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Surface Modification of Cu-SSZ-13 with CeO2 to Improve the Catalytic Performance for the Selective Catalytic Reduction of NO with NH3.
- Source :
-
Kinetics & Catalysis . Sep2020, Vol. 61 Issue 5, p750-757. 8p. - Publication Year :
- 2020
-
Abstract
- A series of Cu-SSZ-13@CeO2 catalysts with surface modification with CeO2 was prepared by the modified self-resemble method based on the one-pot synthesized Cu-SSZ-13 catalyst and applied for the selective catalytic reduction of NO by NH3. The low-temperature catalytic activity and the tolerance to SO2 + H2O of Cu-SSZ-13@CeO2 were found to enhance markedly compared with Cu-SSZ-13. In parallel, the XRD, N2-BET, H2-TPR, SEM, XPS, and in situ DRIFTS were performed to characterize the catalysts. XRD and SEM results proved that the surface of Cu-SSZ-13 was covered by nanoparticles of CeO2. XPS results further confirmed that Ce species were in the outer of the catalysts. N2-BET indicated that the physical structure parameters of the Cu-SSZ-13@CeO2 were changed obviously due to the coverage of CeO2. H2-TPR suggested that the redox properties of the Cu-SSZ-13@CeO2 catalysts were improved compared to the unmodified Cu-SSZ-13. In situ DRIFTS results demonstrated that the intensities of the bands attributed to NH3 and NOx species on the surface of Cu-SSZ-13@CeO2-2 enhanced due to the CeO2 modification, which played an important role for the NH3-SCR performance. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CATALYTIC reduction
*CATALYTIC activity
*CATALYSTS
*MODIFICATIONS
Subjects
Details
- Language :
- English
- ISSN :
- 00231584
- Volume :
- 61
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Kinetics & Catalysis
- Publication Type :
- Academic Journal
- Accession number :
- 146321329
- Full Text :
- https://doi.org/10.1134/S0023158420050109