Selective catalytic reduction of nitrogen oxides by ammonia over the dual-zone FeBeta∥MnCe/FeBeta catalyst

The properties of the FeBeta zeolite catalyst, MnCe/FeBeta composite catalyst, and FeBeta∥MnCe/FeBeta dual-zone catalytic system were studied in the selective catalytic reduction of nitrogen oxides with ammonia. The combination of the low-temperature (MnCe/FeBeta) and high-temperature (FeBeta) catal...

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Bibliographic Details
Published in:Russian chemical bulletin 2020-12, Vol.69 (12), p.2274-2280
Main Authors: Mytareva, A. I., Bokarev, D. A., Baeva, G. N., Stakheev, A. Yu
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
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Inorganic Chemistry
Organic Chemistry
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Summary:The properties of the FeBeta zeolite catalyst, MnCe/FeBeta composite catalyst, and FeBeta∥MnCe/FeBeta dual-zone catalytic system were studied in the selective catalytic reduction of nitrogen oxides with ammonia. The combination of the low-temperature (MnCe/FeBeta) and high-temperature (FeBeta) catalysts makes it possible to significantly improve the efficiency of NO x removal in a wide temperature range (200–500 °C) in the presence of the FeBeta∥MnCe/FeBeta system. It was found that this system also demonstrates high activity in the catalytic oxidation of residual ammonia retaining high selectivity in molecular nitrogen formation even under ammonia excess conditions (NH 3 : NO > 1).
ISSN:1066-5285
1573-9171
DOI:10.1007/s11172-020-3043-9