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

Akter, Nusnin; Chen, Xianyin; Parise, John; Boscoboinik, Jorge Anibal; Kim, Taejin

doi:10.1007/s11814-017-0268-x

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

Journal Article · Sat Nov 25 00:00:00 EST 2017 · Korean Journal of Chemical Engineering

DOI:https://doi.org/10.1007/s11814-017-0268-x· OSTI ID:1430871

Akter, Nusnin ^[1]; Chen, Xianyin ^[2]; Parise, John ^[2]; Boscoboinik, Jorge Anibal ^[3]; Kim, Taejin ^[1]

Stony Brook Univ., NY (United States). Materials Science and Chemical Engineering Dept.
Stony Brook Univ., NY (United States). Geosciences Dept.
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)

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.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012704; 37298

OSTI ID:: 1430871

Report Number(s):: BNL-203423-2018-JAAM

Journal Information:: Korean Journal of Chemical Engineering, Vol. 35, Issue 1; ISSN 0256-1115

Country of Publication:: United States

Language:: English

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Cited by: 18 works

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

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