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Journal of Nanoparticle Research

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01.04.2019 | Research Paper

The influence of the pore structure on the SO₂ tolerance for selective catalytic reduction of NO_x with NH₃ over MnO_x-TiO₂/MWCNTs catalysts

verfasst von: Chong Xie, Jian-Wen Shi, Shenghui Yang, Xifei Li

Erschienen in: Journal of Nanoparticle Research | Ausgabe 4/2019

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Abstract

The MnO_x-TiO₂/MWCNTs nanocomposites were used as De-NO_x catalysts to study the deep-rooted reason for the deactivation. Based on a series of characterization on as-prepared catalyst and poisoned catalyst, the results showed that the chief culprit for the deactivation is the micropores in the De-NO_x catalyst. The formed ammonium (bi)sulfate in the micropores during the SCR reaction process could not be took away by the gas flow soon and then deposited on the catalyst surface gradually, and further covered the active sites. And the poisoned catalysts could be recovered partly rather than fully by heat treatment at 500 °C because of the decomposition of the ammonium (bi)sulfate and the phase transition of the TiO₂.

Vorheriger Artikel Rapid preparation of homogeneous carbon dots with yellow fluorescence and formation mechanistic investigation

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Titel: The influence of the pore structure on the SO2 tolerance for selective catalytic reduction of NOx with NH3 over MnOx-TiO2/MWCNTs catalysts
verfasst von: Chong Xie
Jian-Wen Shi
Shenghui Yang
Xifei Li
Publikationsdatum: 01.04.2019
Verlag: Springer Netherlands
Erschienen in: Journal of Nanoparticle Research / Ausgabe 4/2019
Print ISSN: 1388-0764
Elektronische ISSN: 1572-896X
DOI: https://doi.org/10.1007/s11051-019-4519-0

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