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- W4226066353 abstract "The application of cerium-manganese oxides (CeMn) in controlling exhaust gas from biomass combustion is greatly inhibited due to poor resistance to alkali metals. Herein, we report a smart strategy to circumvent the K poisoning problem of CeMn by physically coupling with ZSM-5, which exhibited almost no activity loss even under a high loading of 2 wt% K2O. Results showed that in contrast to the conventionally believed disturbance of redox property and reduction of acid sites, the dominant effect from K loading on the deactivation of CeMn catalysts lies on the formation of chemically inert nitrates, which significantly restrains the reaction cycle via Langmuir-Hinshelwood route. With ZSM-5 hybridization, the stable nitrates over CeMn can be facilely activated and consumed by NH4+ species introduced by ZSM-5, thus transforming poisoning sites into active sites and ensuring superior catalytic performance. The study presenting here not only provides an efficient strategy for fabricating NH3-SCR catalysts with superior K resistance but also sheds new light on the deactivation mechanism of K over CeMn catalysts." @default.
- W4226066353 created "2022-05-05" @default.
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- W4226066353 date "2022-10-01" @default.
- W4226066353 modified "2023-10-14" @default.
- W4226066353 title "Cerium manganese oxides coupled with ZSM-5: A novel SCR catalyst with superior K resistance" @default.
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- W4226066353 doi "https://doi.org/10.1016/j.cej.2022.136530" @default.
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