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- Title
Research on CO-SCR performance of reducible oxide supported copper-based catalysts.
- Authors
LU Dong; DU Yali; LIU Jiangning; WU Chaohui; FAN Zhaoyang; AN Xia; WU Xu
- Abstract
Environmental friendly copper oxides were supposed as the potential CO-SCR denitrification catalysts due to the suitable redox capacity. Despite that, sintering at higher temperature and the poor disperity and stability of CuOz species remain the main factor to restrict their further application. Generally, the high dispersion of copper speces could be achieved via the coordinated combination of copper oxides and appropriate supports, thus overcoming the present disadvantages of copper-based oxides and improving catalytic activity. Based on this, herein, the reducible oxides (CeO2, yr Fe2 O3 ) were seeded as the support, where the CuO2/CeO2 and CuOz/yrFe2O3 catalysts (loading capacity of CuO was 2.5wt%) were prepared by traditional impregnation method, and the pure CuO was selected as the reference catalyst. Meanwhile, the influence of reducible support on the physicochemical properties and denitrification performance of copper-based catalyst was systematically studied. The results displayed that the introduction of the support improved the catalytic activity of copper oxides to some extent, where the CuOx/CeO2 catalyst with CeO2 as support not only showed better SCR catalyic activity, higher N2 selectivity, but also possessed the wider temperature window of activity. In addition, serious of characterizations (XRD, H--TPR, NO-TPD, SEM+EDX-Mapping, XPS, In situ DRIFTs and so on) analy¬sis revealed that compared with y-Fe2 O3, introducing CeO2 as the support was more conducive to improve the dispersion of CuOx species, optimize the valence distribution of CuOx species, as well as increase the surface active site. This work may serve as an important reference for fabricating Cu-based catalyst supported on reducible oxide with superior performance in potential applications for CO-SCR.
- Publication
Journal of Functional Materials / Gongneng Cailiao, 2022, Vol 53, Issue 11, p11007
- ISSN
1001-9731
- Publication type
Article
- DOI
10.3969/j.issn.1001-9731.2022.11.002