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- Title
Fe-Beta@CeO<sub>2</sub> core-shell catalyst with tunable shell thickness for selective catalytic reduction of NO<sub> x</sub> with NH<sub>3</sub>.
- Authors
Liu, Jixing; Liu, Jian; Zhao, Zhen; Wei, Yuechang; Song, Weiyu
- Abstract
A series of core-shell structural deNOx catalysts using small-grain Beta supporting FeOx nanoparticles as the core and tunable CeO2 thin film thickness as sheaths were designed and controllably synthesized. Their catalytic performances were tested for selective catalytic reduction of NOx with NH3 (NH3-SCR). It was found that CeO2 shell thickness plays an important role in influencing the acidity and redox properties of the catalysts. Fe-Beta@CeO2 core-shell catalysts exhibit excellent resistance to H2O and SO2 and high NOx conversion (above 90%) in the wide temperature range (225-565°C). The kinetics result indicates that the coating of CeO2 shell significantly increases the pore diffusion resistance of Fe-Beta@CeO2 catalysts. Furthermore, in situ DRIFT results reveal that CeO2 shell can promote the formation of NO2 and cis-
- Subjects
CATALYTIC reduction; IRON oxide nanoparticles; OXIDATION-reduction reaction; ANALYTICAL mechanics; ACIDITY; DIFFUSION
- Publication
AIChE Journal, 2017, Vol 63, Issue 10, p4430
- ISSN
0001-1541
- Publication type
Article
- DOI
10.1002/aic.15743