Effects of acid treatments of carbon on N2O and NO reduction by carbon-supported copper catalysts

Z. H. Zhu; L. R. Radovic; G. Q. Lu

doi:10.1016/S0008-6223(99)00127-X

Effects of acid treatments of carbon on N₂O and NO reduction by carbon-supported copper catalysts

Z. H. Zhu, L. R. Radovic, G. Q. Lu

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Abstract

The influences of HCl, HNO₃ and HF treatments of carbon on N₂O and NO reduction with 20 wt% Cu-loaded activated carbon were studied. The order of activity in both N₂O and NO is as follows: Cu20/AC-HNO₃>Cu20/AC>Cu20/AC-HF>Cu20/AC-HCl. The same sequence was also observed for the amount of CO₂ evolved during TPD experiments of supports and for the catalyst dispersion. On the other hand, N₂O exhibited a higher reaction rate than NO and a higher sensitivity to acid treatments, and the presence of gas-phase O₂ had opposite effects in N₂O and NO reduction. The key role of carbon surface chemistry is examined to rationalize these findings and the relevant mechanistic and practical implications are discussed. The effects of oxygen surface groups on the pore structure of supports and catalysts are also analyzed.

Original language	English (US)
Pages (from-to)	451-464
Number of pages	14
Journal	Carbon
Volume	38
Issue number	3
DOIs	https://doi.org/10.1016/S0008-6223(99)00127-X
State	Published - 2000

All Science Journal Classification (ASJC) codes

General Chemistry
General Materials Science

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10.1016/S0008-6223(99)00127-X

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@article{fc6c52b0f3c444408adcb154db3656ac,

title = "Effects of acid treatments of carbon on N2O and NO reduction by carbon-supported copper catalysts",

abstract = "The influences of HCl, HNO3 and HF treatments of carbon on N2O and NO reduction with 20 wt% Cu-loaded activated carbon were studied. The order of activity in both N2O and NO is as follows: Cu20/AC-HNO3>Cu20/AC>Cu20/AC-HF>Cu20/AC-HCl. The same sequence was also observed for the amount of CO2 evolved during TPD experiments of supports and for the catalyst dispersion. On the other hand, N2O exhibited a higher reaction rate than NO and a higher sensitivity to acid treatments, and the presence of gas-phase O2 had opposite effects in N2O and NO reduction. The key role of carbon surface chemistry is examined to rationalize these findings and the relevant mechanistic and practical implications are discussed. The effects of oxygen surface groups on the pore structure of supports and catalysts are also analyzed.",

author = "Zhu, {Z. H.} and Radovic, {L. R.} and Lu, {G. Q.}",

note = "Funding Information: Financial support from the Australian Research Council (ARC) and the Commonwealth Department of Employment, Education and Youth Affairs under the TIL program is gratefully acknowledged. LRR wishes to thank Professor Victor Rudolph for his support during his sabbatical leave at the University of Queensland. The authors also wish to thank Dr. Nick Pollack of Calgon Carbon Corporation for kindly supplying the activated carbon samples. Help from Dr S. Wang in acid treatment of some of the carbon samples and pore structure characterization is appreciated. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.",

year = "2000",

doi = "10.1016/S0008-6223(99)00127-X",

language = "English (US)",

volume = "38",

pages = "451--464",

journal = "Carbon",

issn = "0008-6223",

publisher = "Elsevier Ltd",

number = "3",

}

TY - JOUR

T1 - Effects of acid treatments of carbon on N2O and NO reduction by carbon-supported copper catalysts

AU - Zhu, Z. H.

AU - Radovic, L. R.

AU - Lu, G. Q.

N1 - Funding Information: Financial support from the Australian Research Council (ARC) and the Commonwealth Department of Employment, Education and Youth Affairs under the TIL program is gratefully acknowledged. LRR wishes to thank Professor Victor Rudolph for his support during his sabbatical leave at the University of Queensland. The authors also wish to thank Dr. Nick Pollack of Calgon Carbon Corporation for kindly supplying the activated carbon samples. Help from Dr S. Wang in acid treatment of some of the carbon samples and pore structure characterization is appreciated. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2000

Y1 - 2000

N2 - The influences of HCl, HNO3 and HF treatments of carbon on N2O and NO reduction with 20 wt% Cu-loaded activated carbon were studied. The order of activity in both N2O and NO is as follows: Cu20/AC-HNO3>Cu20/AC>Cu20/AC-HF>Cu20/AC-HCl. The same sequence was also observed for the amount of CO2 evolved during TPD experiments of supports and for the catalyst dispersion. On the other hand, N2O exhibited a higher reaction rate than NO and a higher sensitivity to acid treatments, and the presence of gas-phase O2 had opposite effects in N2O and NO reduction. The key role of carbon surface chemistry is examined to rationalize these findings and the relevant mechanistic and practical implications are discussed. The effects of oxygen surface groups on the pore structure of supports and catalysts are also analyzed.

AB - The influences of HCl, HNO3 and HF treatments of carbon on N2O and NO reduction with 20 wt% Cu-loaded activated carbon were studied. The order of activity in both N2O and NO is as follows: Cu20/AC-HNO3>Cu20/AC>Cu20/AC-HF>Cu20/AC-HCl. The same sequence was also observed for the amount of CO2 evolved during TPD experiments of supports and for the catalyst dispersion. On the other hand, N2O exhibited a higher reaction rate than NO and a higher sensitivity to acid treatments, and the presence of gas-phase O2 had opposite effects in N2O and NO reduction. The key role of carbon surface chemistry is examined to rationalize these findings and the relevant mechanistic and practical implications are discussed. The effects of oxygen surface groups on the pore structure of supports and catalysts are also analyzed.

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U2 - 10.1016/S0008-6223(99)00127-X

DO - 10.1016/S0008-6223(99)00127-X

M3 - Article

AN - SCOPUS:0033874646

SN - 0008-6223

VL - 38

SP - 451

EP - 464

JO - Carbon

JF - Carbon

IS - 3

ER -

Effects of acid treatments of carbon on N₂O and NO reduction by carbon-supported copper catalysts

Abstract

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