Nitrous oxide decomposition over La0.3Sr0.7Co0.7Fe0.3O3−Δ catalyst
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Author list: Hartley U.W., Tongnan V., Laosiripojana N., Kim-Lohsoontorn P., Li K.
Publisher: Springer Netherlands
Publication year: 2018
Volume number: 125
Issue number: 1
Start page: 85
End page: 97
Number of pages: 13
ISSN: 1878-5190
eISSN: 1878-5190
Languages: English-Great Britain (EN-GB)
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Abstract
Nano-sized La0.3Sr0.7Co0.7Fe0.3O3-δ (LSFC3773) was prepared as a catalyst for nitrous oxide (N2O) decomposition by a sonochemical method. The catalyst provided a complete conversion of N2O at 450 °C, showing the best performance among most recent industrial catalysts, and offered 99.7–100% conversion at higher temperatures, e.g., 540–600 °C. A suitable operating temperature range for the reaction to avoid NOx formation is from 400 to 600 °C. The activation energy and the pre-exponential factor were 42.96 kJ/mol and 161,135.35 mol/gcat h bar. Oxygen inhibition was observed and was more obvious as the sample approached full surface coverage (θ=1) at 375 °C using a 100% N2O feed. The reaction occurred via the Eley–Rideal mechanism. Two possible model mechanisms were suggested according to the experimental phenomenon and the rate coefficient order of each elementary steps. © 2018, Akadémiai Kiadó, Budapest, Hungary.
Keywords
Eley–Rideal
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