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Title: Effects of copper loading on NH3-SCR and NO oxidation over Cu impregnated CHA zeolite

Cu/CHA catalysts with various Cu loadings (0.5 wt%–6.0 wt%) were synthesized via incipient wetness impregnation. The catalysts were then applied to the selective catalytic reduction (SCR) of NO with NH 3 and NO oxidation reaction. XRD and N 2 adsorption-desorption data showed that CHA structure was maintained with the incorporation of Cu, while specific surface areas decreased with increasing Cu loading. At intermediate Cu loading, 4 wt%, the highest NH 3-SCR activity was observed with ~98% N2 selectivity from 150°C to 300°C. Small amounts of water, 2%, slightly increased NO conversion in addition to the remarkable N 2O and NO 2 reduction at high temperature. Water effects are attributed to the improved Cu ion reducibility and mobility. NO oxidation results provided no relation between NO 2 formation and SCR activity. Physicochemical properties, NO conversion, N 2 selectivity, and activation energy data showed that impregnated samples’ molecular structure and catalytic activity are comparable to the conventional ion-exchanged (IE) samples’ ones.
 [1] ;  [2] ;  [2] ;  [3] ;  [1]
  1. Stony Brook Univ., NY (United States). Materials Science and Chemical Engineering Dept.
  2. Stony Brook Univ., NY (United States). Geosciences Dept.
  3. Stony Brook Univ., NY (United States). Materials Science and Chemical Engineering Dept.; Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Publication Date:
Report Number(s):
Journal ID: ISSN 0256-1115
Grant/Contract Number:
SC0012704; 37298
Accepted Manuscript
Journal Name:
Korean Journal of Chemical Engineering
Additional Journal Information:
Journal Volume: 35; Journal Issue: 1; Journal ID: ISSN 0256-1115
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
77 NANOSCIENCE AND NANOTECHNOLOGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; Chabazite Framework Zeolite; Selective Catalytic Reduction (SCR); Copper Loading; Incipient Wetness
OSTI Identifier: