Mn/CeO                         2                          catalysts for SCR of NO                         x                          with NH                         3                         comparative study on the effect of supports on low-temperature catalytic activity

Ge Gao; Jian Wen Shi; Chang Liu; Chen Gao; Zhaoyang Fan; Chunming Niu

doi:10.1016/j.apsusc.2017.03.164

Mn/CeO ₂ catalysts for SCR of NO _x with NH ₃ comparative study on the effect of supports on low-temperature catalytic activity

Ge Gao
, Jian Wen Shi
, Chang Liu
, Chen Gao
, Zhaoyang Fan
, Chunming Niu

School of Electrical Engineering

Xi'an Jiaotong University

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

182 Scopus citations

Abstract

Two Mn/CeO ₂ catalysts were successfully prepared by the impregnation of Mn precursor on two supports, CeO ₂ microspheres (CeO ₂ -MSs) and CeO ₂ microrods (CeO ₂ -MRs), respectively. The obtained Mn/CeO ₂ -MSs and Mn/CeO ₂ -MRs catalysts were characterized by SEM, TEM, XRD, N ₂ physical adsorption, Raman spectroscopy, XPS, H ₂ -TPR, NH ₃ -TPD and in situ DRIFT in detail, and their catalytic activities and N ₂ selectivities were studied by selective catalytic reduction (SCR) of NO _x with NH ₃ . The results showed that the Mn/CeO ₂ -MSs catalyst presented much superior catalytic activity to the counterpart Mn/CeO ₂ -MRs catalyst, and an almost 100% NO _x conversion was maintained at 150–240 °C under a high space velocity of 36,000 h ⁻¹ . The high catalytic performance of Mn/CeO ₂ -MSs can be attributed to a series of better properties in comparison with Mn/CeO ₂ -MRs, such as unique yolk@void@shell microsphere structure, much larger specific surface area, higher relative percentages of Mn ⁴⁺ /Mn ⁿ⁺ and Ce ³⁺ /(Ce ³⁺ Ce ⁴⁺ ), more easily reduced of Mn species, more Brønsted acid sites. Furthermore, Mn/CeO ₂ -MSs catalyst presented excellent resistance to H ₂ O deactivation and SO ₂ poison, and the SCR reaction mechanism over Mn/CeO ₂ -MSs followed both E-R and L-H mechanisms.

Original language	English
Pages (from-to)	338-346
Number of pages	9
Journal	Applied Surface Science
Volume	411
DOIs	https://doi.org/10.1016/j.apsusc.2017.03.164
State	Published - 31 Jul 2017

Keywords

CeO
De-NO
Low temperature
MnO
Selective catalytic reduction

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10.1016/j.apsusc.2017.03.164

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Gao, G., Shi, J. W., Liu, C., Gao, C., Fan, Z., & Niu, C. (2017). Mn/CeO ₂ catalysts for SCR of NO _x with NH ₃ comparative study on the effect of supports on low-temperature catalytic activity Applied Surface Science, 411, 338-346. https://doi.org/10.1016/j.apsusc.2017.03.164

Gao, Ge ; Shi, Jian Wen ; Liu, Chang et al. / Mn/CeO ₂ catalysts for SCR of NO _x with NH ₃ comparative study on the effect of supports on low-temperature catalytic activity In: Applied Surface Science. 2017 ; Vol. 411. pp. 338-346.

@article{201f401c20ce42ce8d41e0efa05f0f1c,

title = " Mn/CeO 2 catalysts for SCR of NO x with NH 3 comparative study on the effect of supports on low-temperature catalytic activity ",

abstract = " Two Mn/CeO 2 catalysts were successfully prepared by the impregnation of Mn precursor on two supports, CeO 2 microspheres (CeO 2 -MSs) and CeO 2 microrods (CeO 2 -MRs), respectively. The obtained Mn/CeO 2 -MSs and Mn/CeO 2 -MRs catalysts were characterized by SEM, TEM, XRD, N 2 physical adsorption, Raman spectroscopy, XPS, H 2 -TPR, NH 3 -TPD and in situ DRIFT in detail, and their catalytic activities and N 2 selectivities were studied by selective catalytic reduction (SCR) of NO x with NH 3 . The results showed that the Mn/CeO 2 -MSs catalyst presented much superior catalytic activity to the counterpart Mn/CeO 2 -MRs catalyst, and an almost 100\% NO x conversion was maintained at 150–240 °C under a high space velocity of 36,000 h −1 . The high catalytic performance of Mn/CeO 2 -MSs can be attributed to a series of better properties in comparison with Mn/CeO 2 -MRs, such as unique yolk@void@shell microsphere structure, much larger specific surface area, higher relative percentages of Mn 4+ /Mn n+ and Ce 3+ /(Ce 3+ Ce 4+ ), more easily reduced of Mn species, more Br{\o}nsted acid sites. Furthermore, Mn/CeO 2 -MSs catalyst presented excellent resistance to H 2 O deactivation and SO 2 poison, and the SCR reaction mechanism over Mn/CeO 2 -MSs followed both E-R and L-H mechanisms.",

keywords = "CeO, De-NO, Low temperature, MnO, Selective catalytic reduction",

author = "Ge Gao and Shi, \{Jian Wen\} and Chang Liu and Chen Gao and Zhaoyang Fan and Chunming Niu",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

month = jul,

day = "31",

doi = "10.1016/j.apsusc.2017.03.164",

language = "英语",

volume = "411",

pages = "338--346",

journal = "Applied Surface Science",

issn = "0169-4332",

publisher = "Elsevier B.V.",

}

Gao, G, Shi, JW, Liu, C, Gao, C, Fan, Z & Niu, C 2017, ' Mn/CeO ₂ catalysts for SCR of NO _x with NH ₃ comparative study on the effect of supports on low-temperature catalytic activity ', Applied Surface Science, vol. 411, pp. 338-346. https://doi.org/10.1016/j.apsusc.2017.03.164

