Oxidation of ammonia to nitrogen over Pt/Fe/ZSM5 catalyst: Influence of catalyst support on the low temperature activity

Min Sung Kim; Dae Won Lee; Sang Ho Chung; Yoon Ki Hong; Seong Ho Lee; Seong Hoon Oh; Il Hyoung Cho; Kwan Young Lee

doi:10.1016/j.jhazmat.2012.08.026

Oxidation of ammonia to nitrogen over Pt/Fe/ZSM5 catalyst: Influence of catalyst support on the low temperature activity

Min Sung Kim, Dae Won Lee, Sang Ho Chung, Yoon Ki Hong, Seong Ho Lee, Seong Hoon Oh, Il Hyoung Cho, Kwan Young Lee

Department of Chemical and Biological Engineering

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

43 Citations (Scopus)

Abstract

In this study, Pt/Fe/ZSM5 catalysts were applied to oxidation of ammonia, where the catalysts showed good low-temperature activity (≤200°C) for converting ammonia into nitrogen. With 1.5% Pt/0.5% Fe/ZSM5 catalyst, we could obtain 81% NH₃ conversion and 93% N₂ selectivity at 175°C at the short contact-time of w/f=0.00012gmin/mL. Through the characterization studies using high-resolution transmission electron microscopy (HRTEM) and X-ray spectroscopies (XRD, XPS), we could find that the active species was collaborating Pt/Fe species, which structure and activity were largely influenced by support material - in a positive way by ZSM5, rather than by Al₂O₃ and SiO₂. When using ZSM5 as the support material, Pt was highly dispersed exclusively on the Fe oxide, and the valence state and dispersion of Pt changed according to Fe loading amount.

Original language	English
Pages (from-to)	153-160
Number of pages	8
Journal	Journal of hazardous materials
Volume	237-238
DOIs	https://doi.org/10.1016/j.jhazmat.2012.08.026
Publication status	Published - 2012 Oct 30

Keywords

Ammonia oxidation
HRTEM
Pt dispersion
Pt/Fe/ZSM5
XPS

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution
Health, Toxicology and Mutagenesis

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10.1016/j.jhazmat.2012.08.026

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title = "Oxidation of ammonia to nitrogen over Pt/Fe/ZSM5 catalyst: Influence of catalyst support on the low temperature activity",

abstract = "In this study, Pt/Fe/ZSM5 catalysts were applied to oxidation of ammonia, where the catalysts showed good low-temperature activity (≤200°C) for converting ammonia into nitrogen. With 1.5% Pt/0.5% Fe/ZSM5 catalyst, we could obtain 81% NH3 conversion and 93% N2 selectivity at 175°C at the short contact-time of w/f=0.00012gmin/mL. Through the characterization studies using high-resolution transmission electron microscopy (HRTEM) and X-ray spectroscopies (XRD, XPS), we could find that the active species was collaborating Pt/Fe species, which structure and activity were largely influenced by support material - in a positive way by ZSM5, rather than by Al2O3 and SiO2. When using ZSM5 as the support material, Pt was highly dispersed exclusively on the Fe oxide, and the valence state and dispersion of Pt changed according to Fe loading amount.",

keywords = "Ammonia oxidation, HRTEM, Pt dispersion, Pt/Fe/ZSM5, XPS",

author = "Kim, {Min Sung} and Lee, {Dae Won} and Chung, {Sang Ho} and Hong, {Yoon Ki} and Lee, {Seong Ho} and Oh, {Seong Hoon} and Cho, {Il Hyoung} and Lee, {Kwan Young}",

year = "2012",

month = oct,

day = "30",

doi = "10.1016/j.jhazmat.2012.08.026",

language = "English",

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T1 - Oxidation of ammonia to nitrogen over Pt/Fe/ZSM5 catalyst

T2 - Influence of catalyst support on the low temperature activity

AU - Kim, Min Sung

AU - Lee, Dae Won

AU - Chung, Sang Ho

AU - Hong, Yoon Ki

AU - Lee, Seong Ho

AU - Oh, Seong Hoon

AU - Cho, Il Hyoung

AU - Lee, Kwan Young

PY - 2012/10/30

Y1 - 2012/10/30

N2 - In this study, Pt/Fe/ZSM5 catalysts were applied to oxidation of ammonia, where the catalysts showed good low-temperature activity (≤200°C) for converting ammonia into nitrogen. With 1.5% Pt/0.5% Fe/ZSM5 catalyst, we could obtain 81% NH3 conversion and 93% N2 selectivity at 175°C at the short contact-time of w/f=0.00012gmin/mL. Through the characterization studies using high-resolution transmission electron microscopy (HRTEM) and X-ray spectroscopies (XRD, XPS), we could find that the active species was collaborating Pt/Fe species, which structure and activity were largely influenced by support material - in a positive way by ZSM5, rather than by Al2O3 and SiO2. When using ZSM5 as the support material, Pt was highly dispersed exclusively on the Fe oxide, and the valence state and dispersion of Pt changed according to Fe loading amount.

AB - In this study, Pt/Fe/ZSM5 catalysts were applied to oxidation of ammonia, where the catalysts showed good low-temperature activity (≤200°C) for converting ammonia into nitrogen. With 1.5% Pt/0.5% Fe/ZSM5 catalyst, we could obtain 81% NH3 conversion and 93% N2 selectivity at 175°C at the short contact-time of w/f=0.00012gmin/mL. Through the characterization studies using high-resolution transmission electron microscopy (HRTEM) and X-ray spectroscopies (XRD, XPS), we could find that the active species was collaborating Pt/Fe species, which structure and activity were largely influenced by support material - in a positive way by ZSM5, rather than by Al2O3 and SiO2. When using ZSM5 as the support material, Pt was highly dispersed exclusively on the Fe oxide, and the valence state and dispersion of Pt changed according to Fe loading amount.

KW - Ammonia oxidation

KW - HRTEM

KW - Pt dispersion

KW - Pt/Fe/ZSM5

KW - XPS

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SN - 0304-3894

VL - 237-238

SP - 153

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JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

ER -

Oxidation of ammonia to nitrogen over Pt/Fe/ZSM5 catalyst: Influence of catalyst support on the low temperature activity

Abstract

Keywords

ASJC Scopus subject areas

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