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Hydrocarbon specificity in the selective catalytic reduction of NOx over Cu-ZSM-5 and Co-ZSM-5 catalysts |
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| Authors: | V. A. Sadykov S. A. Beloshapkin E. A. Paukshtis G. M. Alikina I. Kochubei S. P. Degtyarev N. N. Bulgakov S. A. Veniaminov V. Netyaga R. V. Bunina A. N. Kharlanov E. V. Lunina V. V. Lunin V. A. Matyshak A. Ya. Rozovskii |
| Affiliation: | (1) 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: | Transformation of surface nitrates under CH4 (CH4+O2) was found to ensure steady-state activity of Co-ZSM-5 in the selective catalytic reduction of nitrogen oxides by methane (CH4-SCR). For Cu-ZSM-5, such species are mainly converted into NO. Relaxation of the coordination sphere due to oxygen and NO adsorption, stability of C,N-containing intermediates and activation routes of hydrocarbons (methane, propane) were analyzed as factors determining catalytic properties of Cu and Co cations. |
| Keywords: | Nitrogen oxides reduction by hydrocarbons cation-exchanged ZSM-5 mechanism reactivity of surface nitrates coordination relaxation intermediates |
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