缘结构监测的制备过程
5. Nanostructured environmental catalysts for carbon monoxide and volatile organic compounds removal. [D] . Ho, Ka Yee. 2006

机译：用于去除一氧化碳和挥发性有机化合物的纳米结构环境催化剂。
6. Evaluation of Cu/SAPO-34 Catalysts Prepared by Solid-Stateand Liquid Ion-Exchange Methods for NOx Removal by NH3-SCR [O] . Maitane Urrutxua, Beñat Pereda-Ayo, Unai De-La-Torre, 2019

机译：固态制备Cu / SAPO-34催化剂的评价和液体离子交换法去除NH3-SCR的NOx
7. Local Structure Stability of Cu-Al2O3 NOx Removal Catalyst [O] . Masakuni OZAWA, Marx WINTERER, Chun-Keung LOONG, 2003

机译：Cu-Al2O3 NOx去除催化剂的局部结构稳定性

Local Structure Stability of Cu-Al_2O_3 NOx Removal Catalyst

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