Mn/CeO ₂ catalysts for SCR of NO _x with NH ₃ comparative study on the effect of supports on low-temperature catalytic activity . / Gao, Ge; Shi, Jian Wen; Liu, Chang et al.
In: Applied Surface Science, Vol. 411, 31.07.2017, p. 338-346.

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

TY - JOUR

T1 - Mn/CeO 2 catalysts for SCR of NO x with NH 3 comparative study on the effect of supports on low-temperature catalytic activity

AU - Gao, Ge

AU - Shi, Jian Wen

AU - Liu, Chang

AU - Gao, Chen

AU - Fan, Zhaoyang

AU - Niu, Chunming

PY - 2017/7/31

Y1 - 2017/7/31

N2 - Two Mn/CeO 2 catalysts were successfully prepared by the impregnation of Mn precursor on two supports, CeO 2 microspheres (CeO 2 -MSs) and CeO 2 microrods (CeO 2 -MRs), respectively. The obtained Mn/CeO 2 -MSs and Mn/CeO 2 -MRs catalysts were characterized by SEM, TEM, XRD, N 2 physical adsorption, Raman spectroscopy, XPS, H 2 -TPR, NH 3 -TPD and in situ DRIFT in detail, and their catalytic activities and N 2 selectivities were studied by selective catalytic reduction (SCR) of NO x with NH 3 . The results showed that the Mn/CeO 2 -MSs catalyst presented much superior catalytic activity to the counterpart Mn/CeO 2 -MRs catalyst, and an almost 100% NO x conversion was maintained at 150–240 °C under a high space velocity of 36,000 h −1 . The high catalytic performance of Mn/CeO 2 -MSs can be attributed to a series of better properties in comparison with Mn/CeO 2 -MRs, such as unique yolk@void@shell microsphere structure, much larger specific surface area, higher relative percentages of Mn 4+ /Mn n+ and Ce 3+ /(Ce 3+ Ce 4+ ), more easily reduced of Mn species, more Brønsted acid sites. Furthermore, Mn/CeO 2 -MSs catalyst presented excellent resistance to H 2 O deactivation and SO 2 poison, and the SCR reaction mechanism over Mn/CeO 2 -MSs followed both E-R and L-H mechanisms.

AB - Two Mn/CeO 2 catalysts were successfully prepared by the impregnation of Mn precursor on two supports, CeO 2 microspheres (CeO 2 -MSs) and CeO 2 microrods (CeO 2 -MRs), respectively. The obtained Mn/CeO 2 -MSs and Mn/CeO 2 -MRs catalysts were characterized by SEM, TEM, XRD, N 2 physical adsorption, Raman spectroscopy, XPS, H 2 -TPR, NH 3 -TPD and in situ DRIFT in detail, and their catalytic activities and N 2 selectivities were studied by selective catalytic reduction (SCR) of NO x with NH 3 . The results showed that the Mn/CeO 2 -MSs catalyst presented much superior catalytic activity to the counterpart Mn/CeO 2 -MRs catalyst, and an almost 100% NO x conversion was maintained at 150–240 °C under a high space velocity of 36,000 h −1 . The high catalytic performance of Mn/CeO 2 -MSs can be attributed to a series of better properties in comparison with Mn/CeO 2 -MRs, such as unique yolk@void@shell microsphere structure, much larger specific surface area, higher relative percentages of Mn 4+ /Mn n+ and Ce 3+ /(Ce 3+ Ce 4+ ), more easily reduced of Mn species, more Brønsted acid sites. Furthermore, Mn/CeO 2 -MSs catalyst presented excellent resistance to H 2 O deactivation and SO 2 poison, and the SCR reaction mechanism over Mn/CeO 2 -MSs followed both E-R and L-H mechanisms.

KW - CeO

KW - De-NO

KW - Low temperature

KW - MnO

KW - Selective catalytic reduction

UR - https://www.scopus.com/pages/publications/85016441404

U2 - 10.1016/j.apsusc.2017.03.164

DO - 10.1016/j.apsusc.2017.03.164

M3 - 文章

AN - SCOPUS:85016441404

SN - 0169-4332

VL - 411

SP - 338

EP - 346

JO - Applied Surface Science

JF - Applied Surface Science

ER -

Gao G, Shi JW, Liu C, Gao C, Fan Z, Niu C. Mn/CeO ₂ catalysts for SCR of NO _x with NH ₃ comparative study on the effect of supports on low-temperature catalytic activity Applied Surface Science. 2017 Jul 31;411:338-346. doi: 10.1016/j.apsusc.2017.03.164

Mn/CeO ₂ catalysts for SCR of NO _x with NH ₃ comparative study on the effect of supports on low-temperature catalytic activity

Abstract

Keywords

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