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Reactivity and transformation routes of surface nitrates in the reaction of NOx reduction by C3H8 over cation-exchanged zeolites |
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| Authors: | V A Sadykov E A Paukshtis S A Beloshapkin G M Alikina S A Veniaminov E V Netyaga R V Bunina E V Lunina A N Kharlanov V V Lunin V A Matyshak and A Ya Rozovskii |
| Institution: | (1) Federal Scientific Center, Boreskov Institute of Catalysis, 630090 Novosibirsk, Russia;(2) Novosibirsk State University, 630090 Novosibirsk, Russia;(3) Chemical Department, Lomonosov Moscow State University, 119899 Moscow, Russia;(4) Semenov Institute of Chemical Physics RAN, 117334 Moscow, Russia;(5) Topchiev Institute of Petrochemical Synthesis RAN, 117912 Moscow, Russia |
| Abstract: | FITRS combined with15N and18O isotope substitution and TPD have revealed that nitrates are the most abundant ad-NOx species on over-exchanged Cu- and Co-ZSM-5 zeolites. the transformation rates of such species under the action of a propane—oxygen mixture were found to be comparable and sufficiently high to afford steady-state catalytic activities. A scheme of the reaction mechanism including C, N-containing intermediates detected in work is suggested. |
| Keywords: | Nitrogen oxides selective reduction propane ZSM-5 copper and cobalt cations surface nitrates structure and reactivity |
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