Mechanistic insight into the promoting effect of partial substitution of Mn by Ce on N2 selectivity of MnTiO  catalyst for NH3-SCR of NO

Gao, Yu; Han, Zhitao; Zhai, Guangpeng; Lou, Song; Dong, Jingming; Yang, Shunkun; Pan, Xinxiang

doi:10.1016/j.jtice.2022.104269

Cited by 18 publications

(1 citation statement)

References 53 publications

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“…Abundant Mn 3+ signified the occurrence of electron transfer between Mo and Mn, , facilitating the formation of surface-adsorbed oxygen . Meanwhile, the increase in Mn 3+ inhibited the redox properties of the catalyst, thereby contributing to the prevention of the peroxidation of NH 3 to N 2 O. , After conducting an anti-SO 2 poisoning test, Mn 4+ present on the catalyst surface exhibited a marked reduction in comparison to the fresh catalysts, a change potentially due to the electron transfer from SO 2 to Mn 4+ . It is worth noting that the rate of Mn 4+ depletion in the MFMo 4 catalyst was lower than that in the MF catalyst, with a higher ratio of (Mn 4+ + Mn 3+ )/(Mn 4+ + Mn 3+ + Mn 2+ ) observed in the MFMo 4 catalyst.…”

Section: Resultsmentioning

confidence: 99%

A Novel MnO_x–MoO_x Codoped Iron-Based Catalyst for NH₃-SCR with Superior Catalytic Activity over a Wide Temperature Range

Zhang,

et al. 2024

Ind. Eng. Chem. Res.

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MnO x and MoO x , as additives, have proved effective in enhancing the NH 3 selective catalytic reduction activity of catalysts. In this study, a new Mn−Fe−Mo catalyst was prepared using both the precipitation method and impregnation method. The redox properties, surface acidity, and reaction intermediates of the prepared catalysts were analyzed using various techniques. The test results showed that the MFMo 4 catalyst achieved a NO x conversion rate exceeding 90% over the temperature range of 120−390 °C, demonstrating high potential to replace V-based catalysts due to outstanding activity at both high and low temperatures. The addition of MoO x exerted a detrimental impact on the redox property and avoided the production of N 2 O, thereby enhancing the N 2 selectivity. Furthermore, the codoping of MnO x and MoO x inhibited the adsorption of NO x on the catalysts while resulting in an increased number of Lewis acid sites on the catalyst. This promoted its reaction via the Eley−Rideal mechanism, which played a crucial role in ensuring the catalyst had excellent SCR activity over a wide temperature range.

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Section: Resultsmentioning

confidence: 99%

A Novel MnO_x–MoO_x Codoped Iron-Based Catalyst for NH₃-SCR with Superior Catalytic Activity over a Wide Temperature Range

Zhang,

et al. 2024

Ind. Eng. Chem. Res.

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Mechanisms of Medium- and Low-Temperature Denitration by Combined CO + NH3 on Mn–Ce/AC Catalysts and Their SO2 Poisoning

Luo,

Huang,

Shi

et al. 2024

Catal Lett

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Mechanism of NO removal by CO + NH3 coupling in iron–manganese/activated carbon catalysts at medium and low temperatures

Yuan,

Huang,

Shi

et al. 2024

Res Chem Intermed

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Mechanistic insight into the promoting effect of partial substitution of Mn by Ce on N2 selectivity of MnTiO catalyst for NH3-SCR of NO

Cited by 18 publications

References 53 publications

A Novel MnO_x–MoO_x Codoped Iron-Based Catalyst for NH₃-SCR with Superior Catalytic Activity over a Wide Temperature Range

A Novel MnO_x–MoO_x Codoped Iron-Based Catalyst for NH₃-SCR with Superior Catalytic Activity over a Wide Temperature Range

Mechanisms of Medium- and Low-Temperature Denitration by Combined CO + NH3 on Mn–Ce/AC Catalysts and Their SO2 Poisoning

Mechanism of NO removal by CO + NH3 coupling in iron–manganese/activated carbon catalysts at medium and low temperatures

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Mechanistic insight into the promoting effect of partial substitution of Mn by Ce on N2 selectivity of MnTiO catalyst for NH3-SCR of NO

Cited by 18 publications

References 53 publications

A Novel MnOx–MoOx Codoped Iron-Based Catalyst for NH3-SCR with Superior Catalytic Activity over a Wide Temperature Range

A Novel MnOx–MoOx Codoped Iron-Based Catalyst for NH3-SCR with Superior Catalytic Activity over a Wide Temperature Range

Mechanisms of Medium- and Low-Temperature Denitration by Combined CO + NH3 on Mn–Ce/AC Catalysts and Their SO2 Poisoning

Mechanism of NO removal by CO + NH3 coupling in iron–manganese/activated carbon catalysts at medium and low temperatures

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Product

Resources

About

A Novel MnO_x–MoO_x Codoped Iron-Based Catalyst for NH₃-SCR with Superior Catalytic Activity over a Wide Temperature Range

A Novel MnO_x–MoO_x Codoped Iron-Based Catalyst for NH₃-SCR with Superior Catalytic Activity over a Wide Temperature Range