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

Abstract

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 NH3 and NO oxidation reaction. XRD and N2 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 NH3-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 N2O and NO2 reduction at high temperature. Water effects are attributed to the improved Cu ion reducibility and mobility. NO oxidation results provided no relation between NO2 formation and SCR activity. Physicochemical properties, NO conversion, N2 selectivity, and activation energy data showed that impregnated samples’ molecular structure and catalytic activity are comparable to the conventional ion-exchanged (IE) samples’ ones.

Authors:
 [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:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1430871
Report Number(s):
BNL-203423-2018-JAAM
Journal ID: ISSN 0256-1115
Grant/Contract Number:  
SC0012704; 37298
Resource Type:
Accepted Manuscript
Journal Name:
Korean Journal of Chemical Engineering
Additional Journal Information:
Journal Volume: 35; Journal Issue: 1; Journal ID: ISSN 0256-1115
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Akter, Nusnin, Chen, Xianyin, Parise, John, Boscoboinik, Jorge Anibal, and Kim, Taejin. Effects of copper loading on NH3-SCR and NO oxidation over Cu impregnated CHA zeolite. United States: N. p., 2017. Web. https://doi.org/10.1007/s11814-017-0268-x.
Akter, Nusnin, Chen, Xianyin, Parise, John, Boscoboinik, Jorge Anibal, & Kim, Taejin. Effects of copper loading on NH3-SCR and NO oxidation over Cu impregnated CHA zeolite. United States. https://doi.org/10.1007/s11814-017-0268-x
Akter, Nusnin, Chen, Xianyin, Parise, John, Boscoboinik, Jorge Anibal, and Kim, Taejin. Sat . "Effects of copper loading on NH3-SCR and NO oxidation over Cu impregnated CHA zeolite". United States. https://doi.org/10.1007/s11814-017-0268-x. https://www.osti.gov/servlets/purl/1430871.
@article{osti_1430871,
title = {Effects of copper loading on NH3-SCR and NO oxidation over Cu impregnated CHA zeolite},
author = {Akter, Nusnin and Chen, Xianyin and Parise, John and Boscoboinik, Jorge Anibal and Kim, Taejin},
abstractNote = {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 NH3 and NO oxidation reaction. XRD and N2 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 NH3-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 N2O and NO2 reduction at high temperature. Water effects are attributed to the improved Cu ion reducibility and mobility. NO oxidation results provided no relation between NO2 formation and SCR activity. Physicochemical properties, NO conversion, N2 selectivity, and activation energy data showed that impregnated samples’ molecular structure and catalytic activity are comparable to the conventional ion-exchanged (IE) samples’ ones.},
doi = {10.1007/s11814-017-0268-x},
journal = {Korean Journal of Chemical Engineering},
number = 1,
volume = 35,
place = {United States},
year = {2017},
month = {11}
}

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