Mechanistic study of the SCR of NO with propylene over Co/ZSM-5 using in-situ FT-IR

Mechanistic study of the SCR of NO with propylene over Co/ZSM-5 using in-situ FT-IR The selective catalytic reduction (SCR) of NO with propylene over Co-exchanged ZSM-5 (Co/ZSM-5) was studied using in-situ FTIR. Propylene was activated easily by NO in the absence of oxygen above 200°C, leading to the formation of three different types of surface NCO species; Cobonded (2235 and 2195 cm−1), Si-bonded (2300 cm−1) and Al-bonded (2272 cm−1). These surface NCO species were stable in NO or oxygen atmosphere up to 400°C but in NO+oxygen they were easily converted to the final products of N2 and CO2. It is supposed that the SCR of NO over Co/ZSM-5 occurs through the Co- and Al-bonded NCO intermediates and its conversion is the rate-limiting step. Research on Chemical Intermediates Springer Journals

Mechanistic study of the SCR of NO with propylene over Co/ZSM-5 using in-situ FT-IR

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Springer Netherlands
Copyright © 1998 by Springer
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
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