NH3-SCR of NO with novel active, supported vanadium-containing Keggin-type heteropolyacid catalysts

Bukowski A, Schill L, Nielsen D, Mossin S, Riisager A, Albert J (2020)


Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2020

Journal

DOI: 10.1039/D0RE00033G

Abstract

Supported vanadium-substituted Keggin polyoxometalates (POMs) were applied as catalysts for the selective catalytic reduction of NO using NH3 as reductant (NH3-SCR). Interestingly, HPA-3 (H6PV3Mo9O40) was found to be the most active catalytic species, and TiO2 (anatase) the most promoting support for the SCR reaction in the temperature range 200-350 C. Moreover, 10 wt.% HPA 3 loading was found to be optimum resulting in nearly complete NO conversion at 350 °C. Characterization by several techniques, including N2-physisorption, NH3-TPD, FTIR, XPS and TEM showed distinctive structural HPA-3 support interactions explaining the beneficial interplay between both parts for the SCR reaction. Furthermore, different catalytically active surface species were identified at various reaction temperatures and SCR conditions by in-situ EPR spectroscopy. The study introduces a novel type of heterogeneous supported vanadium-based NH3-SCR catalysts comprising redox-active POMs, which so far mainly have been applied for homogeneously catalyzed reactions.

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APA:

Bukowski, A., Schill, L., Nielsen, D., Mossin, S., Riisager, A., & Albert, J. (2020). NH3-SCR of NO with novel active, supported vanadium-containing Keggin-type heteropolyacid catalysts. Reaction Chemistry & Engineering. https://dx.doi.org/10.1039/D0RE00033G

MLA:

Bukowski, Anna, et al. "NH3-SCR of NO with novel active, supported vanadium-containing Keggin-type heteropolyacid catalysts." Reaction Chemistry & Engineering (2020).

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