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FeO x /Al 2 O 3 catalysts for high-temperature decomposition of N 2 O under conditions of NH 3 oxidation in nitric acid production
The catalytic activity of a series of FeO x /Al 2 O 3 prepared under various conditions was evaluated for high temperature decomposition of N 2 O (HT-deN 2 O) in a complex gas mixture produced by oxidation of ammonia. Thus the relevant step in the industrial nitric acid production process was simula...
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| Published in: | Catalysis science & technology 2018, Vol.8 (11), p.2841-2852 |
|---|---|
| Main Authors: | , , , , , , , , , |
| Format: | Article |
| Language: | English |
| Citations: | Items that this one cites Items that cite this one |
| Online Access: | Get full text |
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| Summary: | The catalytic activity of a series of FeO
x
/Al
2
O
3
prepared under various conditions was evaluated for high temperature decomposition of N
2
O (HT-deN
2
O) in a complex gas mixture produced by oxidation of ammonia. Thus the relevant step in the industrial nitric acid production process was simulated. The catalyst stability during long-term exposure (12 days) to reaction conditions relevant to HT-deN
2
O was studied. Both fresh and aged FeO
x
/Al
2
O
3
exhibited more than 90% conversion of N
2
O in the 750–900 °C temperature range. Structural analysis showed that the prepared FeO
x
/Al
2
O
3
catalysts contained various proportions of δ, θ and α alumina phases and up to four individual iron species. In the δ and θ Al
2
O
3
phases, well stabilized Fe(
iii
) in T
d
or O
h
coordination was identified as the active species in HT-deN
2
O. |
|---|---|
| ISSN: | 2044-4753 2044-4761 |
| DOI: | 10.1039/C8CY00383A |