Catalytic performance and mechanism of Mn-Fe/TiO2 for low-temperature selective reduction of NO with NH3

Bi Jun Wu; Xiao Qin Liu; Ping Xiao; Shu Gang Wang

Catalytic performance and mechanism of Mn-Fe/TiO₂ for low-temperature selective reduction of NO with NH₃

Bi Jun Wu, Xiao Qin Liu, Ping Xiao, Shu Gang Wang

COLLEGE OF CHEMICAL ENGINEERING

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

Mn-Fe/TiO₂ catalyst was prepared by co-precipitation depositing method. It has high catalytic activity in the range of 80-160°C. The NO_x conversation obtains 92.5% as low as 80°C, with φ(H₂O)=6% and φ(SO₂)=0.01%, it yields 95% at 120°C steadily. The x-ray diffraction (XRD) profiles show iron oxide interacts with manganese dioxide, enhances the dispersion and reduces the crystallinity of both oxides on titania. The Fourier transform infrared (FT-IR) and in-situ infrared (Situ IR) spectra suggest that NH₃ adsorbs on Lewis acid sites of MnO₂ mainly in amide -NH₂ specie, then reacts with NO to intermediate product NH₂NO, giving rise to N₂ and H₂O, while a few of it adsorb on Br0nst acid sites in the form of NH⁴⁺. O₂ can increase both of routes on the above two kinds of acid sites.

Original language	English
Pages (from-to)	51-56
Number of pages	6
Journal	Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
Volume	27
Issue number	17
State	Published - 15 Jun 2007

Keywords

Infrared spectrum
Low-temperature selective catalytic reduction
Mechanism
Mn-Fe/TiO
Selective catalytic reduction of NO with NH

Cite this

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title = "Catalytic performance and mechanism of Mn-Fe/TiO2 for low-temperature selective reduction of NO with NH3",

abstract = "Mn-Fe/TiO2 catalyst was prepared by co-precipitation depositing method. It has high catalytic activity in the range of 80-160°C. The NOx conversation obtains 92.5% as low as 80°C, with φ(H2O)=6% and φ(SO2)=0.01%, it yields 95% at 120°C steadily. The x-ray diffraction (XRD) profiles show iron oxide interacts with manganese dioxide, enhances the dispersion and reduces the crystallinity of both oxides on titania. The Fourier transform infrared (FT-IR) and in-situ infrared (Situ IR) spectra suggest that NH3 adsorbs on Lewis acid sites of MnO2 mainly in amide -NH2 specie, then reacts with NO to intermediate product NH2NO, giving rise to N2 and H2O, while a few of it adsorb on Br0nst acid sites in the form of NH4+. O2 can increase both of routes on the above two kinds of acid sites.",

keywords = "Infrared spectrum, Low-temperature selective catalytic reduction, Mechanism, Mn-Fe/TiO, Selective catalytic reduction of NO with NH",

author = "Wu, {Bi Jun} and Liu, {Xiao Qin} and Ping Xiao and Wang, {Shu Gang}",

year = "2007",

month = jun,

day = "15",

language = "英语",

volume = "27",

pages = "51--56",

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publisher = "Chinese Society for Electrical Engineering",

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TY - JOUR

T1 - Catalytic performance and mechanism of Mn-Fe/TiO2 for low-temperature selective reduction of NO with NH3

AU - Wu, Bi Jun

AU - Liu, Xiao Qin

AU - Xiao, Ping

AU - Wang, Shu Gang

PY - 2007/6/15

Y1 - 2007/6/15

N2 - Mn-Fe/TiO2 catalyst was prepared by co-precipitation depositing method. It has high catalytic activity in the range of 80-160°C. The NOx conversation obtains 92.5% as low as 80°C, with φ(H2O)=6% and φ(SO2)=0.01%, it yields 95% at 120°C steadily. The x-ray diffraction (XRD) profiles show iron oxide interacts with manganese dioxide, enhances the dispersion and reduces the crystallinity of both oxides on titania. The Fourier transform infrared (FT-IR) and in-situ infrared (Situ IR) spectra suggest that NH3 adsorbs on Lewis acid sites of MnO2 mainly in amide -NH2 specie, then reacts with NO to intermediate product NH2NO, giving rise to N2 and H2O, while a few of it adsorb on Br0nst acid sites in the form of NH4+. O2 can increase both of routes on the above two kinds of acid sites.

AB - Mn-Fe/TiO2 catalyst was prepared by co-precipitation depositing method. It has high catalytic activity in the range of 80-160°C. The NOx conversation obtains 92.5% as low as 80°C, with φ(H2O)=6% and φ(SO2)=0.01%, it yields 95% at 120°C steadily. The x-ray diffraction (XRD) profiles show iron oxide interacts with manganese dioxide, enhances the dispersion and reduces the crystallinity of both oxides on titania. The Fourier transform infrared (FT-IR) and in-situ infrared (Situ IR) spectra suggest that NH3 adsorbs on Lewis acid sites of MnO2 mainly in amide -NH2 specie, then reacts with NO to intermediate product NH2NO, giving rise to N2 and H2O, while a few of it adsorb on Br0nst acid sites in the form of NH4+. O2 can increase both of routes on the above two kinds of acid sites.

KW - Infrared spectrum

KW - Low-temperature selective catalytic reduction

KW - Mechanism

KW - Mn-Fe/TiO

KW - Selective catalytic reduction of NO with NH

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M3 - 文章

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JO - Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering

JF - Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering

IS - 17

ER -

Catalytic performance and mechanism of Mn-Fe/TiO₂ for low-temperature selective reduction of NO with NH₃

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